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    const struct gen_device_info *devinfo = &brw->screen->devinfo;
  33    struct gl_context *ctx = &brw->ctx;
  34    const struct brw_stage_state *stage_state = &brw->gs.base;
  35    /* BRW_NEW_GEOMETRY_PROGRAM */
  36    bool active = brw->geometry_program;
  37    /* BRW_NEW_GS_PROG_DATA */
  38    const struct brw_stage_prog_data *prog_data = stage_state->prog_data;
  39    const struct brw_vue_prog_data *vue_prog_data =
  40       brw_vue_prog_data(stage_state->prog_data);
  41    const struct brw_gs_prog_data *gs_prog_data =
  42       brw_gs_prog_data(stage_state->prog_data);
  43
  44    if (active) {
  45       int urb_entry_write_offset = 1;
  46       uint32_t urb_entry_output_length =
  47          ((vue_prog_data->vue_map.num_slots + 1) / 2 - urb_entry_write_offset);
  48
  49       if (urb_entry_output_length == 0)
  50          urb_entry_output_length = 1;
  51
  52       BEGIN_BATCH(10);
  53       OUT_BATCH(_3DSTATE_GS << 16 | (10 - 2));
  54       OUT_BATCH(stage_state->prog_offset);
  55       OUT_BATCH(0);
  56       OUT_BATCH(gs_prog_data->vertices_in |
  57                 ((ALIGN(stage_state->sampler_count, 4)/4) <<
  58                  GEN6_GS_SAMPLER_COUNT_SHIFT) |
  59                 ((prog_data->binding_table.size_bytes / 4) <<
  60                  GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
  61
  62       if (prog_data->total_scratch) {
  63          OUT_RELOC64(stage_state->scratch_bo,
  64                      I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
  65                      ffs(stage_state->per_thread_scratch) - 11);
  66       } else {
  67          OUT_BATCH(0);
  68          OUT_BATCH(0);
  69       }
  70
  71       /* DW6 */
  72       OUT_BATCH(((gs_prog_data->output_vertex_size_hwords * 2 - 1) <<
  73                  GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
  74                 (gs_prog_data->output_topology <<
  75                  GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
  76                 (vue_prog_data->include_vue_handles ?
  77                  GEN7_GS_INCLUDE_VERTEX_HANDLES : 0) |
  78                 (vue_prog_data->urb_read_length <<
  79                  GEN6_GS_URB_READ_LENGTH_SHIFT) |
  80                 (0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
  81                 (prog_data->dispatch_grf_start_reg <<
  82                  GEN6_GS_DISPATCH_START_GRF_SHIFT));
  83
  84       uint32_t dw7 = (gs_prog_data->control_data_header_size_hwords <<
  85                       GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) |
  86                      SET_FIELD(vue_prog_data->dispatch_mode,
  87                                GEN7_GS_DISPATCH_MODE) |
  88                      ((gs_prog_data->invocations - 1) <<
  89                       GEN7_GS_INSTANCE_CONTROL_SHIFT) |
  90                       GEN6_GS_STATISTICS_ENABLE |
  91                       (gs_prog_data->include_primitive_id ?
  92                        GEN7_GS_INCLUDE_PRIMITIVE_ID : 0) |
  93                       GEN7_GS_REORDER_TRAILING |
  94                       GEN7_GS_ENABLE;
  95       uint32_t dw8 = gs_prog_data->control_data_format <<
  96                      HSW_GS_CONTROL_DATA_FORMAT_SHIFT;
  97
  98       if (gs_prog_data->static_vertex_count != -1) {
  99          dw8 |= GEN8_GS_STATIC_OUTPUT |
 100                 SET_FIELD(gs_prog_data->static_vertex_count,
 101                           GEN8_GS_STATIC_VERTEX_COUNT);
 102       }
 103
 104       if (brw->gen < 9)
 105          dw7 |= (devinfo->max_gs_threads / 2 - 1) << HSW_GS_MAX_THREADS_SHIFT;
 106       else
 107          dw8 |= devinfo->max_gs_threads - 1;
 108
 109       /* DW7 */
 110       OUT_BATCH(dw7);
 111
 112       /* DW8 */
 113       OUT_BATCH(dw8);
 114
 115       /* DW9 / _NEW_TRANSFORM */
 116       OUT_BATCH((vue_prog_data->cull_distance_mask |
 117                  ctx->Transform.ClipPlanesEnabled <<
 118                  GEN8_GS_USER_CLIP_DISTANCE_SHIFT) |
 119                 (urb_entry_output_length << GEN8_GS_URB_OUTPUT_LENGTH_SHIFT) |
 120                 (urb_entry_write_offset <<
 121                  GEN8_GS_URB_ENTRY_OUTPUT_OFFSET_SHIFT));
 122       ADVANCE_BATCH();
 123    } else {
 124       BEGIN_BATCH(10);
 125       OUT_BATCH(_3DSTATE_GS << 16 | (10 - 2));
 126       OUT_BATCH(0); /* prog_bo */
 127       OUT_BATCH(0);
 128       OUT_BATCH(0);
 129       OUT_BATCH(0); /* scratch space base offset */
 130       OUT_BATCH(0);
 131       OUT_BATCH(0);
 132       OUT_BATCH(GEN6_GS_STATISTICS_ENABLE);
 133       OUT_BATCH(0);
 134       OUT_BATCH(0);
 135       ADVANCE_BATCH();
 136    }
 137 }
 138
 139 const struct brw_tracked_state gen8_gs_state = {
 140    .dirty = {
 141       .mesa  = _NEW_TRANSFORM,
 142       .brw   = BRW_NEW_BATCH |
 143                BRW_NEW_BLORP |
 144                BRW_NEW_CONTEXT |
 145                BRW_NEW_GEOMETRY_PROGRAM |
 146                BRW_NEW_GS_PROG_DATA,
 147    },
 148    .emit = gen8_upload_gs_state,
 149 };