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/*
* Copyright © 2012 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 <stdbool.h>
#include "program/program.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "intel_batchbuffer.h"
static void
upload_ps_extra(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_FRAGMENT_PROGRAM */
const struct brw_fragment_program *fp =
brw_fragment_program_const(brw->fragment_program);
uint32_t dw1 = 0;
dw1 |= GEN8_PSX_PIXEL_SHADER_VALID;
if (fp->program.UsesKill)
dw1 |= GEN8_PSX_KILL_ENABLE;
/* CACHE_NEW_WM_PROG */
if (brw->wm.prog_data->num_varying_inputs != 0)
dw1 |= GEN8_PSX_ATTRIBUTE_ENABLE;
if (fp->program.Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH)) {
switch (fp->program.FragDepthLayout) {
case FRAG_DEPTH_LAYOUT_NONE:
case FRAG_DEPTH_LAYOUT_ANY:
dw1 |= GEN8_PSX_PSCDEPTH_ON;
break;
case FRAG_DEPTH_LAYOUT_GREATER:
dw1 |= GEN8_PSX_PSCDEPTH_ON_GE;
break;
case FRAG_DEPTH_LAYOUT_LESS:
dw1 |= GEN8_PSX_PSCDEPTH_ON_LE;
break;
case FRAG_DEPTH_LAYOUT_UNCHANGED:
break;
}
}
if (fp->program.Base.InputsRead & VARYING_BIT_POS)
dw1 |= GEN8_PSX_USES_SOURCE_DEPTH | GEN8_PSX_USES_SOURCE_W;
/* BRW_NEW_NUM_SAMPLES | _NEW_MULTISAMPLE */
bool multisampled_fbo = brw->num_samples > 1;
if (multisampled_fbo &&
_mesa_get_min_invocations_per_fragment(ctx, &fp->program, false) > 1)
dw1 |= GEN8_PSX_SHADER_IS_PER_SAMPLE;
if (fp->program.Base.SystemValuesRead & SYSTEM_BIT_SAMPLE_MASK_IN)
dw1 |= GEN8_PSX_SHADER_USES_INPUT_COVERAGE_MASK;
if (brw->wm.prog_data->uses_omask)
dw1 |= GEN8_PSX_OMASK_TO_RENDER_TARGET;
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_PS_EXTRA << 16 | (2 - 2));
OUT_BATCH(dw1);
ADVANCE_BATCH();
}
const struct brw_tracked_state gen8_ps_extra = {
.dirty = {
.mesa = _NEW_MULTISAMPLE,
.brw = BRW_NEW_CONTEXT | BRW_NEW_FRAGMENT_PROGRAM | BRW_NEW_NUM_SAMPLES,
.cache = CACHE_NEW_WM_PROG,
},
.emit = upload_ps_extra,
};
static void
upload_wm_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
uint32_t dw1 = 0;
dw1 |= GEN7_WM_STATISTICS_ENABLE;
dw1 |= GEN7_WM_LINE_AA_WIDTH_1_0;
dw1 |= GEN7_WM_LINE_END_CAP_AA_WIDTH_0_5;
dw1 |= GEN7_WM_POINT_RASTRULE_UPPER_RIGHT;
/* _NEW_LINE */
if (ctx->Line.StippleFlag)
dw1 |= GEN7_WM_LINE_STIPPLE_ENABLE;
/* _NEW_POLYGON */
if (ctx->Polygon.StippleFlag)
dw1 |= GEN7_WM_POLYGON_STIPPLE_ENABLE;
/* CACHE_NEW_WM_PROG */
dw1 |= brw->wm.prog_data->barycentric_interp_modes <<
GEN7_WM_BARYCENTRIC_INTERPOLATION_MODE_SHIFT;
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_WM << 16 | (2 - 2));
OUT_BATCH(dw1);
ADVANCE_BATCH();
}
const struct brw_tracked_state gen8_wm_state = {
.dirty = {
.mesa = _NEW_LINE | _NEW_POLYGON,
.brw = BRW_NEW_CONTEXT,
.cache = CACHE_NEW_WM_PROG,
},
.emit = upload_wm_state,
};
static void
upload_ps_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
uint32_t dw3 = 0, dw6 = 0, dw7 = 0, ksp0, ksp2 = 0;
/* Initialize the execution mask with VMask. Otherwise, derivatives are
* incorrect for subspans where some of the pixels are unlit. We believe
* the bit just didn't take effect in previous generations.
