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
32static void
33upload_vs_state(struct brw_context *brw)
34{
35   struct intel_context *intel = &brw->intel;
36   uint32_t floating_point_mode = 0;
37   const int max_threads_shift = brw->intel.is_haswell ?
38      HSW_VS_MAX_THREADS_SHIFT : GEN6_VS_MAX_THREADS_SHIFT;
39
40   gen7_emit_vs_workaround_flush(intel);
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->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);
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 (intel->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->sampler.count, 4)/4) << GEN6_VS_SAMPLER_COUNT_SHIFT));
91
92   if (brw->vs.prog_data->total_scratch) {
93      OUT_RELOC(brw->vs.scratch_bo,
94		I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
95		ffs(brw->vs.prog_data->total_scratch) - 11);
96   } else {
97      OUT_BATCH(0);
98   }
99
100   OUT_BATCH((1 << GEN6_VS_DISPATCH_START_GRF_SHIFT) |
101	     (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
102	     (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
103
104   OUT_BATCH(((brw->max_vs_threads - 1) << max_threads_shift) |
105	     GEN6_VS_STATISTICS_ENABLE |
106	     GEN6_VS_ENABLE);
107   ADVANCE_BATCH();
108}
109
110const struct brw_tracked_state gen7_vs_state = {
111   .dirty = {
112      .mesa  = _NEW_TRANSFORM | _NEW_PROGRAM_CONSTANTS,
113      .brw   = (BRW_NEW_CONTEXT |
114		BRW_NEW_VERTEX_PROGRAM |
115		BRW_NEW_VS_BINDING_TABLE |
116		BRW_NEW_BATCH),
117      .cache = CACHE_NEW_VS_PROG | CACHE_NEW_SAMPLER
118   },
119   .emit = upload_vs_state,
120};
121