src/gallium/drivers/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 #include "util/u_math.h"
  33
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "brw_defines.h"
  37 #include "brw_debug.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 enum pipe_error
  73 gs_unit_create_from_key(struct brw_context *brw,
  74                         struct brw_gs_unit_key *key,
  75                         struct brw_winsys_reloc *reloc,
  76                         unsigned nr_reloc,
  77                         struct brw_winsys_buffer **bo_out)
  78 {
  79    struct brw_gs_unit_state gs;
  80    enum pipe_error ret;
  81
  82
  83    memset(&gs, 0, sizeof(gs));
  84
  85    /* reloc */
  86    gs.thread0.grf_reg_count = align(key->total_grf, 16) / 16 - 1;
  87    gs.thread0.kernel_start_pointer = 0;
  88
  89    gs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  90    gs.thread1.single_program_flow = 1;
  91
  92    gs.thread3.dispatch_grf_start_reg = 1;
  93    gs.thread3.const_urb_entry_read_offset = 0;
  94    gs.thread3.const_urb_entry_read_length = 0;
  95    gs.thread3.urb_entry_read_offset = 0;
  96    gs.thread3.urb_entry_read_length = key->urb_entry_read_length;
  97
  98    gs.thread4.nr_urb_entries = key->nr_urb_entries;
  99    gs.thread4.urb_entry_allocation_size = key->urb_size - 1;
 100
 101    if (key->nr_urb_entries >= 8)
 102       gs.thread4.max_threads = 1;
 103    else
 104       gs.thread4.max_threads = 0;
 105
 106    if (BRW_IS_IGDNG(brw))
 107       gs.thread4.rendering_enable = 1;
 108
 109    if (BRW_DEBUG & DEBUG_STATS)
 110       gs.thread4.stats_enable = 1;
 111
 112    ret = brw_upload_cache(&brw->cache, BRW_GS_UNIT,
 113                           key, sizeof(*key),
 114                           reloc, nr_reloc,
 115                           &gs, sizeof(gs),
 116                           NULL, NULL,
 117                           bo_out);
 118    if (ret)
 119       return ret;
 120
 121    return PIPE_OK;
 122 }
 123
 124 static enum pipe_error prepare_gs_unit(struct brw_context *brw)
 125 {
 126    struct brw_gs_unit_key key;
 127    enum pipe_error ret;
 128    struct brw_winsys_reloc reloc[1];
 129    unsigned nr_reloc = 0;
 130    unsigned grf_reg_count;
 131
 132    gs_unit_populate_key(brw, &key);
 133
 134    grf_reg_count = (align(key.total_grf, 16) / 16 - 1);
 135
 136    /* GS program relocation */
 137    if (key.prog_active) {
 138       make_reloc(&reloc[nr_reloc++],
 139                  BRW_USAGE_STATE,
 140                  grf_reg_count << 1,
 141                  offsetof(struct brw_gs_unit_state, thread0),
 142                  brw->gs.prog_bo);
 143    }
 144
 145    if (brw_search_cache(&brw->cache, BRW_GS_UNIT,
 146                         &key, sizeof(key),
 147                         reloc, nr_reloc,
 148                         NULL,
 149                         &brw->gs.state_bo))
 150       return PIPE_OK;
 151
 152    ret = gs_unit_create_from_key(brw, &key,
 153                                  reloc, nr_reloc,
 154                                  &brw->gs.state_bo);
 155    if (ret)
 156       return ret;
 157
 158    return PIPE_OK;
 159 }
 160
 161 const struct brw_tracked_state brw_gs_unit = {
 162    .dirty = {
 163       .mesa  = 0,
 164       .brw   = (BRW_NEW_CURBE_OFFSETS |
 165                 BRW_NEW_URB_FENCE),
 166       .cache = CACHE_NEW_GS_PROG
 167    },
 168    .prepare = prepare_gs_unit,
 169 };