src/gallium/drivers/i965/brw_vs_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
  35 #include "brw_debug.h"
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38 #include "brw_defines.h"
  39
  40 struct brw_vs_unit_key {
  41    unsigned int total_grf;
  42    unsigned int urb_entry_read_length;
  43    unsigned int curb_entry_read_length;
  44
  45    unsigned int curbe_offset;
  46
  47    unsigned int nr_urb_entries, urb_size;
  48
  49    unsigned int nr_surfaces;
  50 };
  51
  52 static void
  53 vs_unit_populate_key(struct brw_context *brw, struct brw_vs_unit_key *key)
  54 {
  55    memset(key, 0, sizeof(*key));
  56
  57    /* CACHE_NEW_VS_PROG */
  58    key->total_grf = brw->vs.prog_data->total_grf;
  59    key->urb_entry_read_length = brw->vs.prog_data->urb_read_length;
  60    key->curb_entry_read_length = brw->vs.prog_data->curb_read_length;
  61
  62    /* BRW_NEW_URB_FENCE */
  63    key->nr_urb_entries = brw->urb.nr_vs_entries;
  64    key->urb_size = brw->urb.vsize;
  65
  66    /* BRW_NEW_NR_VS_SURFACES */
  67    key->nr_surfaces = brw->vs.nr_surfaces;
  68
  69    /* PIPE_NEW_CLIP */
  70    if (brw->curr.ucp.nr) {
  71       /* Note that we read in the userclip planes as well, hence
  72        * clip_start:
  73        */
  74       key->curbe_offset = brw->curbe.clip_start;
  75    }
  76    else {
  77       key->curbe_offset = brw->curbe.vs_start;
  78    }
  79 }
  80
  81 static struct brw_winsys_buffer *
  82 vs_unit_create_from_key(struct brw_context *brw, struct brw_vs_unit_key *key)
  83 {
  84    struct brw_vs_unit_state vs;
  85    struct brw_winsys_buffer *bo;
  86    int chipset_max_threads;
  87
  88    memset(&vs, 0, sizeof(vs));
  89
  90    vs.thread0.kernel_start_pointer = brw->vs.prog_bo->offset[0] >> 6; /* reloc */
  91    vs.thread0.grf_reg_count = align(key->total_grf, 16) / 16 - 1;
  92    vs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  93    /* Choosing multiple program flow means that we may get 2-vertex threads,
  94     * which will have the channel mask for dwords 4-7 enabled in the thread,
  95     * and those dwords will be written to the second URB handle when we
  96     * brw_urb_WRITE() results.
  97     */
  98    vs.thread1.single_program_flow = 0;
  99
 100    if (BRW_IS_IGDNG(brw))
 101       vs.thread1.binding_table_entry_count = 0; /* hardware requirement */
 102    else
 103       vs.thread1.binding_table_entry_count = key->nr_surfaces;
 104
 105    vs.thread3.urb_entry_read_length = key->urb_entry_read_length;
 106    vs.thread3.const_urb_entry_read_length = key->curb_entry_read_length;
 107    vs.thread3.dispatch_grf_start_reg = 1;
 108    vs.thread3.urb_entry_read_offset = 0;
 109    vs.thread3.const_urb_entry_read_offset = key->curbe_offset * 2;
 110
 111    if (BRW_IS_IGDNG(brw))
 112        vs.thread4.nr_urb_entries = key->nr_urb_entries >> 2;
 113    else
 114        vs.thread4.nr_urb_entries = key->nr_urb_entries;
 115
 116    vs.thread4.urb_entry_allocation_size = key->urb_size - 1;
 117
 118    if (BRW_IS_IGDNG(brw))
 119       chipset_max_threads = 72;
 120    else if (BRW_IS_G4X(brw))
 121       chipset_max_threads = 32;
 122    else
 123       chipset_max_threads = 16;
 124
 125    vs.thread4.max_threads = CLAMP(key->nr_urb_entries / 2,
 126                                   1, chipset_max_threads) - 1;
 127
 128    if (BRW_DEBUG & DEBUG_SINGLE_THREAD)
 129       vs.thread4.max_threads = 0;
 130
 131    /* No samplers for ARB_vp programs:
 132     */
 133    /* It has to be set to 0 for IGDNG
 134     */
 135    vs.vs5.sampler_count = 0;
 136
 137    if (BRW_DEBUG & DEBUG_STATS)
 138       vs.thread4.stats_enable = 1;
 139
 140    /* Vertex program always enabled:
 141     */
 142    vs.vs6.vs_enable = 1;
 143
 144    bo = brw_upload_cache(&brw->cache, BRW_VS_UNIT,
 145                          key, sizeof(*key),
 146                          &brw->vs.prog_bo, 1,
 147                          &vs, sizeof(vs),
 148                          NULL, NULL);
 149
 150    /* Emit VS program relocation */
 151    brw->sws->bo_emit_reloc(bo,
 152                            BRW_USAGE_STATE,
 153                            vs.thread0.grf_reg_count << 1,
 154                            offsetof(struct brw_vs_unit_state, thread0),
 155                            brw->vs.prog_bo);
 156
 157    return bo;
 158 }
 159
 160 static int prepare_vs_unit(struct brw_context *brw)
 161 {
 162    struct brw_vs_unit_key key;
 163
 164    vs_unit_populate_key(brw, &key);
 165
 166    brw->sws->bo_unreference(brw->vs.state_bo);
 167    brw->vs.state_bo = brw_search_cache(&brw->cache, BRW_VS_UNIT,
 168                                        &key, sizeof(key),
 169                                        &brw->vs.prog_bo, 1,
 170                                        NULL);
 171    if (brw->vs.state_bo == NULL) {
 172       brw->vs.state_bo = vs_unit_create_from_key(brw, &key);
 173    }
 174
 175    return 0;
 176 }
 177
 178 const struct brw_tracked_state brw_vs_unit = {
 179    .dirty = {
 180       .mesa  = (PIPE_NEW_CLIP),
 181       .brw   = (BRW_NEW_CURBE_OFFSETS |
 182                 BRW_NEW_NR_VS_SURFACES |
 183                 BRW_NEW_URB_FENCE),
 184       .cache = CACHE_NEW_VS_PROG
 185    },
 186    .prepare = prepare_vs_unit,
 187 };