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

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32
  33
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "brw_defines.h"
  37 #include "main/macros.h"
  38
  39 struct brw_gs_unit_key {
  40    unsigned int total_grf;
  41    unsigned int urb_entry_read_length;
  42
  43    unsigned int curbe_offset;
  44
  45    unsigned int nr_urb_entries, urb_size;
  46    GLboolean prog_active;
  47 };
  48
  49 static void
  50 gs_unit_populate_key(struct brw_context *brw, struct brw_gs_unit_key *key)
  51 {
  52    memset(key, 0, sizeof(*key));
  53
  54    /* CACHE_NEW_GS_PROG */
  55    key->prog_active = brw->gs.prog_active;
  56    if (key->prog_active) {
  57       key->total_grf = brw->gs.prog_data->total_grf;
  58       key->urb_entry_read_length = brw->gs.prog_data->urb_read_length;
  59    } else {
  60       key->total_grf = 1;
  61       key->urb_entry_read_length = 1;
  62    }
  63
  64    /* BRW_NEW_CURBE_OFFSETS */
  65    key->curbe_offset = brw->curbe.clip_start;
  66
  67    /* BRW_NEW_URB_FENCE */
  68    key->nr_urb_entries = brw->urb.nr_gs_entries;
  69    key->urb_size = brw->urb.vsize;
  70 }
  71
  72 static dri_bo *
  73 gs_unit_create_from_key(struct brw_context *brw, struct brw_gs_unit_key *key)
  74 {
  75    struct intel_context *intel = &brw->intel;
  76    struct brw_gs_unit_state gs;
  77    dri_bo *bo;
  78
  79    memset(&gs, 0, sizeof(gs));
  80
  81    gs.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
  82    if (key->prog_active) /* reloc */
  83       gs.thread0.kernel_start_pointer = brw->gs.prog_bo->offset >> 6;
  84
  85    gs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  86    gs.thread1.single_program_flow = 1;
  87
  88    gs.thread3.dispatch_grf_start_reg = 1;
  89    gs.thread3.const_urb_entry_read_offset = 0;
  90    gs.thread3.const_urb_entry_read_length = 0;
  91    gs.thread3.urb_entry_read_offset = 0;
  92    gs.thread3.urb_entry_read_length = key->urb_entry_read_length;
  93
  94    gs.thread4.nr_urb_entries = key->nr_urb_entries;
  95    gs.thread4.urb_entry_allocation_size = key->urb_size - 1;
  96
  97    if (key->nr_urb_entries >= 8)
  98       gs.thread4.max_threads = 1;
  99    else
 100       gs.thread4.max_threads = 0;
 101
 102    if (intel->is_ironlake)
 103       gs.thread4.rendering_enable = 1;
 104
 105    if (INTEL_DEBUG & DEBUG_STATS)
 106       gs.thread4.stats_enable = 1;
 107
 108    bo = brw_upload_cache(&brw->cache, BRW_GS_UNIT,
 109                          key, sizeof(*key),
 110                          &brw->gs.prog_bo, 1,
 111                          &gs, sizeof(gs),
 112                          NULL, NULL);
 113
 114    if (key->prog_active) {
 115       /* Emit GS program relocation */
 116       dri_bo_emit_reloc(bo,
 117                         I915_GEM_DOMAIN_INSTRUCTION, 0,
 118                         gs.thread0.grf_reg_count << 1,
 119                         offsetof(struct brw_gs_unit_state, thread0),
 120                         brw->gs.prog_bo);
 121    }
 122
 123    return bo;
 124 }
 125
 126 static void prepare_gs_unit(struct brw_context *brw)
 127 {
 128    struct brw_gs_unit_key key;
 129
 130    gs_unit_populate_key(brw, &key);
 131
 132    dri_bo_unreference(brw->gs.state_bo);
 133    brw->gs.state_bo = brw_search_cache(&brw->cache, BRW_GS_UNIT,
 134                                        &key, sizeof(key),
 135                                        &brw->gs.prog_bo, 1,
 136                                        NULL);
 137    if (brw->gs.state_bo == NULL) {
 138       brw->gs.state_bo = gs_unit_create_from_key(brw, &key);
 139    }
 140 }
 141
 142 const struct brw_tracked_state brw_gs_unit = {
 143    .dirty = {
 144       .mesa  = 0,
 145       .brw   = (BRW_NEW_CURBE_OFFSETS |
 146                 BRW_NEW_URB_FENCE),
 147       .cache = CACHE_NEW_GS_PROG
 148    },
 149    .prepare = prepare_gs_unit,
 150 };