src/mesa/drivers/dri/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
  33
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "brw_defines.h"
  37 #include "macros.h"
  38
  39 struct brw_vs_unit_key {
  40    unsigned int total_grf;
  41    unsigned int urb_entry_read_length;
  42    unsigned int curb_entry_read_length;
  43
  44    unsigned int curbe_offset;
  45
  46    unsigned int nr_urb_entries, urb_size;
  47 };
  48
  49 static void
  50 vs_unit_populate_key(struct brw_context *brw, struct brw_vs_unit_key *key)
  51 {
  52    memset(key, 0, sizeof(*key));
  53
  54    /* CACHE_NEW_VS_PROG */
  55    key->total_grf = brw->vs.prog_data->total_grf;
  56    key->urb_entry_read_length = brw->vs.prog_data->urb_read_length;
  57    key->curb_entry_read_length = brw->vs.prog_data->curb_read_length;
  58
  59    /* BRW_NEW_URB_FENCE */
  60    key->nr_urb_entries = brw->urb.nr_vs_entries;
  61    key->urb_size = brw->urb.vsize;
  62
  63    /* BRW_NEW_CURBE_OFFSETS, _NEW_TRANSFORM */
  64    if (brw->attribs.Transform->ClipPlanesEnabled) {
  65       /* Note that we read in the userclip planes as well, hence
  66        * clip_start:
  67        */
  68       key->curbe_offset = brw->curbe.clip_start;
  69    }
  70    else {
  71       key->curbe_offset = brw->curbe.vs_start;
  72    }
  73 }
  74
  75 static dri_bo *
  76 vs_unit_create_from_key(struct brw_context *brw, struct brw_vs_unit_key *key)
  77 {
  78    struct brw_vs_unit_state vs;
  79
  80    memset(&vs, 0, sizeof(vs));
  81
  82    vs.thread0.kernel_start_pointer = brw->vs.prog_bo->offset >> 6; /* reloc */
  83    vs.thread0.grf_reg_count = ALIGN(key->total_grf, 16) / 16 - 1;
  84    vs.thread1.floating_point_mode = BRW_FLOATING_POINT_NON_IEEE_754;
  85    vs.thread3.urb_entry_read_length = key->urb_entry_read_length;
  86    vs.thread3.const_urb_entry_read_length = key->curb_entry_read_length;
  87    vs.thread3.dispatch_grf_start_reg = 1;
  88    vs.thread3.urb_entry_read_offset = 0;
  89    vs.thread3.const_urb_entry_read_offset = key->curbe_offset * 2;
  90
  91    vs.thread4.nr_urb_entries = key->nr_urb_entries;
  92    vs.thread4.urb_entry_allocation_size = key->urb_size - 1;
  93    vs.thread4.max_threads = MIN2(MAX2(0, (key->nr_urb_entries - 6) / 2 - 1),
  94                                  15);
  95
  96    if (INTEL_DEBUG & DEBUG_SINGLE_THREAD)
  97       vs.thread4.max_threads = 0;
  98
  99    /* No samplers for ARB_vp programs:
 100     */
 101    vs.vs5.sampler_count = 0;
 102
 103    if (INTEL_DEBUG & DEBUG_STATS)
 104       vs.thread4.stats_enable = 1;
 105
 106    /* Vertex program always enabled:
 107     */
 108    vs.vs6.vs_enable = 1;
 109
 110    brw->vs.thread0_delta = vs.thread0.grf_reg_count << 1;
 111    return brw_upload_cache(&brw->cache, BRW_VS_UNIT,
 112                            key, sizeof(*key),
 113                            &brw->vs.prog_bo, 1,
 114                            &vs, sizeof(vs),
 115                            NULL, NULL);
 116 }
 117
 118 static void upload_vs_unit( struct brw_context *brw )
 119 {
 120    struct brw_vs_unit_key key;
 121
 122    vs_unit_populate_key(brw, &key);
 123
 124    dri_bo_unreference(brw->vs.state_bo);
 125    brw->vs.state_bo = brw_search_cache(&brw->cache, BRW_VS_UNIT,
 126                                        &key, sizeof(key),
 127                                        &brw->vs.prog_bo, 1,
 128                                        NULL);
 129    if (brw->vs.state_bo == NULL) {
 130       brw->vs.state_bo = vs_unit_create_from_key(brw, &key);
 131    }
 132 }
 133
 134 static void emit_reloc_vs_unit(struct brw_context *brw)
 135 {
 136    /* Emit VS program relocation */
 137    dri_emit_reloc(brw->vs.state_bo,
 138                   DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
 139                   brw->vs.thread0_delta,
 140                   offsetof(struct brw_vs_unit_state, thread0),
 141                   brw->vs.prog_bo);
 142 }
 143
 144 const struct brw_tracked_state brw_vs_unit = {
 145    .dirty = {
 146       .mesa  = _NEW_TRANSFORM,
 147       .brw   = (BRW_NEW_CURBE_OFFSETS |
 148                 BRW_NEW_URB_FENCE),
 149       .cache = CACHE_NEW_VS_PROG
 150    },
 151    .update = upload_vs_unit,
 152    .emit_reloc = emit_reloc_vs_unit,
 153 };