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 gl_context *ctx = &brw->ctx;
  36    uint32_t floating_point_mode = 0;
  37    const int max_threads_shift = brw->is_haswell ?
  38       HSW_VS_MAX_THREADS_SHIFT : GEN6_VS_MAX_THREADS_SHIFT;
  39
  40    gen7_emit_vs_workaround_flush(brw);
  41
  42    /* BRW_NEW_VS_BINDING_TABLE */
  43    BEGIN_BATCH(2);
  44    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS_VS << 16 | (2 - 2));
  45    OUT_BATCH(brw->vs.bind_bo_offset);
  46    ADVANCE_BATCH();
  47
  48    /* CACHE_NEW_SAMPLER */
  49    BEGIN_BATCH(2);
  50    OUT_BATCH(_3DSTATE_SAMPLER_STATE_POINTERS_VS << 16 | (2 - 2));
  51    OUT_BATCH(brw->vs.sampler_offset);
  52    ADVANCE_BATCH();
  53
  54    if (brw->vs.push_const_size == 0) {
  55       /* Disable the push constant buffers. */
  56       BEGIN_BATCH(7);
  57       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (7 - 2));
  58       OUT_BATCH(0);
  59       OUT_BATCH(0);
  60       OUT_BATCH(0);
  61       OUT_BATCH(0);
  62       OUT_BATCH(0);
  63       OUT_BATCH(0);
  64       ADVANCE_BATCH();
  65    } else {
  66       BEGIN_BATCH(7);
  67       OUT_BATCH(_3DSTATE_CONSTANT_VS << 16 | (7 - 2));
  68       OUT_BATCH(brw->vs.push_const_size);
  69       OUT_BATCH(0);
  70       /* Pointer to the VS constant buffer.  Covered by the set of
  71        * state flags from gen6_prepare_wm_contants
  72        */
  73       OUT_BATCH(brw->vs.push_const_offset | GEN7_MOCS_L3);
  74       OUT_BATCH(0);
  75       OUT_BATCH(0);
  76       OUT_BATCH(0);
  77       ADVANCE_BATCH();
  78    }
  79
  80    /* Use ALT floating point mode for ARB vertex programs, because they
  81     * require 0^0 == 1.
  82     */
  83    if (ctx->Shader.CurrentVertexProgram == NULL)
  84       floating_point_mode = GEN6_VS_FLOATING_POINT_MODE_ALT;
  85
  86    BEGIN_BATCH(6);
  87    OUT_BATCH(_3DSTATE_VS << 16 | (6 - 2));
  88    OUT_BATCH(brw->vs.prog_offset);
  89    OUT_BATCH(floating_point_mode |
  90              ((ALIGN(brw->vs.sampler_count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT));
  91
  92    if (brw->vs.prog_data->base.total_scratch) {
  93       OUT_RELOC(brw->vs.scratch_bo,
  94                 I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
  95                 ffs(brw->vs.prog_data->base.total_scratch) - 11);
  96    } else {
  97       OUT_BATCH(0);
  98    }
  99
 100    OUT_BATCH((brw->vs.prog_data->base.dispatch_grf_start_reg <<
 101               GEN6_VS_DISPATCH_START_GRF_SHIFT) |
 102              (brw->vs.prog_data->base.urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
 103              (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
 104
 105    OUT_BATCH(((brw->max_vs_threads - 1) << max_threads_shift) |
 106              GEN6_VS_STATISTICS_ENABLE |
 107              GEN6_VS_ENABLE);
 108    ADVANCE_BATCH();
 109 }
 110
 111 const struct brw_tracked_state gen7_vs_state = {
 112    .dirty = {
 113       .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
 114       .brw   = (BRW_NEW_CONTEXT |
 115                 BRW_NEW_VERTEX_PROGRAM |
 116                 BRW_NEW_VS_BINDING_TABLE |
 117                 BRW_NEW_BATCH),
 118       .cache = CACHE_NEW_VS_PROG | CACHE_NEW_SAMPLER
 119    },
 120    .emit = upload_vs_state,
 121 };