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79 lines
3.1 KiB
C
79 lines
3.1 KiB
C
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/*
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* Copyright © 2019 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "anv_nir.h"
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#include "compiler/brw_nir.h"
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void
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anv_compute_push_layout(const struct anv_physical_device *pdevice,
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struct brw_stage_prog_data *prog_data,
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struct anv_pipeline_bind_map *map)
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{
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struct anv_push_range push_constant_range = {
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.set = ANV_DESCRIPTOR_SET_PUSH_CONSTANTS,
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.length = DIV_ROUND_UP(prog_data->nr_params, 8),
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};
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if (pdevice->info.gen >= 8 || pdevice->info.is_haswell) {
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/* The Skylake PRM contains the following restriction:
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*
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* "The driver must ensure The following case does not occur
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* without a flush to the 3D engine: 3DSTATE_CONSTANT_* with
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* buffer 3 read length equal to zero committed followed by a
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* 3DSTATE_CONSTANT_* with buffer 0 read length not equal to
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* zero committed."
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*
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* To avoid this, we program the buffers in the highest slots.
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* This way, slot 0 is only used if slot 3 is also used.
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*/
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int n = 3;
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for (int i = 3; i >= 0; i--) {
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const struct brw_ubo_range *ubo_range = &prog_data->ubo_ranges[i];
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if (ubo_range->length == 0)
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continue;
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const struct anv_pipeline_binding *binding =
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&map->surface_to_descriptor[ubo_range->block];
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map->push_ranges[n--] = (struct anv_push_range) {
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.set = binding->set,
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.index = binding->index,
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.dynamic_offset_index = binding->dynamic_offset_index,
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.start = ubo_range->start,
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.length = ubo_range->length,
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};
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}
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if (push_constant_range.length > 0)
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map->push_ranges[n--] = push_constant_range;
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} else {
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/* For Ivy Bridge, the push constants packets have a different
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* rule that would require us to iterate in the other direction
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* and possibly mess around with dynamic state base address.
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* Don't bother; just emit regular push constants at n = 0.
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*/
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map->push_ranges[0] = push_constant_range;
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}
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}
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