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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 <assert.h>
#include "util/u_math.h"
#include "pan_encoder.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,
bool quirk_graphics)
{
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] = {
MALI_POSITIVE(size_x),
MALI_POSITIVE(size_y),
MALI_POSITIVE(size_z),
MALI_POSITIVE(num_x),
MALI_POSITIVE(num_y),
MALI_POSITIVE(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;
}
/* Quirk: for non-instanced graphics, the blob sets workgroups_z_shift
* = 32. This doesn't appear to matter to the hardware, but it's good
* to be bit-identical. */
if (quirk_graphics && (num_z <= 1))
shifts[5] = 32;
/* Quirk: for graphics, workgroups_x_shift_2 must be at least 2,
* whereas for OpenCL it is simply equal to workgroups_x_shift. For GL
* compute, it seems it might *always* be 2, but this is suspicious and
* needs further investigation. (I'm probably just using GL wrong). */
unsigned shift_2 = shifts[3];
if (quirk_graphics)
shift_2 = MAX2(shift_2, 2);
/* Pack them in */
uint32_t packed_shifts =
(shifts[1] << 0) |
(shifts[2] << 5) |
(shifts[3] << 10) |
(shifts[4] << 16) |
(shifts[5] << 22) |
(shift_2 << 28);
/* Upload the packed bitfields */
out->invocation_count = packed;
out->invocation_shifts = packed_shifts;
/* TODO: Compute workgroups_x_shift_3 */
out->workgroups_x_shift_3 = 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, true);
/* Copy results over */
tiler->invocation_count = vertex->invocation_count;
tiler->invocation_shifts = vertex->invocation_shifts;
/* Set special fields for each */
vertex->workgroups_x_shift_3 = 5;
tiler->workgroups_x_shift_3 = 6;
}
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