From 114b802e87bca5edbc2c59fc2c5caad3ec90bca6 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 2 Jan 2008 13:53:32 -0800
Subject: [PATCH] [965] Convert clip unit to use a cache key instead of
 brw_cache_data.

---
 src/mesa/drivers/dri/i965/brw_clip_state.c | 85 ++++++++++++++++------
 1 file changed, 64 insertions(+), 21 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_clip_state.c b/src/mesa/drivers/dri/i965/brw_clip_state.c
index 7640a39b452..cec717ee26e 100644
--- a/src/mesa/drivers/dri/i965/brw_clip_state.c
+++ b/src/mesa/drivers/dri/i965/brw_clip_state.c
@@ -34,46 +34,72 @@
 #include "brw_defines.h"
 #include "macros.h"
 
+struct brw_clip_unit_key {
+   unsigned int total_grf;
+   unsigned int urb_entry_read_length;
+   unsigned int curb_entry_read_length;
+   unsigned int clip_mode;
 
+   unsigned int curbe_offset;
 
-static void upload_clip_unit( struct brw_context *brw )
-{
-   struct brw_clip_unit_state clip;
+   unsigned int nr_urb_entries, urb_size;
+};
 
-   memset(&clip, 0, sizeof(clip));
+static void
+clip_unit_populate_key(struct brw_context *brw, struct brw_clip_unit_key *key)
+{
+   memset(key, 0, sizeof(*key));
 
    /* CACHE_NEW_CLIP_PROG */
-   clip.thread0.grf_reg_count =
-      ALIGN(brw->clip.prog_data->total_grf, 16) / 16 - 1;
-   /* reloc */
-   clip.thread0.kernel_start_pointer = brw->clip.prog_bo->offset >> 6;
-   clip.thread3.urb_entry_read_length = brw->clip.prog_data->urb_read_length;
-   clip.thread3.const_urb_entry_read_length = brw->clip.prog_data->curb_read_length;
-   clip.clip5.clip_mode = brw->clip.prog_data->clip_mode;
+   key->total_grf = brw->clip.prog_data->total_grf;
+   key->urb_entry_read_length = brw->clip.prog_data->urb_read_length;
+   key->curb_entry_read_length = brw->clip.prog_data->curb_read_length;
+   key->clip_mode = brw->clip.prog_data->clip_mode;
 
    /* BRW_NEW_CURBE_OFFSETS */
-   clip.thread3.const_urb_entry_read_offset = brw->curbe.clip_start * 2;
+   key->curbe_offset = brw->curbe.clip_start;
 
    /* BRW_NEW_URB_FENCE */
-   clip.thread4.nr_urb_entries = brw->urb.nr_clip_entries; 
-   clip.thread4.urb_entry_allocation_size = brw->urb.vsize - 1;
-   clip.thread4.max_threads = 1; /* 2 threads */
+   key->nr_urb_entries = brw->urb.nr_clip_entries;
+   key->urb_size = brw->urb.vsize;
+}
 
-   if (INTEL_DEBUG & DEBUG_STATS)
-      clip.thread4.stats_enable = 1; 
+static dri_bo *
+clip_unit_create_from_key(struct brw_context *brw,
+			  struct brw_clip_unit_key *key)
+{
+   struct brw_clip_unit_state clip;
+
+   memset(&clip, 0, sizeof(clip));
+
+   clip.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
+   /* reloc */
+   clip.thread0.kernel_start_pointer = brw->clip.prog_bo->offset >> 6;
 
-   /* CONSTANT */
    clip.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
    clip.thread1.single_program_flow = 1;
+
+   clip.thread3.urb_entry_read_length = key->urb_entry_read_length;
+   clip.thread3.const_urb_entry_read_length = key->curb_entry_read_length;
+   clip.thread3.const_urb_entry_read_offset = key->curbe_offset * 2;
    clip.thread3.dispatch_grf_start_reg = 1;
    clip.thread3.urb_entry_read_offset = 0;
+
+   clip.thread4.nr_urb_entries = key->nr_urb_entries;
+   clip.thread4.urb_entry_allocation_size = key->urb_size - 1;
+   clip.thread4.max_threads = 1; /* 2 threads */
+
+   if (INTEL_DEBUG & DEBUG_STATS)
+      clip.thread4.stats_enable = 1;
+
    clip.clip5.userclip_enable_flags = 0x7f;
    clip.clip5.userclip_must_clip = 1;
    clip.clip5.guard_band_enable = 0;
    clip.clip5.viewport_z_clip_enable = 1;
    clip.clip5.viewport_xy_clip_enable = 1;
    clip.clip5.vertex_position_space = BRW_CLIP_NDCSPACE;
-   clip.clip5.api_mode = BRW_CLIP_API_OGL;   
+   clip.clip5.api_mode = BRW_CLIP_API_OGL;
+   clip.clip5.clip_mode = key->clip_mode;
    clip.clip6.clipper_viewport_state_ptr = 0;
    clip.viewport_xmin = -1;
    clip.viewport_xmax = 1;
@@ -81,10 +107,27 @@ static void upload_clip_unit( struct brw_context *brw )
    clip.viewport_ymax = 1;
 
    brw->clip.thread0_delta = clip.thread0.grf_reg_count << 1;
+   return brw_upload_cache(&brw->cache, BRW_CLIP_UNIT,
+			   key, sizeof(*key),
+			   &brw->clip.prog_bo, 1,
+			   &clip, sizeof(clip),
+			   NULL, NULL);
+}
+
+static void upload_clip_unit( struct brw_context *brw )
+{
+   struct brw_clip_unit_key key;
+
+   clip_unit_populate_key(brw, &key);
 
    dri_bo_unreference(brw->clip.state_bo);
-   brw->clip.state_bo = brw_cache_data( &brw->cache, BRW_CLIP_UNIT, &clip,
-					&brw->clip.prog_bo, 1);
+   brw->clip.state_bo = brw_search_cache(&brw->cache, BRW_CLIP_UNIT,
+					 &key, sizeof(key),
+					 &brw->clip.prog_bo, 1,
+					 NULL);
+   if (brw->clip.state_bo == NULL) {
+      brw->clip.state_bo = clip_unit_create_from_key(brw, &key);
+   }
 }
 
 static void emit_reloc_clip_unit(struct brw_context *brw)
-- 
2.30.2