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1c62b5528a
We'll want both encoding and decoding here, as a generic hardware interface library based on GenXML. Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6196>
136 lines
4.7 KiB
C
136 lines
4.7 KiB
C
/*
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* Copyright (C) 2019 Collabora, Ltd.
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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 FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors (Collabora):
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* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
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*
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*/
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#include <assert.h>
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#include "util/u_math.h"
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#include "pan_encoder.h"
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/* Compute shaders are invoked with a gl_NumWorkGroups X/Y/Z triplet. Vertex
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* shaders, it turns out, are invoked with the same mechanism, with the triplet
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* (1, vertex_count, instance_count).
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*
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* Alongside this triplet is the gl_WorkGroupSize X/Y/Z triplet.
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*
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* Unfortunately, the packing for these triplet into the
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* mali_vertex_tiler_prefix is a little funky, using a dynamic bitfield. The
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* routines here exist to pack this */
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void
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panfrost_pack_work_groups_compute(
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struct mali_vertex_tiler_prefix *out,
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unsigned num_x,
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unsigned num_y,
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unsigned num_z,
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unsigned size_x,
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unsigned size_y,
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unsigned size_z,
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bool quirk_graphics)
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{
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uint32_t packed = 0;
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/* The values needing packing, in order, and the corresponding shifts.
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* Indicies into shift are off-by-one to make the logic easier */
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unsigned shifts[7] = { 0 };
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unsigned values[6] = {
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MALI_POSITIVE(size_x),
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MALI_POSITIVE(size_y),
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MALI_POSITIVE(size_z),
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MALI_POSITIVE(num_x),
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MALI_POSITIVE(num_y),
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MALI_POSITIVE(num_z),
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};
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for (unsigned i = 0; i < 6; ++i) {
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/* OR it in, shifting as required */
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packed |= (values[i] << shifts[i]);
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/* How many bits did we use? */
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unsigned bit_count = util_logbase2_ceil(values[i] + 1);
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/* Set the next shift accordingly */
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shifts[i + 1] = shifts[i] + bit_count;
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}
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/* Quirk: for non-instanced graphics, the blob sets workgroups_z_shift
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* = 32. This doesn't appear to matter to the hardware, but it's good
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* to be bit-identical. */
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if (quirk_graphics && (num_z <= 1))
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shifts[5] = 32;
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/* Quirk: for graphics, workgroups_x_shift_2 must be at least 2,
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* whereas for OpenCL it is simply equal to workgroups_x_shift. For GL
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* compute, it is always 2 if no barriers are in use, but is equal to
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* workgroups_x_shift is barriers are in use. */
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unsigned shift_2 = shifts[3];
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if (quirk_graphics)
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shift_2 = MAX2(shift_2, 2);
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/* Pack them in */
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uint32_t packed_shifts =
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(shifts[1] << 0) |
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(shifts[2] << 5) |
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(shifts[3] << 10) |
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(shifts[4] << 16) |
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(shifts[5] << 22) |
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(shift_2 << 28);
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/* Upload the packed bitfields */
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out->invocation_count = packed;
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out->invocation_shifts = packed_shifts;
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/* TODO: Compute workgroups_x_shift_3 */
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out->workgroups_x_shift_3 = shift_2;
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}
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/* Packs vertex/tiler descriptors simultaneously */
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void
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panfrost_pack_work_groups_fused(
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struct mali_vertex_tiler_prefix *vertex,
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struct mali_vertex_tiler_prefix *tiler,
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unsigned num_x,
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unsigned num_y,
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unsigned num_z,
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unsigned size_x,
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unsigned size_y,
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unsigned size_z)
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{
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panfrost_pack_work_groups_compute(vertex, num_x, num_y, num_z, size_x, size_y, size_z, true);
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/* Copy results over */
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tiler->invocation_count = vertex->invocation_count;
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tiler->invocation_shifts = vertex->invocation_shifts;
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/* Set special fields for each */
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vertex->workgroups_x_shift_3 = 5;
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tiler->workgroups_x_shift_3 = 6;
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}
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