/*
* Copyright © 2011 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 "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "brw_util.h"
#include "brw_wm.h"
#include "program/program.h"
#include "program/prog_parameter.h"
#include "program/prog_statevars.h"
#include "main/framebuffer.h"
#include "intel_batchbuffer.h"
static void
upload_wm_state(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_FS_PROG_DATA */
const struct brw_wm_prog_data *prog_data =
brw_wm_prog_data(brw->wm.base.prog_data);
bool writes_depth = prog_data->computed_depth_mode != BRW_PSCDEPTH_OFF;
uint32_t dw1, dw2;
/* _NEW_BUFFERS */
const bool multisampled_fbo = _mesa_geometric_samples(ctx->DrawBuffer) > 1;
dw1 = dw2 = 0;
dw1 |= GEN7_WM_STATISTICS_ENABLE;
dw1 |= GEN7_WM_LINE_AA_WIDTH_1_0;
dw1 |= GEN7_WM_LINE_END_CAP_AA_WIDTH_0_5;
/* _NEW_LINE */
if (ctx->Line.StippleFlag)
dw1 |= GEN7_WM_LINE_STIPPLE_ENABLE;
/* _NEW_POLYGON */
if (ctx->Polygon.StippleFlag)
dw1 |= GEN7_WM_POLYGON_STIPPLE_ENABLE;
if (prog_data->uses_src_depth)
dw1 |= GEN7_WM_USES_SOURCE_DEPTH;
if (prog_data->uses_src_w)
dw1 |= GEN7_WM_USES_SOURCE_W;
dw1 |= prog_data->computed_depth_mode << GEN7_WM_COMPUTED_DEPTH_MODE_SHIFT;
dw1 |= prog_data->barycentric_interp_modes <<
GEN7_WM_BARYCENTRIC_INTERPOLATION_MODE_SHIFT;
/* _NEW_COLOR, _NEW_MULTISAMPLE _NEW_BUFFERS */
/* Enable if the pixel shader kernel generates and outputs oMask.
*/
if (prog_data->uses_kill ||
_mesa_is_alpha_test_enabled(ctx) ||
_mesa_is_alpha_to_coverage_enabled(ctx) ||
prog_data->uses_omask) {
dw1 |= GEN7_WM_KILL_ENABLE;
}
/* _NEW_BUFFERS | _NEW_COLOR */
if (brw_color_buffer_write_enabled(brw) || writes_depth ||
prog_data->has_side_effects || dw1 & GEN7_WM_KILL_ENABLE) {
dw1 |= GEN7_WM_DISPATCH_ENABLE;
}
if (multisampled_fbo) {
/* _NEW_MULTISAMPLE */
if (ctx->Multisample.Enabled)
dw1 |= GEN7_WM_MSRAST_ON_PATTERN;
else
dw1 |= GEN7_WM_MSRAST_OFF_PIXEL;
if (prog_data->persample_dispatch)
dw2 |= GEN7_WM_MSDISPMODE_PERSAMPLE;
else
dw2 |= GEN7_WM_MSDISPMODE_PERPIXEL;
} else {
dw1 |= GEN7_WM_MSRAST_OFF_PIXEL;
dw2 |= GEN7_WM_MSDISPMODE_PERSAMPLE;
}
if (prog_data->uses_sample_mask) {
dw1 |= GEN7_WM_USES_INPUT_COVERAGE_MASK;
}
/* BRW_NEW_FS_PROG_DATA */
if (prog_data->early_fragment_tests)
dw1 |= GEN7_WM_EARLY_DS_CONTROL_PREPS;
else if (prog_data->has_side_effects)
dw1 |= GEN7_WM_EARLY_DS_CONTROL_PSEXEC;
/* The "UAV access enable" bits are unnecessary on HSW because they only
* seem to have an effect on the HW-assisted coherency mechanism which we
* don't need, and the rasterization-related UAV_ONLY flag and the
* DISPATCH_ENABLE bit can be set independently from it.
* C.f. gen8_upload_ps_extra().
*
* BRW_NEW_FRAGMENT_PROGRAM | BRW_NEW_FS_PROG_DATA | _NEW_BUFFERS | _NEW_COLOR
*/
if (brw->is_haswell &&
!(brw_color_buffer_write_enabled(brw) || writes_depth) &&
prog_data->has_side_effects)
dw2 |= HSW_WM_UAV_ONLY;
BEGIN_BATCH(3);
OUT_BATCH(_3DSTATE_WM << 16 | (3 - 2));
OUT_BATCH(dw1);
OUT_BATCH(dw2);
ADVANCE_BATCH();
}
const struct brw_tracked_state gen7_wm_state = {
.dirty = {
.mesa = _NEW_BUFFERS |
_NEW_COLOR |
_NEW_LINE |
_NEW_MULTISAMPLE |
_NEW_POLYGON,
.brw = BRW_NEW_BATCH |
BRW_NEW_BLORP |
BRW_NEW_FS_PROG_DATA,
},
.emit = upload_wm_state,
};
static void
gen7_upload_ps_state(struct brw_context *brw,
const struct brw_stage_state *stage_state,
const struct brw_wm_prog_data *prog_data,
bool enable_dual_src_blend, unsigned sample_mask,
unsigned fast_clear_op)
{
const struct gen_device_info *devinfo = &brw->screen->devinfo;
uint32_t dw2, dw4, dw5, ksp0, ksp2;
const int max_threads_shift = brw->is_haswell ?
