src/mesa/drivers/dri/i965/gen7_vs_state.c

   1 /*
   2  * Copyright © 2011 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "brw_context.h"
  25 #include "brw_state.h"
  26 #include "brw_defines.h"
  27 #include "brw_util.h"
  28 #include "program/prog_parameter.h"
  29 #include "program/prog_statevars.h"
  30 #include "intel_batchbuffer.h"
  31
  32 static void
  33 upload_vs_state(struct brw_context *brw)
  34 {
  35    struct intel_context *intel = &brw->intel;
  36    uint32_t floating_point_mode = 0;
  37
  38    BEGIN_BATCH(2);
  39    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS_VS << 16 | (2 - 2));
  40    OUT_BATCH(brw->vs.bind_bo_offset);
  41    ADVANCE_BATCH();
  42
  43    if (brw->vs.push_const_size == 0) {
  44       /* Disable the push constant buffers. */
  45       BEGIN_BATCH(7);
  46       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (7 - 2));
  47       OUT_BATCH(0);
  48       OUT_BATCH(0);
  49       OUT_BATCH(0);
  50       OUT_BATCH(0);
  51       OUT_BATCH(0);
  52       OUT_BATCH(0);
  53       ADVANCE_BATCH();
  54    } else {
  55       BEGIN_BATCH(7);
  56       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (7 - 2));
  57       OUT_BATCH(brw->vs.push_const_size);
  58       OUT_BATCH(0);
  59       /* Pointer to the VS constant buffer.  Covered by the set of
  60        * state flags from gen6_prepare_wm_contants
  61        */
  62       OUT_BATCH(brw->vs.push_const_offset);
  63       OUT_BATCH(0);
  64       OUT_BATCH(0);
  65       OUT_BATCH(0);
  66       ADVANCE_BATCH();
  67    }
  68
  69    /* Use ALT floating point mode for ARB vertex programs, because they
  70     * require 0^0 == 1.
  71     */
  72    if (intel->ctx.Shader.CurrentVertexProgram == NULL)
  73       floating_point_mode = GEN6_VS_FLOATING_POINT_MODE_ALT;
  74
  75    BEGIN_BATCH(6);
  76    OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2));
  77    OUT_BATCH(brw->vs.prog_offset);
  78    OUT_BATCH((0 << GEN6_VS_SAMPLER_COUNT_SHIFT) | floating_point_mode);
  79
  80    if (brw->vs.prog_data->total_scratch) {
  81       OUT_RELOC(brw->vs.scratch_bo,
  82                 I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
  83                 ffs(brw->vs.prog_data->total_scratch) - 11);
  84    } else {
  85       OUT_BATCH(0);
  86    }
  87
  88    OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
  89              (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
  90              (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
  91
  92    OUT_BATCH(((brw->max_vs_threads - 1) << GEN6_VS_MAX_THREADS_SHIFT) |
  93              GEN6_VS_STATISTICS_ENABLE |
  94              GEN6_VS_ENABLE);
  95    ADVANCE_BATCH();
  96 }
  97
  98 const struct brw_tracked_state gen7_vs_state = {
  99    .dirty = {
 100       .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
 101       .brw   = (BRW_NEW_CURBE_OFFSETS |
 102                 BRW_NEW_URB_FENCE |
 103                 BRW_NEW_CONTEXT |
 104                 BRW_NEW_VERTEX_PROGRAM |
 105                 BRW_NEW_VS_BINDING_TABLE |
 106                 BRW_NEW_BATCH),
 107       .cache = CACHE_NEW_VS_PROG
 108    },
 109    .emit = upload_vs_state,
 110 };