/* $NetBSD: aes_neon_impl.c,v 1.5 2020/10/10 08:24:10 jmcneill Exp $ */
/*-
* Copyright (c) 2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(1, "$NetBSD: aes_neon_impl.c,v 1.5 2020/10/10 08:24:10 jmcneill Exp $");
#include <sys/types.h>
#include <sys/proc.h>
#include <crypto/aes/aes.h>
#include <crypto/aes/aes_impl.h>
#include <crypto/aes/arch/arm/aes_neon.h>
#ifdef __aarch64__
#include <aarch64/armreg.h>
#endif
#ifdef _KERNEL
#ifndef __aarch64__
#include <arm/locore.h>
#endif
#include <arm/fpu.h>
#else
#include <sys/sysctl.h>
#include <stddef.h>
#define fpu_kern_enter() ((void)0)
#define fpu_kern_leave() ((void)0)
#endif
static void
aes_neon_setenckey_impl(struct aesenc *enc, const uint8_t *key,
uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_setenckey(enc, key, nrounds);
fpu_kern_leave();
}
static void
aes_neon_setdeckey_impl(struct aesdec *dec, const uint8_t *key,
uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_setdeckey(dec, key, nrounds);
fpu_kern_leave();
}
static void
aes_neon_enc_impl(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_enc(enc, in, out, nrounds);
fpu_kern_leave();
}
static void
aes_neon_dec_impl(const struct aesdec *dec, const uint8_t in[static 16],
uint8_t out[static 16], uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_dec(dec, in, out, nrounds);
fpu_kern_leave();
}
static void
aes_neon_cbc_enc_impl(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16],
uint32_t nrounds)
{
if (nbytes == 0)
return;
fpu_kern_enter();
aes_neon_cbc_enc(enc, in, out, nbytes, iv, nrounds);
fpu_kern_leave();
}
static void
aes_neon_cbc_dec_impl(const struct aesdec *dec, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16],
uint32_t nrounds)
{
if (nbytes == 0)
return;
fpu_kern_enter();
aes_neon_cbc_dec(dec, in, out, nbytes, iv, nrounds);
fpu_kern_leave();
}
static void
aes_neon_xts_enc_impl(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16],
uint32_t nrounds)
{
if (nbytes == 0)
return;
fpu_kern_enter();
aes_neon_xts_enc(enc, in, out, nbytes, iv, nrounds);
fpu_kern_leave();
}
static void
aes_neon_xts_dec_impl(const struct aesdec *dec, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t iv[static 16],
uint32_t nrounds)
{
if (nbytes == 0)
return;
fpu_kern_enter();
aes_neon_xts_dec(dec, in, out, nbytes, iv, nrounds);
fpu_kern_leave();
}
static void
aes_neon_cbcmac_update1_impl(const struct aesenc *enc,
const uint8_t in[static 16], size_t nbytes, uint8_t auth[static 16],
uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_cbcmac_update1(enc, in, nbytes, auth, nrounds);
fpu_kern_leave();
}
static void
aes_neon_ccm_enc1_impl(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t authctr[static 32],
uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_ccm_enc1(enc, in, out, nbytes, authctr, nrounds);
fpu_kern_leave();
}
static void
aes_neon_ccm_dec1_impl(const struct aesenc *enc, const uint8_t in[static 16],
uint8_t out[static 16], size_t nbytes, uint8_t authctr[static 32],
uint32_t nrounds)
{
fpu_kern_enter();
aes_neon_ccm_dec1(enc, in, out, nbytes, authctr, nrounds);
fpu_kern_leave();
}
static int
aes_neon_probe(void)
{
#ifdef __aarch64__
struct aarch64_sysctl_cpu_id *id;
#endif
int result = 0;
/* Verify that the CPU supports NEON. */
#ifdef __aarch64__
#ifdef _KERNEL
id = &curcpu()->ci_id;
#else
struct aarch64_sysctl_cpu_id ids;
size_t idlen;
id = &ids;
idlen = sizeof ids;
if (sysctlbyname("machdep.cpu0.cpu_id", id, &idlen, NULL, 0))
return -1;
if (idlen != sizeof ids)
return -1;
#endif
switch (__SHIFTOUT(id->ac_aa64pfr0, ID_AA64PFR0_EL1_ADVSIMD)) {
case ID_AA64PFR0_EL1_ADV_SIMD_NONE:
return -1;
default:
break;
}
#else
#ifdef _KERNEL
if (!cpu_neon_present)
return -1;
#else
int neon;
size_t neonlen = sizeof neon;
if (0 && sysctlbyname("machdep.neon_present", &neon, &neonlen, NULL, 0))
return -1;
if (0 && !neon)
return -1;
#endif
#endif
fpu_kern_enter();
result = aes_neon_selftest();
fpu_kern_leave();
return result;
}
struct aes_impl aes_neon_impl = {
.ai_name = "ARM NEON vpaes",
.ai_probe = aes_neon_probe,
.ai_setenckey = aes_neon_setenckey_impl,
.ai_setdeckey = aes_neon_setdeckey_impl,
.ai_enc = aes_neon_enc_impl,
.ai_dec = aes_neon_dec_impl,
.ai_cbc_enc = aes_neon_cbc_enc_impl,
.ai_cbc_dec = aes_neon_cbc_dec_impl,
.ai_xts_enc = aes_neon_xts_enc_impl,
.ai_xts_dec = aes_neon_xts_dec_impl,
.ai_cbcmac_update1 = aes_neon_cbcmac_update1_impl,
.ai_ccm_enc1 = aes_neon_ccm_enc1_impl,
.ai_ccm_dec1 = aes_neon_ccm_dec1_impl,
};