*/
dw3 |= GEN7_PS_VECTOR_MASK_ENABLE;
dw3 |=
(ALIGN(brw->wm.base.sampler_count, 4) / 4) << GEN7_PS_SAMPLER_COUNT_SHIFT;
/* CACHE_NEW_WM_PROG */
dw3 |=
((brw->wm.prog_data->base.binding_table.size_bytes / 4) <<
GEN7_PS_BINDING_TABLE_ENTRY_COUNT_SHIFT);
/* Use ALT floating point mode for ARB fragment programs, because they
* require 0^0 == 1. Even though _CurrentFragmentProgram is used for
* rendering, CurrentFragmentProgram is used for this check to
* differentiate between the GLSL and non-GLSL cases.
*/
if (ctx->Shader.CurrentProgram[MESA_SHADER_FRAGMENT] == NULL)
dw3 |= GEN7_PS_FLOATING_POINT_MODE_ALT;
/* 3DSTATE_PS expects the number of threads per PSD, which is always 64;
* it implicitly scales for different GT levels (which have some # of PSDs).
*/
dw6 |= (64 - 2) << HSW_PS_MAX_THREADS_SHIFT;
/* CACHE_NEW_WM_PROG */
if (brw->wm.prog_data->base.nr_params > 0)
dw6 |= GEN7_PS_PUSH_CONSTANT_ENABLE;
/* From the documentation for this packet:
* "If the PS kernel does not need the Position XY Offsets to
* compute a Position Value, then this field should be programmed
* to POSOFFSET_NONE."
*
* "SW Recommendation: If the PS kernel needs the Position Offsets
* to compute a Position XY value, this field should match Position
* ZW Interpolation Mode to ensure a consistent position.xyzw
* computation."
*
* We only require XY sample offsets. So, this recommendation doesn't
* look useful at the moment. We might need this in future.
*/
if (brw->wm.prog_data->uses_pos_offset)
dw6 |= GEN7_PS_POSOFFSET_SAMPLE;
else
dw6 |= GEN7_PS_POSOFFSET_NONE;
dw6 |= brw->wm.fast_clear_op;
/* _NEW_MULTISAMPLE
* In case of non 1x per sample shading, only one of SIMD8 and SIMD16
* should be enabled. We do 'SIMD16 only' dispatch if a SIMD16 shader
* is successfully compiled. In majority of the cases that bring us
* better performance than 'SIMD8 only' dispatch.
*/
int min_invocations_per_fragment =
_mesa_get_min_invocations_per_fragment(ctx, brw->fragment_program, false);
assert(min_invocations_per_fragment >= 1);
if (brw->wm.prog_data->prog_offset_16 || brw->wm.prog_data->no_8) {
dw6 |= GEN7_PS_16_DISPATCH_ENABLE;
if (!brw->wm.prog_data->no_8 && min_invocations_per_fragment == 1) {
dw6 |= GEN7_PS_8_DISPATCH_ENABLE;
dw7 |= (brw->wm.prog_data->base.dispatch_grf_start_reg <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_0);
dw7 |= (brw->wm.prog_data->dispatch_grf_start_reg_16 <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_2);
ksp0 = brw->wm.base.prog_offset;
ksp2 = brw->wm.base.prog_offset + brw->wm.prog_data->prog_offset_16;
} else {
dw7 |= (brw->wm.prog_data->dispatch_grf_start_reg_16 <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_0);
ksp0 = brw->wm.base.prog_offset + brw->wm.prog_data->prog_offset_16;
}
} else {
dw6 |= GEN7_PS_8_DISPATCH_ENABLE;
dw7 |= (brw->wm.prog_data->base.dispatch_grf_start_reg <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_0);
ksp0 = brw->wm.base.prog_offset;
}
BEGIN_BATCH(12);
OUT_BATCH(_3DSTATE_PS << 16 | (12 - 2));
OUT_BATCH(ksp0);
OUT_BATCH(0);
OUT_BATCH(dw3);
if (brw->wm.prog_data->base.total_scratch) {
OUT_RELOC64(brw->wm.base.scratch_bo,
I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
ffs(brw->wm.prog_data->base.total_scratch) - 11);
} else {
OUT_BATCH(0);
OUT_BATCH(0);
}
OUT_BATCH(dw6);
OUT_BATCH(dw7);
OUT_BATCH(0); /* kernel 1 pointer */
OUT_BATCH(0);
OUT_BATCH(ksp2);
OUT_BATCH(0);
ADVANCE_BATCH();
}
const struct brw_tracked_state gen8_ps_state = {
.dirty = {
.mesa = _NEW_MULTISAMPLE,
.brw = BRW_NEW_FRAGMENT_PROGRAM |
BRW_NEW_BATCH,
.cache = CACHE_NEW_WM_PROG
},
.emit = upload_ps_state,
};
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