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    /* CACHE_NEW_GS_PROG */
  37    const struct brw_vec4_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(GEN6_GS_VECTOR_MASK_ENABLE |
  52                 brw->geometry_program->VerticesIn |
  53                 ((ALIGN(stage_state->sampler_count, 4)/4) <<
  54                  GEN6_GS_SAMPLER_COUNT_SHIFT) |
  55                 ((prog_data->base.binding_table.size_bytes / 4) <<
  56                  GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
  57
  58       if (brw->gs.prog_data->base.total_scratch) {
  59          OUT_RELOC64(stage_state->scratch_bo,
  60                      I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
  61                      ffs(brw->gs.prog_data->base.total_scratch) - 11);
  62          WARN_ONCE(true,
  63                    "May need to implement a temporary workaround: GS Number of "
  64                    "URB Entries must be less than or equal to the GS Maximum "
  65                    "Number of Threads.\n");
  66       } else {
  67          OUT_BATCH(0);
  68          OUT_BATCH(0);
  69       }
  70
  71       /* DW6 */
  72       OUT_BATCH(((brw->gs.prog_data->output_vertex_size_hwords * 2 - 1) <<
  73                  GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
  74                 (brw->gs.prog_data->output_topology <<
  75                  GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
  76                 (prog_data->urb_read_length <<
  77                  GEN6_GS_URB_READ_LENGTH_SHIFT) |
  78                 (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
  79                 (prog_data->dispatch_grf_start_reg <<
  80                  GEN6_GS_DISPATCH_START_GRF_SHIFT));
  81
  82       /* DW7 */
  83       OUT_BATCH(((brw->max_gs_threads / 2 - 1) << HSW_GS_MAX_THREADS_SHIFT) |
  84                 (brw->gs.prog_data->control_data_header_size_hwords <<
  85                  GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) |
  86                 (brw->gs.prog_data->dual_instanced_dispatch ?
  87                  GEN7_GS_DISPATCH_MODE_DUAL_INSTANCE :
  88                  GEN7_GS_DISPATCH_MODE_DUAL_OBJECT) |
  89                 GEN6_GS_STATISTICS_ENABLE |
  90                 (brw->gs.prog_data->include_primitive_id ?
  91                  GEN7_GS_INCLUDE_PRIMITIVE_ID : 0) |
  92                 GEN7_GS_REORDER_TRAILING |
  93                 GEN7_GS_ENABLE);
  94
  95       /* DW8 */
  96       OUT_BATCH(brw->gs.prog_data->control_data_format <<
  97                 HSW_GS_CONTROL_DATA_FORMAT_SHIFT);
  98
  99       /* DW9 / _NEW_TRANSFORM */
 100       OUT_BATCH((ctx->Transform.ClipPlanesEnabled <<
 101                  GEN8_GS_USER_CLIP_DISTANCE_SHIFT) |
 102                 (urb_entry_output_length << GEN8_GS_URB_OUTPUT_LENGTH_SHIFT) |
 103                 (urb_entry_write_offset <<
 104                  GEN8_GS_URB_ENTRY_OUTPUT_OFFSET_SHIFT));
 105       ADVANCE_BATCH();
 106    } else {
 107       BEGIN_BATCH(10);
 108       OUT_BATCH(_3DSTATE_GS << 16 | (10 - 2));
 109       OUT_BATCH(0); /* prog_bo */
 110       OUT_BATCH(0);
 111       OUT_BATCH(0);
 112       OUT_BATCH(0); /* scratch space base offset */
 113       OUT_BATCH(0);
 114       OUT_BATCH(0);
 115       OUT_BATCH(GEN6_GS_STATISTICS_ENABLE);
 116       OUT_BATCH(0);
 117       OUT_BATCH(0);
 118       ADVANCE_BATCH();
 119    }
 120 }
 121
 122 const struct brw_tracked_state gen8_gs_state = {
 123    .dirty = {
 124       .mesa  = _NEW_TRANSFORM,
 125       .brw   = (BRW_NEW_CONTEXT |
 126                 BRW_NEW_GEOMETRY_PROGRAM |
 127                 BRW_NEW_BATCH),
 128       .cache = CACHE_NEW_GS_PROG
 129    },
 130    .emit = gen8_upload_gs_state,
 131 };