| /* |
| * 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) |
| { |
| /* 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]; |
| |
| /* 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)) |
| out->workgroups_z_shift = 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). */ |
| |
| if (quirk_graphics) |
| out->workgroups_x_shift_2 = MAX2(out->workgroups_x_shift, 2); |
| else |
| out->workgroups_x_shift_2 = out->workgroups_x_shift; |
| |
| /* TODO: Compute workgroups_x_shift_3 */ |
| 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, true); |
| |
| /* 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; |
| } |
| |