HSW_PS_MAX_THREADS_SHIFT : IVB_PS_MAX_THREADS_SHIFT;
dw2 = dw4 = dw5 = ksp2 = 0;
const unsigned sampler_count =
DIV_ROUND_UP(CLAMP(stage_state->sampler_count, 0, 16), 4);
dw2 |= SET_FIELD(sampler_count, GEN7_PS_SAMPLER_COUNT);
dw2 |= ((prog_data->base.binding_table.size_bytes / 4) <<
GEN7_PS_BINDING_TABLE_ENTRY_COUNT_SHIFT);
if (prog_data->base.use_alt_mode)
dw2 |= GEN7_PS_FLOATING_POINT_MODE_ALT;
/* Haswell requires the sample mask to be set in this packet as well as
* in 3DSTATE_SAMPLE_MASK; the values should match. */
/* _NEW_BUFFERS, _NEW_MULTISAMPLE */
if (brw->is_haswell)
dw4 |= SET_FIELD(sample_mask, HSW_PS_SAMPLE_MASK);
dw4 |= (devinfo->max_wm_threads - 1) << max_threads_shift;
if (prog_data->base.nr_params > 0)
dw4 |= GEN7_PS_PUSH_CONSTANT_ENABLE;
/* From the IVB PRM, volume 2 part 1, page 287:
* "This bit is inserted in the PS payload header and made available to
* the DataPort (either via the message header or via header bypass) to
* indicate that oMask data (one or two phases) is included in Render
* Target Write messages. If present, the oMask data is used to mask off
* samples."
*/
if (prog_data->uses_omask)
dw4 |= GEN7_PS_OMASK_TO_RENDER_TARGET;
/* From the IVB PRM, volume 2 part 1, page 287:
* "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 (prog_data->uses_pos_offset)
dw4 |= GEN7_PS_POSOFFSET_SAMPLE;
else
dw4 |= GEN7_PS_POSOFFSET_NONE;
/* The hardware wedges if you have this bit set but don't turn on any dual
* source blend factors.
*/
if (enable_dual_src_blend)
dw4 |= GEN7_PS_DUAL_SOURCE_BLEND_ENABLE;
/* BRW_NEW_FS_PROG_DATA */
if (prog_data->num_varying_inputs != 0)
dw4 |= GEN7_PS_ATTRIBUTE_ENABLE;
dw4 |= fast_clear_op;
if (prog_data->dispatch_16)
dw4 |= GEN7_PS_16_DISPATCH_ENABLE;
if (prog_data->dispatch_8)
dw4 |= GEN7_PS_8_DISPATCH_ENABLE;
dw5 |= prog_data->base.dispatch_grf_start_reg <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_0;
dw5 |= prog_data->dispatch_grf_start_reg_2 <<
GEN7_PS_DISPATCH_START_GRF_SHIFT_2;
ksp0 = stage_state->prog_offset;
ksp2 = stage_state->prog_offset + prog_data->prog_offset_2;
BEGIN_BATCH(8);
OUT_BATCH(_3DSTATE_PS << 16 | (8 - 2));
OUT_BATCH(ksp0);
OUT_BATCH(dw2);
if (prog_data->base.total_scratch) {
OUT_RELOC(brw->wm.base.scratch_bo,
I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,
ffs(stage_state->per_thread_scratch) - 11);
} else {
OUT_BATCH(0);
}
OUT_BATCH(dw4);
OUT_BATCH(dw5);
OUT_BATCH(0); /* kernel 1 pointer */
OUT_BATCH(ksp2);
ADVANCE_BATCH();
}
static void
upload_ps_state(struct brw_context *brw)
{
/* BRW_NEW_FS_PROG_DATA */
const struct brw_wm_prog_data *prog_data =
brw_wm_prog_data(brw->wm.base.prog_data);
const struct gl_context *ctx = &brw->ctx;
/* BRW_NEW_FS_PROG_DATA | _NEW_COLOR */
const bool enable_dual_src_blend = prog_data->dual_src_blend &&
(ctx->Color.BlendEnabled & 1) &&
ctx->Color.Blend[0]._UsesDualSrc;
/* _NEW_BUFFERS, _NEW_MULTISAMPLE */
const unsigned sample_mask =
brw->is_haswell ? gen6_determine_sample_mask(brw) : 0;
gen7_upload_ps_state(brw, &brw->wm.base, prog_data,
enable_dual_src_blend, sample_mask,
brw->wm.fast_clear_op);
}
const struct brw_tracked_state gen7_ps_state = {
.dirty = {
.mesa = _NEW_BUFFERS |
_NEW_COLOR |
_NEW_MULTISAMPLE,
.brw = BRW_NEW_BATCH |
BRW_NEW_BLORP |
BRW_NEW_FS_PROG_DATA,
},
.emit = upload_ps_state,
};