src/mesa/drivers/dri/i965/gen8_gs_state.c

   1 /*
   2  * Copyright © 2013 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_context.h"
  25 #include "brw_state.h"
  26 #include "brw_defines.h"
  27 #include "intel_batchbuffer.h"
  28
  29 static void
  30 gen8_upload_gs_state(struct brw_context *brw)
  31 {
  32    struct gl_context *ctx = &brw->ctx;
  33    const struct brw_stage_state *stage_state = &brw->gs.base;
  34    /* BRW_NEW_GEOMETRY_PROGRAM */
  35    bool active = brw->geometry_program;
  36    /* BRW_NEW_GS_PROG_DATA */
  37    const struct brw_vue_prog_data *prog_data = &brw->gs.prog_data->base;
  38
  39    if (active) {
  40       int urb_entry_write_offset = 1;
  41       uint32_t urb_entry_output_length =
  42          ((prog_data->vue_map.num_slots + 1) / 2 - urb_entry_write_offset);
  43
  44       if (urb_entry_output_length == 0)
  45          urb_entry_output_length = 1;
  46
  47       BEGIN_BATCH(10);
  48       OUT_BATCH(_3DSTATE_GS << 16 | (10 - 2));
  49       OUT_BATCH(stage_state->prog_offset);
  50       OUT_BATCH(0);
  51       OUT_BATCH(brw->geometry_program->VerticesIn |
  52                 ((ALIGN(stage_state->sampler_count, 4)/4) <<
  53                  GEN6_GS_SAMPLER_COUNT_SHIFT) |
  54                 ((prog_data->base.binding_table.size_bytes / 4) <<
  55                  GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
  56
  57       if (brw->gs.prog_data->base.base.total_scratch) {
  58          OUT_RELOC64(stage_state->scratch_bo,
  59                      I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
  60                      ffs(brw->gs.prog_data->base.base.total_scratch) - 11);
  61       } else {
  62          OUT_BATCH(0);
  63          OUT_BATCH(0);
  64       }
  65
  66       /* DW6 */
  67       OUT_BATCH(((brw->gs.prog_data->output_vertex_size_hwords * 2 - 1) <<
  68                  GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
  69                 (brw->gs.prog_data->output_topology <<
  70                  GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
  71                 (prog_data->urb_read_length <<
  72                  GEN6_GS_URB_READ_LENGTH_SHIFT) |
  73                 (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
  74                 (prog_data->base.dispatch_grf_start_reg <<
  75                  GEN6_GS_DISPATCH_START_GRF_SHIFT));
  76
  77       uint32_t dw7 = (brw->gs.prog_data->control_data_header_size_hwords <<
  78                       GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) |
  79                      SET_FIELD(prog_data->dispatch_mode,
  80                                GEN7_GS_DISPATCH_MODE) |
  81                      ((brw->gs.prog_data->invocations - 1) <<
  82                       GEN7_GS_INSTANCE_CONTROL_SHIFT) |
  83                       GEN6_GS_STATISTICS_ENABLE |
  84                       (brw->gs.prog_data->include_primitive_id ?
  85                        GEN7_GS_INCLUDE_PRIMITIVE_ID : 0) |
  86                       GEN7_GS_REORDER_TRAILING |
  87                       GEN7_GS_ENABLE;
  88       uint32_t dw8 = brw->gs.prog_data->control_data_format <<
  89                      HSW_GS_CONTROL_DATA_FORMAT_SHIFT;
  90
  91       if (brw->gen < 9)
  92          dw7 |= (brw->max_gs_threads / 2 - 1) << HSW_GS_MAX_THREADS_SHIFT;
  93       else
  94          dw8 |= brw->max_gs_threads - 1;
  95
  96       /* DW7 */
  97       OUT_BATCH(dw7);
  98
  99       /* DW8 */
 100       OUT_BATCH(dw8);
 101
 102       /* DW9 / _NEW_TRANSFORM */
 103       OUT_BATCH((ctx->Transform.ClipPlanesEnabled <<
 104                  GEN8_GS_USER_CLIP_DISTANCE_SHIFT) |
 105                 (urb_entry_output_length << GEN8_GS_URB_OUTPUT_LENGTH_SHIFT) |
 106                 (urb_entry_write_offset <<
 107                  GEN8_GS_URB_ENTRY_OUTPUT_OFFSET_SHIFT));
 108       ADVANCE_BATCH();
 109    } else {
 110       BEGIN_BATCH(10);
 111       OUT_BATCH(_3DSTATE_GS << 16 | (10 - 2));
 112       OUT_BATCH(0); /* prog_bo */
 113       OUT_BATCH(0);
 114       OUT_BATCH(0);
 115       OUT_BATCH(0); /* scratch space base offset */
 116       OUT_BATCH(0);
 117       OUT_BATCH(0);
 118       OUT_BATCH(GEN6_GS_STATISTICS_ENABLE);
 119       OUT_BATCH(0);
 120       OUT_BATCH(0);
 121       ADVANCE_BATCH();
 122    }
 123 }
 124
 125 const struct brw_tracked_state gen8_gs_state = {
 126    .dirty = {
 127       .mesa  = _NEW_TRANSFORM,
 128       .brw   = BRW_NEW_BATCH |
 129                BRW_NEW_CONTEXT |
 130                BRW_NEW_GEOMETRY_PROGRAM |
 131                BRW_NEW_GS_PROG_DATA,
 132    },
 133    .emit = gen8_upload_gs_state,
 134 };