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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2024 Cisco Systems, Inc.
*/
#include <vlib/vlib.h>
#include <vnet/plugin/plugin.h>
#include <vnet/crypto/crypto.h>
#include <crypto_native/crypto_native.h>
#include <vppinfra/crypto/aes_ctr.h>
#if __GNUC__ > 4 && !__clang__ && CLIB_DEBUG == 0
#pragma GCC optimize("O3")
#endif
static_always_inline u32
aes_ops_aes_ctr (vlib_main_t *vm, vnet_crypto_op_t *ops[], u32 n_ops,
vnet_crypto_op_chunk_t *chunks, aes_key_size_t ks,
int maybe_chained)
{
crypto_native_main_t *cm = &crypto_native_main;
vnet_crypto_op_t *op = ops[0];
aes_ctr_key_data_t *kd;
aes_ctr_ctx_t ctx;
u32 n_left = n_ops;
next:
kd = (aes_ctr_key_data_t *) cm->key_data[op->key_index];
clib_aes_ctr_init (&ctx, kd, op->iv, ks);
if (op->flags & VNET_CRYPTO_OP_FLAG_CHAINED_BUFFERS)
{
vnet_crypto_op_chunk_t *chp = chunks + op->chunk_index;
for (int j = 0; j < op->n_chunks; j++, chp++)
clib_aes_ctr_transform (&ctx, chp->src, chp->dst, chp->len, ks);
}
else
clib_aes_ctr_transform (&ctx, op->src, op->dst, op->len, ks);
op->status = VNET_CRYPTO_OP_STATUS_COMPLETED;
if (--n_left)
{
op += 1;
goto next;
}
return n_ops;
}
static_always_inline void *
aes_ctr_key_exp (vnet_crypto_key_t *key, aes_key_size_t ks)
{
aes_ctr_key_data_t *kd;
kd = clib_mem_alloc_aligned (sizeof (*kd), CLIB_CACHE_LINE_BYTES);
clib_aes_ctr_key_expand (kd, key->data, ks);
return kd;
}
#define foreach_aes_ctr_handler_type _ (128) _ (192) _ (256)
#define _(x) \
static u32 aes_ops_aes_ctr_##x (vlib_main_t *vm, vnet_crypto_op_t *ops[], \
u32 n_ops) \
{ \
return aes_ops_aes_ctr (vm, ops, n_ops, 0, AES_KEY_##x, 0); \
} \
static u32 aes_ops_aes_ctr_##x##_chained ( \
vlib_main_t *vm, vnet_crypto_op_t *ops[], vnet_crypto_op_chunk_t *chunks, \
u32 n_ops) \
{ \
return aes_ops_aes_ctr (vm, ops, n_ops, chunks, AES_KEY_##x, 1); \
} \
static void *aes_ctr_key_exp_##x (vnet_crypto_key_t *key) \
{ \
return aes_ctr_key_exp (key, AES_KEY_##x); \
}
foreach_aes_ctr_handler_type;
#undef _
static int
probe ()
{
#if defined(__VAES__) && defined(__AVX512F__)
if (clib_cpu_supports_vaes () && clib_cpu_supports_avx512f ())
return 50;
#elif defined(__VAES__)
if (clib_cpu_supports_vaes ())
return 40;
#elif defined(__AVX512F__)
if (clib_cpu_supports_avx512f ())
return 30;
#elif defined(__AVX2__)
if (clib_cpu_supports_avx2 ())
return 20;
#elif __AES__
if (clib_cpu_supports_aes ())
return 10;
#elif __aarch64__
if (clib_cpu_supports_aarch64_aes ())
return 10;
#endif
return -1;
}
#define _(b) \
CRYPTO_NATIVE_OP_HANDLER (aes_##b##_ctr_enc) = { \
.op_id = VNET_CRYPTO_OP_AES_##b##_CTR_ENC, \
.fn = aes_ops_aes_ctr_##b, \
.cfn = aes_ops_aes_ctr_##b##_chained, \
.probe = probe, \
}; \
\
CRYPTO_NATIVE_OP_HANDLER (aes_##b##_ctr_dec) = { \
.op_id = VNET_CRYPTO_OP_AES_##b##_CTR_DEC, \
.fn = aes_ops_aes_ctr_##b, \
.cfn = aes_ops_aes_ctr_##b##_chained, \
.probe = probe, \
}; \
CRYPTO_NATIVE_KEY_HANDLER (aes_##b##_ctr) = { \
.alg_id = VNET_CRYPTO_ALG_AES_##b##_CTR, \
.key_fn = aes_ctr_key_exp_##b, \
.probe = probe, \
};
_ (128) _ (192) _ (256)
#undef _
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