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construct/include/ircd/simt/hwid.h

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// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2022 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_SIMT_HWID_H
/// HW_ID Register (legacy)
struct ircd_simt_hwid
{
uint
wave, ///< Wave buffer slot number.
simd, ///< SIMD assigned to within unit.
pipl, ///< Pipeline from which wave dispatched.
cu, ///< Compute Unit ID.
sa, ///< Shader Array within engine.
se, ///< Shader Engine ID.
tg, ///< Thread-group ID.
vm, ///< Virtual Memory ID.
queue, ///< Queue from which wave was dispatched.
state, ///< State ID (graphics only, not compute).
me; ///< Micro-engine ID.
};
/// Query hardware identification attributes (legacy)
inline struct ircd_simt_hwid
__attribute__((always_inline))
ircd_simt_hwid()
{
uint val = 0;
#if defined(__AMDGCN__)
asm volatile
(
"s_getreg_b32 %0, hwreg(HW_REG_HW_ID, 0, 32)"
: "=s" (val)
);
#endif
return (struct ircd_simt_hwid)
{
.wave = (val >> 0) & 0xf,
.simd = (val >> 4) & 0x3,
.pipl = (val >> 6) & 0x3,
.cu = (val >> 8) & 0xf,
.sa = (val >> 12) & 0x1,
.se = (val >> 13) & 0x3,
.tg = (val >> 16) & 0xf,
.vm = (val >> 20) & 0xf,
.queue = (val >> 24) & 0x7,
.state = (val >> 27) & 0x7,
.me = (val >> 30) & 0x3,
};
}