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/*
* Copyright (C) 2019 Collabora, Ltd.
*
* 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 (Collabora):
* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
*
*/
#include "pan_context.h"
/* Compute shaders are invoked with a gl_NumWorkGroups X/Y/Z triplet. Vertex
* shaders, it turns out, are invoked with the same mechanism, with the triplet
* (1, vertex_count, instance_count).
*
* Alongside this triplet is the gl_WorkGroupSize X/Y/Z triplet.
*
* Unfortunately, the packing for these triplet into the
* mali_vertex_tiler_prefix is a little funky, using a dynamic bitfield. The
* routines here exist to pack this */
void
panfrost_pack_work_groups_compute(
struct mali_vertex_tiler_prefix *out,
unsigned num_x,
unsigned num_y,
unsigned num_z,
unsigned size_x,
unsigned size_y,
unsigned size_z)
{
/* First of all, all 6 values are off-by-one (strictly positive).
* Account for that, first by ensuring all values are strictly positive
* and then by offsetting */
assert(num_x > 0);
assert(num_y > 0);
assert(num_z > 0);
assert(size_x > 0);
assert(size_y > 0);
assert(size_z > 0);
num_x = MALI_POSITIVE(num_x);
num_y = MALI_POSITIVE(num_y);
num_z = MALI_POSITIVE(num_z);
size_x = MALI_POSITIVE(size_x);
size_y = MALI_POSITIVE(size_y);
size_z = MALI_POSITIVE(size_z);
/* Next up is to pack in order */
uint32_t packed = 0;
/* The values needing packing, in order, and the corresponding shifts.
* Indicies into shift are off-by-one to make the logic easier */
unsigned shifts[7] = { 0 };
unsigned values[6] = { size_x, size_y, size_z, num_x, num_y, num_z };
for (unsigned i = 0; i < 6; ++i) {
/* OR it in, shifting as required */
packed |= (values[i] << shifts[i]);
/* How many bits did we use? */
unsigned bit_count = util_logbase2_ceil(values[i] + 1);
/* Set the next shift accordingly */
shifts[i + 1] = shifts[i] + bit_count;
}
/* We're packed, so upload everything */
out->invocation_count = packed;
out->size_y_shift = shifts[1];
out->size_z_shift = shifts[2];
out->workgroups_x_shift = shifts[3];
out->workgroups_y_shift = shifts[4];
out->workgroups_z_shift = shifts[5];
/* Special fields */
out->workgroups_x_shift_2 = MAX2(out->workgroups_x_shift, 2);
out->workgroups_x_shift_3 = out->workgroups_x_shift_2;
}
/* Packs vertex/tiler descriptors simultaneously */
void
panfrost_pack_work_groups_fused(
struct mali_vertex_tiler_prefix *vertex,
struct mali_vertex_tiler_prefix *tiler,
unsigned num_x,
unsigned num_y,
unsigned num_z,
unsigned size_x,
unsigned size_y,
unsigned size_z)
{
panfrost_pack_work_groups_compute(vertex, num_x, num_y, num_z, size_x, size_y, size_z);
/* Copy results over */
tiler->invocation_count = vertex->invocation_count;
tiler->size_y_shift = vertex->size_y_shift;
tiler->size_z_shift = vertex->size_z_shift;
tiler->workgroups_x_shift = vertex->workgroups_x_shift;
tiler->workgroups_x_shift_2 = vertex->workgroups_x_shift_2;
tiler->workgroups_y_shift = vertex->workgroups_y_shift;
tiler->workgroups_z_shift = vertex->workgroups_z_shift;
/* Set special fields for each */
vertex->workgroups_x_shift_3 = 5;
tiler->workgroups_x_shift_3 = 6;
}
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