From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 18F89A0C47; Wed, 27 Oct 2021 18:17:06 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 09F50410DC; Wed, 27 Oct 2021 18:17:06 +0200 (CEST) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by mails.dpdk.org (Postfix) with ESMTP id 80D8140DDA for ; Wed, 27 Oct 2021 18:17:03 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10150"; a="293660814" X-IronPort-AV: E=Sophos;i="5.87,187,1631602800"; d="scan'208";a="293660814" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2021 09:16:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,187,1631602800"; d="scan'208";a="665053516" Received: from silpixa00400072.ir.intel.com ([10.237.222.213]) by orsmga005.jf.intel.com with ESMTP; 27 Oct 2021 09:16:51 -0700 From: Vladimir Medvedkin To: dev@dpdk.org Cc: yipeng1.wang@intel.com, sameh.gobriel@intel.com, bruce.richardson@intel.com, konstantin.ananyev@intel.com, stephen@networkplumber.org, thomas@monjalon.net Date: Wed, 27 Oct 2021 17:16:45 +0100 Message-Id: <1635351408-168116-2-git-send-email-vladimir.medvedkin@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1635351408-168116-1-git-send-email-vladimir.medvedkin@intel.com> References: <1635351408-168116-1-git-send-email-vladimir.medvedkin@intel.com> In-Reply-To: <1630944239-363648-1-git-send-email-vladimir.medvedkin@intel.com> References: <1630944239-363648-1-git-send-email-vladimir.medvedkin@intel.com> Subject: [dpdk-dev] [PATCH v7 1/4] hash: add new toeplitz hash implementation X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" This patch add a new Toeplitz hash implementation using Galios Fields New Instructions (GFNI). Signed-off-by: Vladimir Medvedkin Acked-by: Konstantin Ananyev --- app/test/test_thash.c | 172 ++++++++++++++++++++++++++ doc/api/doxy-api-index.md | 1 + doc/guides/prog_guide/toeplitz_hash_lib.rst | 28 ++++- doc/guides/rel_notes/release_21_11.rst | 4 + lib/hash/meson.build | 6 +- lib/hash/rte_thash.c | 29 +++++ lib/hash/rte_thash.h | 35 ++++++ lib/hash/rte_thash_gfni.h | 54 +++++++++ lib/hash/rte_thash_x86_gfni.h | 182 ++++++++++++++++++++++++++++ lib/hash/version.map | 5 + 10 files changed, 511 insertions(+), 5 deletions(-) create mode 100644 lib/hash/rte_thash_gfni.h create mode 100644 lib/hash/rte_thash_x86_gfni.h diff --git a/app/test/test_thash.c b/app/test/test_thash.c index d8981fb..22d784e 100644 --- a/app/test/test_thash.c +++ b/app/test/test_thash.c @@ -6,6 +6,7 @@ #include #include #include +#include #include "test.h" @@ -78,6 +79,34 @@ uint8_t default_rss_key[] = { 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, }; +static const uint8_t big_rss_key[] = { + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, + 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, +}; + static int test_toeplitz_hash_calc(void) { @@ -145,6 +174,146 @@ test_toeplitz_hash_calc(void) } static int +test_toeplitz_hash_gfni(void) +{ + uint32_t i, j; + union rte_thash_tuple tuple; + uint32_t rss_l3, rss_l3l4; + uint64_t rss_key_matrixes[RTE_DIM(default_rss_key)]; + + if (!rte_thash_gfni_supported()) + return