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 "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 brw_gs_unit_state gs;
  76    dri_bo *bo;
  77
  78    memset(&gs, 0, sizeof(gs));
  79
  80    gs.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
  81    if (key->prog_active) /* reloc */
  82       gs.thread0.kernel_start_pointer = brw->gs.prog_bo->offset >> 6;
  83
  84    gs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  85    gs.thread1.single_program_flow = 1;
  86
  87    gs.thread3.dispatch_grf_start_reg = 1;
  88    gs.thread3.const_urb_entry_read_offset = 0;
  89    gs.thread3.const_urb_entry_read_length = 0;
  90    gs.thread3.urb_entry_read_offset = 0;
  91    gs.thread3.urb_entry_read_length = key->urb_entry_read_length;
  92
  93    gs.thread4.nr_urb_entries = key->nr_urb_entries;
  94    gs.thread4.urb_entry_allocation_size = key->urb_size - 1;
  95
  96    gs.thread4.max_threads = 0; /* Hardware requirement */
  97
  98    if (INTEL_DEBUG & DEBUG_STATS)
  99       gs.thread4.stats_enable = 1;
 100
 101    bo = brw_upload_cache(&brw->cache, BRW_GS_UNIT,
 102                          key, sizeof(*key),
 103                          &brw->gs.prog_bo, 1,
 104                          &gs, sizeof(gs),
 105                          NULL, NULL);
 106
 107    if (key->prog_active) {
 108       /* Emit GS program relocation */
 109       dri_emit_reloc(bo,
 110                      DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
 111                      gs.thread0.grf_reg_count << 1,
 112                      offsetof(struct brw_gs_unit_state, thread0),
 113                      brw->gs.prog_bo);
 114    }
 115
 116    return bo;
 117 }
 118
 119 static int prepare_gs_unit( struct brw_context *brw )
 120 {
 121    struct brw_gs_unit_key key;
 122
 123    gs_unit_populate_key(brw, &key);
 124
 125    dri_bo_unreference(brw->gs.state_bo);
 126    brw->gs.state_bo = brw_search_cache(&brw->cache, BRW_GS_UNIT,
 127                                        &key, sizeof(key),
 128                                        &brw->gs.prog_bo, 1,
 129                                        NULL);
 130    if (brw->gs.state_bo == NULL) {
 131       brw->gs.state_bo = gs_unit_create_from_key(brw, &key);
 132    }
 133    return dri_bufmgr_check_aperture_space(brw->gs.state_bo);
 134 }
 135
 136 const struct brw_tracked_state brw_gs_unit = {
 137    .dirty = {
 138       .mesa  = 0,
 139       .brw   = (BRW_NEW_CURBE_OFFSETS |
 140                 BRW_NEW_URB_FENCE),
 141       .cache = CACHE_NEW_GS_PROG
 142    },
 143    .prepare = prepare_gs_unit,
 144 };