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
  38 struct brw_gs_unit_key {
  39    unsigned int total_grf;
  40    unsigned int urb_entry_read_length;
  41
  42    unsigned int curbe_offset;
  43
  44    unsigned int nr_urb_entries, urb_size;
  45    GLboolean prog_active;
  46 };
  47
  48 static void
  49 gs_unit_populate_key(struct brw_context *brw, struct brw_gs_unit_key *key)
  50 {
  51    memset(key, 0, sizeof(*key));
  52
  53    /* CACHE_NEW_GS_PROG */
  54    key->prog_active = brw->gs.prog_active;
  55    if (key->prog_active) {
  56       key->total_grf = brw->gs.prog_data->total_grf;
  57       key->urb_entry_read_length = brw->gs.prog_data->urb_read_length;
  58    } else {
  59       key->total_grf = 1;
  60       key->urb_entry_read_length = 1;
  61    }
  62
  63    /* BRW_NEW_CURBE_OFFSETS */
  64    key->curbe_offset = brw->curbe.clip_start;
  65
  66    /* BRW_NEW_URB_FENCE */
  67    key->nr_urb_entries = brw->urb.nr_gs_entries;
  68    key->urb_size = brw->urb.vsize;
  69 }
  70
  71 static drm_intel_bo *
  72 gs_unit_create_from_key(struct brw_context *brw, struct brw_gs_unit_key *key)
  73 {
  74    struct intel_context *intel = &brw->intel;
  75    struct brw_gs_unit_state gs;
  76    drm_intel_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    if (key->nr_urb_entries >= 8)
  97       gs.thread4.max_threads = 1;
  98    else
  99       gs.thread4.max_threads = 0;
 100
 101    if (intel->gen == 5)
 102       gs.thread4.rendering_enable = 1;
 103
 104    if (unlikely(INTEL_DEBUG & DEBUG_STATS))
 105       gs.thread4.stats_enable = 1;
 106
 107    bo = brw_upload_cache(&brw->cache, BRW_GS_UNIT,
 108                          key, sizeof(*key),
 109                          &brw->gs.prog_bo, 1,
 110                          &gs, sizeof(gs));
 111
 112    if (key->prog_active) {
 113       /* Emit GS program relocation */
 114       drm_intel_bo_emit_reloc(bo, offsetof(struct brw_gs_unit_state, thread0),
 115                               brw->gs.prog_bo, gs.thread0.grf_reg_count << 1,
 116                               I915_GEM_DOMAIN_INSTRUCTION, 0);
 117    }
 118
 119    return bo;
 120 }
 121
 122 static void prepare_gs_unit(struct brw_context *brw)
 123 {
 124    struct brw_gs_unit_key key;
 125
 126    gs_unit_populate_key(brw, &key);
 127
 128    drm_intel_bo_unreference(brw->gs.state_bo);
 129    brw->gs.state_bo = brw_search_cache(&brw->cache, BRW_GS_UNIT,
 130                                        &key, sizeof(key),
 131                                        &brw->gs.prog_bo, 1,
 132                                        NULL);
 133    if (brw->gs.state_bo == NULL) {
 134       brw->gs.state_bo = gs_unit_create_from_key(brw, &key);
 135    }
 136 }
 137
 138 const struct brw_tracked_state brw_gs_unit = {
 139    .dirty = {
 140       .mesa  = 0,
 141       .brw   = (BRW_NEW_CURBE_OFFSETS |
 142                 BRW_NEW_URB_FENCE),
 143       .cache = CACHE_NEW_GS_PROG
 144    },
 145    .prepare = prepare_gs_unit,
 146 };