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/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
static void
gen6_upload_gs_push_constants(struct brw_context *brw)
{
struct brw_stage_state *stage_state = &brw->gs.base;
/* BRW_NEW_GEOMETRY_PROGRAM */
const struct brw_geometry_program *gp =
(struct brw_geometry_program *) brw->geometry_program;
if (gp) {
/* BRW_NEW_GS_PROG_DATA */
struct brw_stage_prog_data *prog_data = &brw->gs.prog_data->base.base;
gen6_upload_push_constants(brw, &gp->program.Base, prog_data,
stage_state, AUB_TRACE_VS_CONSTANTS);
}
if (brw->gen >= 7)
gen7_upload_constant_state(brw, stage_state, gp, _3DSTATE_CONSTANT_GS);
}
const struct brw_tracked_state gen6_gs_push_constants = {
.dirty = {
.mesa = _NEW_PROGRAM_CONSTANTS |
_NEW_TRANSFORM,
.brw = BRW_NEW_BATCH |
BRW_NEW_GEOMETRY_PROGRAM |
BRW_NEW_GS_PROG_DATA |
BRW_NEW_PUSH_CONSTANT_ALLOCATION,
},
.emit = gen6_upload_gs_push_constants,
};
static void
upload_gs_state_for_tf(struct brw_context *brw)
{
BEGIN_BATCH(7);
OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
OUT_BATCH(brw->ff_gs.prog_offset);
OUT_BATCH(GEN6_GS_SPF_MODE | GEN6_GS_VECTOR_MASK_ENABLE);
OUT_BATCH(0); /* no scratch space */
OUT_BATCH((2 << GEN6_GS_DISPATCH_START_GRF_SHIFT) |
(brw->ff_gs.prog_data->urb_read_length << GEN6_GS_URB_READ_LENGTH_SHIFT));
OUT_BATCH(((brw->max_gs_threads - 1) << GEN6_GS_MAX_THREADS_SHIFT) |
GEN6_GS_STATISTICS_ENABLE |
GEN6_GS_SO_STATISTICS_ENABLE |
GEN6_GS_RENDERING_ENABLE);
OUT_BATCH(GEN6_GS_SVBI_PAYLOAD_ENABLE |
GEN6_GS_SVBI_POSTINCREMENT_ENABLE |
(brw->ff_gs.prog_data->svbi_postincrement_value <<
GEN6_GS_SVBI_POSTINCREMENT_VALUE_SHIFT) |
GEN6_GS_ENABLE);
ADVANCE_BATCH();
}
static void
upload_gs_state(struct brw_context *brw)
{
/* BRW_NEW_GEOMETRY_PROGRAM */
bool active = brw->geometry_program;
/* BRW_NEW_GS_PROG_DATA */
const struct brw_vec4_prog_data *prog_data = &brw->gs.prog_data->base;
const struct brw_stage_state *stage_state = &brw->gs.base;
if (!active || stage_state->push_const_size == 0) {
/* Disable the push constant buffers. */
BEGIN_BATCH(5);
OUT_BATCH(_3DSTATE_CONSTANT_GS << 16 | (5 - 2));
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(5);
OUT_BATCH(_3DSTATE_CONSTANT_GS << 16 |
GEN6_CONSTANT_BUFFER_0_ENABLE |
(5 - 2));
/* Pointer to the GS constant buffer. Covered by the set of
* state flags from gen6_upload_vs_constants
*/
OUT_BATCH(stage_state->push_const_offset +
stage_state->push_const_size - 1);
OUT_BATCH(0);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
if (active) {
BEGIN_BATCH(7);
OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
OUT_BATCH(stage_state->prog_offset);
/* GEN6_GS_SPF_MODE and GEN6_GS_VECTOR_MASK_ENABLE are enabled as it
* was previously done for gen6.
*
* TODO: test with both disabled to see if the HW is behaving
* as expected, like in gen7.
*/
OUT_BATCH(GEN6_GS_SPF_MODE | GEN6_GS_VECTOR_MASK_ENABLE |
((ALIGN(stage_state->sampler_count, 4)/4) <<
GEN6_GS_SAMPLER_COUNT_SHIFT) |
((prog_data->base.binding_table.size_bytes / 4) <<
GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
if (prog_data->base.total_scratch) {
OUT_RELOC(stage_state->scratch_bo,
I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
ffs(prog_data->base.total_scratch) - 11);
} else {
OUT_BATCH(0); /* no scratch space */
}
OUT_BATCH((prog_data->urb_read_length <<
GEN6_GS_URB_READ_LENGTH_SHIFT) |
(0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT) |
(prog_data->base.dispatch_grf_start_reg <<
GEN6_GS_DISPATCH_START_GRF_SHIFT));
OUT_BATCH(((brw->max_gs_threads - 1) << GEN6_GS_MAX_THREADS_SHIFT) |
GEN6_GS_STATISTICS_ENABLE |
GEN6_GS_SO_STATISTICS_ENABLE |
GEN6_GS_RENDERING_ENABLE);
if (brw->gs.prog_data->gen6_xfb_enabled) {
/* GEN6_GS_REORDER is equivalent to GEN7_GS_REORDER_TRAILING
* in gen7. SNB and IVB specs are the same regarding the reordering of
* TRISTRIP/TRISTRIP_REV vertices and triangle orientation, so we do
* the same thing in both generations. For more details, see the
* comment in gen7_gs_state.c
*/
OUT_BATCH(GEN6_GS_REORDER |
GEN6_GS_SVBI_PAYLOAD_ENABLE |
GEN6_GS_ENABLE);
} else {
OUT_BATCH(GEN6_GS_REORDER | GEN6_GS_ENABLE);
}
ADVANCE_BATCH();
} else if (brw->ff_gs.prog_active) {
/* In gen6, transform feedback for the VS stage is done with an ad-hoc GS
* program. This function provides the needed 3DSTATE_GS for this.
*/
upload_gs_state_for_tf(brw);
} else {
/* No GS function required */
BEGIN_BATCH(7);
OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
OUT_BATCH(0); /* prog_bo */
OUT_BATCH((0 << GEN6_GS_SAMPLER_COUNT_SHIFT) |
(0 << GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
OUT_BATCH(0); /* scratch space base offset */
OUT_BATCH((1 << GEN6_GS_DISPATCH_START_GRF_SHIFT) |
(0 << GEN6_GS_URB_READ_LENGTH_SHIFT) |
(0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT));
OUT_BATCH((0 << GEN6_GS_MAX_THREADS_SHIFT) |
GEN6_GS_STATISTICS_ENABLE |
GEN6_GS_RENDERING_ENABLE);
OUT_BATCH(0);
ADVANCE_BATCH();
}
brw->gs.enabled = active;
}
const struct brw_tracked_state gen6_gs_state = {
.dirty = {
.mesa = _NEW_PROGRAM_CONSTANTS |
_NEW_TRANSFORM,
.brw = BRW_NEW_BATCH |
BRW_NEW_CONTEXT |
BRW_NEW_FF_GS_PROG_DATA |
BRW_NEW_GEOMETRY_PROGRAM |
BRW_NEW_GS_PROG_DATA |
BRW_NEW_PUSH_CONSTANT_ALLOCATION,
},
.emit = upload_gs_state,
};
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