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intel/compiler: shift mesh urb read/write window when offset is too large

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Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15303>
This commit is contained in:
Marcin Ślusarz 2021-12-09 16:51:41 +01:00 • committed by Marge Bot
parent 6c1c9067d9
commit 333a490e32
1 changed files with 32 additions and 3 deletions
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35
src/intel/compiler/brw_mesh.cpp
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@ -651,6 +651,23 @@ get_mesh_urb_handle(const fs_builder &bld, nir_intrinsic_op op)
return h;
}
static void
adjust_handle_and_offset(const fs_builder &bld,
fs_reg &urb_handle,
unsigned &urb_global_offset)
{
/* Make sure that URB global offset is below 2048 (2^11), because
* that's the maximum possible value encoded in Message Descriptor.
*/
unsigned adjustment = (urb_global_offset >> 11) << 11;
if (adjustment) {
fs_builder ubld8 = bld.group(8, 0).exec_all();
ubld8.ADD(urb_handle, urb_handle, brw_imm_ud(adjustment));
urb_global_offset -= adjustment;
}
}
static void
emit_urb_direct_writes(const fs_builder &bld, nir_intrinsic_instr *instr,
const fs_reg &src)
@ -684,6 +701,9 @@ emit_urb_direct_writes(const fs_builder &bld, nir_intrinsic_instr *instr,
const unsigned first_mask = (mask << comp_shift) & 0xF;
const unsigned second_mask = (mask >> (4 - comp_shift)) & 0xF;
unsigned urb_global_offset = offset_in_dwords / 4;
adjust_handle_and_offset(bld, urb_handle, urb_global_offset);
if (first_mask > 0) {
for (unsigned q = 0; q < bld.dispatch_width() / 8; q++) {
fs_builder bld8 = bld.group(8, q);
@ -706,11 +726,15 @@ emit_urb_direct_writes(const fs_builder &bld, nir_intrinsic_instr *instr,
fs_inst *inst = bld8.emit(SHADER_OPCODE_URB_WRITE_SIMD8_MASKED, reg_undef, payload);
inst->mlen = p;
inst->offset = offset_in_dwords / 4;
inst->offset = urb_global_offset;
assert(inst->offset < 2048);
}
}
if (second_mask > 0) {
urb_global_offset++;
adjust_handle_and_offset(bld, urb_handle, urb_global_offset);
for (unsigned q = 0; q < bld.dispatch_width() / 8; q++) {
fs_builder bld8 = bld.group(8, q);
@ -729,7 +753,8 @@ emit_urb_direct_writes(const fs_builder &bld, nir_intrinsic_instr *instr,
fs_inst *inst = bld8.emit(SHADER_OPCODE_URB_WRITE_SIMD8_MASKED, reg_undef, payload);
inst->mlen = p;
inst->offset = (offset_in_dwords / 4) + 1;
inst->offset = urb_global_offset;
assert(inst->offset < 2048);
}
}
}
@ -815,6 +840,9 @@ emit_urb_direct_reads(const fs_builder &bld, nir_intrinsic_instr *instr,
nir_src_as_uint(*offset_nir_src) +
nir_intrinsic_component(instr);
unsigned urb_global_offset = offset_in_dwords / 4;
adjust_handle_and_offset(bld, urb_handle, urb_global_offset);
const unsigned comp_offset = offset_in_dwords % 4;
const unsigned num_regs = comp_offset + comps;
@ -823,7 +851,8 @@ emit_urb_direct_reads(const fs_builder &bld, nir_intrinsic_instr *instr,
fs_inst *inst = ubld8.emit(SHADER_OPCODE_URB_READ_SIMD8, data, urb_handle);
inst->mlen = 1;
inst->offset = offset_in_dwords / 4;
inst->offset = urb_global_offset;
assert(inst->offset < 2048);
inst->size_written = num_regs * REG_SIZE;
for (unsigned c = 0; c < comps; c++) {