/*
* Copyright © 2013 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.
*/
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
static void
upload_gs_state(struct brw_context *brw)
{
const struct brw_stage_state *stage_state = &brw->gs.base;
const int max_threads_shift = brw->is_haswell ?
HSW_GS_MAX_THREADS_SHIFT : GEN6_GS_MAX_THREADS_SHIFT;
/* BRW_NEW_GEOMETRY_PROGRAM */
bool active = brw->geometry_program;
/* BRW_NEW_GS_PROG_DATA */
const struct brw_vue_prog_data *prog_data = &brw->gs.prog_data->base;
/**
* From Graphics BSpec: 3D-Media-GPGPU Engine > 3D Pipeline Stages >
* Geometry > Geometry Shader > State:
*
* "Note: Because of corruption in IVB:GT2, software needs to flush the
* whole fixed function pipeline when the GS enable changes value in
* the 3DSTATE_GS."
*
* The hardware architects have clarified that in this context "flush the
* whole fixed function pipeline" means to emit a PIPE_CONTROL with the "CS
* Stall" bit set.
*/
if (!brw->is_haswell && brw->gt == 2 && brw->gs.enabled != active)
gen7_emit_cs_stall_flush(brw);
if (active) {
BEGIN_BATCH(7);
OUT_BATCH(_3DSTATE_GS << 16 | (7 - 2));
OUT_BATCH(stage_state->prog_offset);
OUT_BATCH(((ALIGN(stage_state->sampler_count, 4)/4) <<
GEN6_GS_SAMPLER_COUNT_SHIFT) |
((brw->gs.prog_data->base.base.binding_table.size_bytes / 4) <<
GEN6_GS_BINDING_TABLE_ENTRY_COUNT_SHIFT));
if (brw->gs.prog_data->base.base.total_scratch) {
OUT_RELOC(stage_state->scratch_bo,
I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
ffs(brw->gs.prog_data->base.base.total_scratch) - 11);
} else {
OUT_BATCH(0);
}
uint32_t dw4 =
((brw->gs.prog_data->output_vertex_size_hwords * 2 - 1) <<
GEN7_GS_OUTPUT_VERTEX_SIZE_SHIFT) |
(brw->gs.prog_data->output_topology <<
GEN7_GS_OUTPUT_TOPOLOGY_SHIFT) |
(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);
/* Note: the meaning of the GEN7_GS_REORDER_TRAILING bit changes between
* Ivy Bridge and Haswell.
*
* On Ivy Bridge, setting this bit causes the vertices of a triangle
* strip to be delivered to the geometry shader in an order that does
* not strictly follow the OpenGL spec, but preserves triangle
* orientation. For example, if the vertices are (1, 2, 3, 4, 5), then
* the geometry shader sees triangles:
*
* (1, 2, 3), (2, 4, 3), (3, 4, 5)
*
* (Clearing the bit is even worse, because it fails to preserve
* orientation).
*
* Triangle strips with adjacency always ordered in a way that preserves
* triangle orientation but does not strictly follow the OpenGL spec,
* regardless of the setting of this bit.
*
* On Haswell, both triangle strips and triangle strips with adjacency
* are always ordered in a way that preserves triangle orientation.
* Setting this bit causes the ordering to strictly follow the OpenGL
* spec.
*
* So in either case we want to set the bit. Unfortunately on Ivy
* Bridge this will get the order close to correct but not perfect.
*/
uint32_t dw5 =
((brw->max_gs_threads - 1) << max_threads_shift) |
(brw->gs.prog_data->control_data_header_size_hwords <<
GEN7_GS_CONTROL_DATA_HEADER_SIZE_SHIFT) |
((brw->gs.prog_data->invocations - 1) <<
GEN7_GS_INSTANCE_CONTROL_SHIFT) |
brw->gs.prog_data->dispatch_mode |
GEN6_GS_STATISTICS_ENABLE |
(brw->gs.prog_data->include_primitive_id ?
GEN7_GS_INCLUDE_PRIMITIVE_ID : 0) |
GEN7_GS_REORDER_TRAILING |
GEN7_GS_ENABLE;
uint32_t dw6 = 0;
if (brw->is_haswell) {
dw6 |= brw->gs.prog_data->control_data_format <<
HSW_GS_CONTROL_DATA_FORMAT_SHIFT;
} else {
dw5 |= brw->gs.prog_data->control_data_format <<
IVB_GS_CONTROL_DATA_FORMAT_SHIFT;
}
OUT_BATCH(dw4);
OUT_BATCH(dw5);
OUT_BATCH(dw6);
ADVANCE_BATCH();
} else {
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) |
GEN7_GS_INCLUDE_VERTEX_HANDLES |
(0 << GEN6_GS_URB_ENTRY_READ_OFFSET_SHIFT));
OUT_BATCH((0 << GEN6_GS_MAX_THREADS_SHIFT) |
GEN6_GS_STATISTICS_ENABLE);
OUT_BATCH(0);
ADVANCE_BATCH();
}
brw->gs.enabled = active;
}
const struct brw_tracked_state gen7_gs_state = {
.dirty = {
.mesa = _NEW_TRANSFORM,
.brw = BRW_NEW_BATCH |
BRW_NEW_CONTEXT |
BRW_NEW_GEOMETRY_PROGRAM |
BRW_NEW_GS_PROG_DATA,
},
.emit = upload_gs_state,
};