diff options
Diffstat (limited to 'src/gallium/drivers/panfrost/pan_invocation.c')
| -rw-r--r-- | src/gallium/drivers/panfrost/pan_invocation.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/src/gallium/drivers/panfrost/pan_invocation.c b/src/gallium/drivers/panfrost/pan_invocation.c new file mode 100644 index 00000000000..0d4945d05b1 --- /dev/null +++ b/src/gallium/drivers/panfrost/pan_invocation.c @@ -0,0 +1,130 @@ +/* + * 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 <[email protected]> + * + */ + +#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_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; +} + |