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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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 "acl_run_sse.h"
static const rte_ymm_t ymm_match_mask = {
.u32 = {
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
RTE_ACL_NODE_MATCH,
},
};
static const rte_ymm_t ymm_index_mask = {
.u32 = {
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
RTE_ACL_NODE_INDEX,
},
};
static const rte_ymm_t ymm_shuffle_input = {
.u32 = {
0x00000000, 0x04040404, 0x08080808, 0x0c0c0c0c,
0x00000000, 0x04040404, 0x08080808, 0x0c0c0c0c,
},
};
static const rte_ymm_t ymm_ones_16 = {
.u16 = {
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
},
};
static const rte_ymm_t ymm_range_base = {
.u32 = {
0xffffff00, 0xffffff04, 0xffffff08, 0xffffff0c,
0xffffff00, 0xffffff04, 0xffffff08, 0xffffff0c,
},
};
/*
* Process 8 transitions in parallel.
* tr_lo contains low 32 bits for 8 transition.
* tr_hi contains high 32 bits for 8 transition.
* next_input contains up to 4 input bytes for 8 flows.
*/
static __rte_always_inline ymm_t
transition8(ymm_t next_input, const uint64_t *trans, ymm_t *tr_lo, ymm_t *tr_hi)
{
const int32_t *tr;
ymm_t addr;
tr = (const int32_t *)(uintptr_t)trans;
/* Calculate the address (array index) for all 8 transitions. */
ACL_TR_CALC_ADDR(mm256, 256, addr, ymm_index_mask.y, next_input,
ymm_shuffle_input.y, ymm_ones_16.y, ymm_range_base.y,
*tr_lo, *tr_hi);
/* load lower 32 bits of 8 transactions at once. */
*tr_lo = _mm256_i32gather_epi32(tr, addr, sizeof(trans[0]));
next_input = _mm256_srli_epi32(next_input, CHAR_BIT);
/* load high 32 bits of 8 transactions at once. */
*tr_hi = _mm256_i32gather_epi32(tr + 1, addr, sizeof(trans[0]));
return next_input;
}
/*
* Process matches for 8 flows.
* tr_lo contains low 32 bits for 8 transition.
* tr_hi contains high 32 bits for 8 transition.
*/
static inline void
acl_process_matches_avx2x8(const struct rte_acl_ctx *ctx,
struct parms *parms, struct acl_flow_data *flows, uint32_t slot,
ymm_t matches, ymm_t *tr_lo, ymm_t *tr_hi)
{
ymm_t t0, t1;
ymm_t lo, hi;
xmm_t l0, l1;
uint32_t i;
uint64_t tr[MAX_SEARCHES_SSE8];
l1 = _mm256_extracti128_si256(*tr_lo, 1);
l0 = _mm256_castsi256_si128(*tr_lo);
for (i = 0; i != RTE_DIM(tr) / 2; i++) {
/*
* Extract low 32bits of each transition.
* That's enough to process the match.
*/
tr[i] = (uint32_t)_mm_cvtsi128_si32(l0);
tr[i + 4] = (uint32_t)_mm_cvtsi128_si32(l1);
l0 = _mm_srli_si128(l0, sizeof(uint32_t));
l1 = _mm_srli_si128(l1, sizeof(uint32_t));
tr[i] = acl_match_check(tr[i], slot + i,
ctx, parms, flows, resolve_priority_sse);
tr[i + 4] = acl_match_check(tr[i + 4], slot + i + 4,
ctx, parms, flows, resolve_priority_sse);
}
/* Collect new transitions into 2 YMM registers. */
t0 = _mm256_set_epi64x(tr[5], tr[4], tr[1], tr[0]);
t1 = _mm256_set_epi64x(tr[7], tr[6], tr[3], tr[2]);
/* For each transition: put low 32 into tr_lo and high 32 into tr_hi */
ACL_TR_HILO(mm256, __m256, t0, t1, lo, hi);
/* Keep transitions wth NOMATCH intact. */
*tr_lo = _mm256_blendv_epi8(*tr_lo, lo, matches);
*tr_hi = _mm256_blendv_epi8(*tr_hi, hi, matches);
}
static inline void
acl_match_check_avx2x8(const struct rte_acl_ctx *ctx, struct parms *parms,
struct acl_flow_data *flows, uint32_t slot,
ymm_t *tr_lo, ymm_t *tr_hi, ymm_t match_mask)
{
uint32_t msk;
ymm_t matches, temp;
/* test for match node */
temp = _mm256_and_si256(match_mask, *tr_lo);
matches = _mm256_cmpeq_epi32(temp, match_mask);
msk = _mm256_movemask_epi8(matches);
while (msk != 0) {
acl_process_matches_avx2x8(ctx, parms, flows, slot,
matches, tr_lo, tr_hi);
temp = _mm256_and_si256(match_mask, *tr_lo);
matches = _mm256_cmpeq_epi32(temp, match_mask);
msk = _mm256_movemask_epi8(matches);
}
}
/*
* Execute trie traversal for up to 16 flows in parallel.
*/
static inline int
search_avx2x16(const struct rte_acl_ctx *ctx, const uint8_t **data,
uint32_t *results, uint32_t total_packets, uint32_t categories)
{
uint32_t n;
struct acl_flow_data flows;
uint64_t index_array[MAX_SEARCHES_AVX16];
struct completion cmplt[MAX_SEARCHES_AVX16];
struct parms parms[MAX_SEARCHES_AVX16];
ymm_t input[2], tr_lo[2], tr_hi[2];
ymm_t t0, t1;
acl_set_flow(&flows, cmplt, RTE_DIM(cmplt), data, results,
total_packets, categories, ctx->trans_table);
for (n = 0; n < RTE_DIM(cmplt); n++) {
cmplt[n].count = 0;
index_array[n] = acl_start_next_trie(&flows, parms, n, ctx);
}
t0 = _mm256_set_epi64x(index_array[5], index_array[4],
index_array[1], index_array[0]);
t1 = _mm256_set_epi64x(index_array[7], index_array[6],
index_array[3], index_array[2]);
ACL_TR_HILO(mm256, __m256, t0, t1, tr_lo[0], tr_hi[0]);
t0 = _mm256_set_epi64x(index_array[13], index_array[12],
index_array[9], index_array[8]);
t1 = _mm256_set_epi64x(index_array[15], index_array[14],
index_array[11], index_array[10]);
ACL_TR_HILO(mm256, __m256, t0, t1, tr_lo[1], tr_hi[1]);
/* Check for any matches. */
acl_match_check_avx2x8(ctx, parms, &flows, 0, &tr_lo[0], &tr_hi[0],
ymm_match_mask.y);
acl_match_check_avx2x8(ctx, parms, &flows, 8, &tr_lo[1], &tr_hi[1],
ymm_match_mask.y);
while (flows.started > 0) {
uint32_t in[MAX_SEARCHES_SSE8];
/* Gather 4 bytes of input data for first 8 flows. */
in[0] = GET_NEXT_4BYTES(parms, 0);
in[4] = GET_NEXT_4BYTES(parms, 4);
in[1] = GET_NEXT_4BYTES(parms, 1);
in[5] = GET_NEXT_4BYTES(parms, 5);
in[2] = GET_NEXT_4BYTES(parms, 2);
in[6] = GET_NEXT_4BYTES(parms, 6);
in[3] = GET_NEXT_4BYTES(parms, 3);
in[7] = GET_NEXT_4BYTES(parms, 7);
input[0] = _mm256_set_epi32(in[7], in[6], in[5], in[4],
in[3], in[2], in[1], in[0]);
/* Gather 4 bytes of input data for last 8 flows. */
in[0] = GET_NEXT_4BYTES(parms, 8);
in[4] = GET_NEXT_4BYTES(parms, 12);
in[1] = GET_NEXT_4BYTES(parms, 9);
in[5] = GET_NEXT_4BYTES(parms, 13);
in[2] = GET_NEXT_4BYTES(parms, 10);
in[6] = GET_NEXT_4BYTES(parms, 14);
in[3] = GET_NEXT_4BYTES(parms, 11);
in[7] = GET_NEXT_4BYTES(parms, 15);
input[1] = _mm256_set_epi32(in[7], in[6], in[5], in[4],
in[3], in[2], in[1], in[0]);
input[0] = transition8(input[0], flows.trans,
&tr_lo[0], &tr_hi[0]);
input[1] = transition8(input[1], flows.trans,
&tr_lo[1], &tr_hi[1]);
input[0] = transition8(input[0], flows.trans,
&tr_lo[0], &tr_hi[0]);
input[1] = transition8(input[1], flows.trans,
&tr_lo[1], &tr_hi[1]);
input[0] = transition8(input[0], flows.trans,
&tr_lo[0], &tr_hi[0]);
input[1] = transition8(input[1], flows.trans,
&tr_lo[1], &tr_hi[1]);
input[0] = transition8(input[0], flows.trans,
&tr_lo[0], &tr_hi[0]);
input[1] = transition8(input[1], flows.trans,
&tr_lo[1], &tr_hi[1]);
/* Check for any matches. */
acl_match_check_avx2x8(ctx, parms, &flows, 0,
&tr_lo[0], &tr_hi[0], ymm_match_mask.y);
acl_match_check_avx2x8(ctx, parms, &flows, 8,
&tr_lo[1], &tr_hi[1], ymm_match_mask.y);
}
return 0;
}
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