TEST_SKIPPED; + + /* Convert RSS key into matrixes */ + rte_thash_complete_matrix(rss_key_matrixes, default_rss_key, + RTE_DIM(default_rss_key)); + + for (i = 0; i < RTE_DIM(v4_tbl); i++) { + tuple.v4.src_addr = rte_cpu_to_be_32(v4_tbl[i].src_ip); + tuple.v4.dst_addr = rte_cpu_to_be_32(v4_tbl[i].dst_ip); + tuple.v4.sport = rte_cpu_to_be_16(v4_tbl[i].dst_port); + tuple.v4.dport = rte_cpu_to_be_16(v4_tbl[i].src_port); + + rss_l3 = rte_thash_gfni(rss_key_matrixes, (uint8_t *)&tuple, + RTE_THASH_V4_L3_LEN * 4); + rss_l3l4 = rte_thash_gfni(rss_key_matrixes, (uint8_t *)&tuple, + RTE_THASH_V4_L4_LEN * 4); + if ((rss_l3 != v4_tbl[i].hash_l3) || + (rss_l3l4 != v4_tbl[i].hash_l3l4)) + return -TEST_FAILED; + } + + for (i = 0; i < RTE_DIM(v6_tbl); i++) { + for (j = 0; j < RTE_DIM(tuple.v6.src_addr); j++) + tuple.v6.src_addr[j] = v6_tbl[i].src_ip[j]; + for (j = 0; j < RTE_DIM(tuple.v6.dst_addr); j++) + tuple.v6.dst_addr[j] = v6_tbl[i].dst_ip[j]; + tuple.v6.sport = rte_cpu_to_be_16(v6_tbl[i].dst_port); + tuple.v6.dport = rte_cpu_to_be_16(v6_tbl[i].src_port); + rss_l3 = rte_thash_gfni(rss_key_matrixes, (uint8_t *)&tuple, + RTE_THASH_V6_L3_LEN * 4); + rss_l3l4 = rte_thash_gfni(rss_key_matrixes, (uint8_t *)&tuple, + RTE_THASH_V6_L4_LEN * 4); + if ((rss_l3 != v6_tbl[i].hash_l3) || + (rss_l3l4 != v6_tbl[i].hash_l3l4)) + return -TEST_FAILED; + } + + return TEST_SUCCESS; +} + +#define DATA_SZ 4 +#define ITER 1000 + +enum { + SCALAR_DATA_BUF_1_HASH_IDX = 0, + SCALAR_DATA_BUF_2_HASH_IDX, + GFNI_DATA_BUF_1_HASH_IDX, + GFNI_DATA_BUF_2_HASH_IDX, + HASH_IDXES +}; + +static int +test_toeplitz_hash_rand_data(void) +{ + uint32_t data[2][DATA_SZ]; + uint32_t scalar_data[2][DATA_SZ]; + uint32_t hash[HASH_IDXES] = { 0 }; + uint64_t rss_key_matrixes[RTE_DIM(default_rss_key)]; + int i, j; + + if (!rte_thash_gfni_supported()) + return TEST_SKIPPED; + + rte_thash_complete_matrix(rss_key_matrixes, default_rss_key, + RTE_DIM(default_rss_key)); + + for (i = 0; i < ITER; i++) { + for (j = 0; j < DATA_SZ; j++) { + data[0][j] = rte_rand(); + data[1][j] = rte_rand(); + scalar_data[0][j] = rte_cpu_to_be_32(data[0][j]); + scalar_data[1][j] = rte_cpu_to_be_32(data[1][j]); + } + + hash[SCALAR_DATA_BUF_1_HASH_IDX] = rte_softrss(scalar_data[0], + DATA_SZ, default_rss_key); + hash[SCALAR_DATA_BUF_2_HASH_IDX] = rte_softrss(scalar_data[1], + DATA_SZ, default_rss_key); + hash[GFNI_DATA_BUF_1_HASH_IDX] = rte_thash_gfni( + rss_key_matrixes, (uint8_t *)data[0], + DATA_SZ * sizeof(uint32_t)); + hash[GFNI_DATA_BUF_2_HASH_IDX] = rte_thash_gfni( + rss_key_matrixes, (uint8_t *)data[1], + DATA_SZ * sizeof(uint32_t)); + + if ((hash[SCALAR_DATA_BUF_1_HASH_IDX] != + hash[GFNI_DATA_BUF_1_HASH_IDX]) || + (hash[SCALAR_DATA_BUF_2_HASH_IDX] != + hash[GFNI_DATA_BUF_2_HASH_IDX])) + + return -TEST_FAILED; + } + + return TEST_SUCCESS; +} + +enum { + RSS_V4_IDX, + RSS_V6_IDX +}; + +static int +test_big_tuple_gfni(void) +{ + uint32_t arr[16]; + uint32_t arr_softrss[16]; + uint32_t hash_1, hash_2; + uint64_t rss_key_matrixes[RTE_DIM(big_rss_key)]; + unsigned int i, size = RTE_DIM(arr) * sizeof(uint32_t); + + if (!rte_thash_gfni_supported()) + return TEST_SKIPPED; + + /* Convert RSS key into matrixes */ + rte_thash_complete_matrix(rss_key_matrixes, big_rss_key, + RTE_DIM(big_rss_key)); + + for (i = 0; i < RTE_DIM(arr); i++) { + arr[i] = rte_rand(); + arr_softrss[i] = rte_be_to_cpu_32(arr[i]); + } + + hash_1 = rte_softrss(arr_softrss, RTE_DIM(arr), big_rss_key); + hash_2 = rte_thash_gfni(rss_key_matrixes, (uint8_t *)arr, size); + + if (hash_1 != hash_2) + return -TEST_FAILED; + + return TEST_SUCCESS; +} + +static int test_create_invalid(void) { struct rte_thash_ctx *ctx; @@ -577,6 +746,9 @@ static struct unit_test_suite thash_tests = { .teardown = NULL, .unit_test_cases = { TEST_CASE(test_toeplitz_hash_calc), + TEST_CASE(test_toeplitz_hash_gfni), + TEST_CASE(test_toeplitz_hash_rand_data), + TEST_CASE(test_big_tuple_gfni), TEST_CASE(test_create_invalid), TEST_CASE(test_multiple_create), TEST_CASE(test_free_null), diff --git a/doc/api/doxy-api-index.md b/doc/api/doxy-api-index.md index 49892a3..4245b96 100644 --- a/doc/api/doxy-api-index.md +++ b/doc/api/doxy-api-index.md @@ -142,6 +142,7 @@ The public API headers are grouped by topics: [hash] (@ref rte_hash.h), [jhash] (@ref rte_jhash.h), [thash] (@ref rte_thash.h), + [thash_gfni] (@ref rte_thash_gfni.h), [FBK hash] (@ref rte_fbk_hash.h), [CRC hash] (@ref rte_hash_crc.h) diff --git a/doc/guides/prog_guide/toeplitz_hash_lib.rst b/doc/guides/prog_guide/toeplitz_hash_lib.rst index f916857..acdd8c3 100644 --- a/doc/guides/prog_guide/toeplitz_hash_lib.rst +++ b/doc/guides/prog_guide/toeplitz_hash_lib.rst @@ -19,24 +19,44 @@ to calculate the RSS hash sum to spread the traffic among the queues. Toeplitz hash function API -------------------------- -There are two functions that provide calculation of the Toeplitz hash sum: +There are three functions that provide calculation of the Toeplitz hash sum: * ``rte_softrss()`` * ``rte_softrss_be()`` +* ``rte_thash_gfni()`` -Both of these functions take the parameters: +First two functions are scalar implementation and take the parameters: * A pointer to the tuple, containing fields extracted from the packet. * A length of this tuple counted in double words. * A pointer to the RSS hash key corresponding to the one installed on the NIC. -Both functions expect the tuple to be in "host" byte order -and a multiple of 4 bytes in length. +Both of above mentioned _softrss_ functions expect the tuple to be in +"host" byte order and a multiple of 4 bytes in length. The ``rte_softrss()`` function expects the ``rss_key`` to be exactly the same as the one installed on the NIC. The ``rte_softrss_be`` function is a faster implementation, but it expects ``rss_key`` to be converted to the host byte order. +The last function is vectorized implementation using +Galois Fields New Instructions. Could be used if ``rte_thash_gfni_supported`` returns true. +It expects the tuple to be in network byte order. + +``rte_thash_gfni()`` calculates the hash value for a single tuple + +``rte_thash_gfni()`` takes the parameters: + +* A pointer to the matrices derived from the RSS hash key using ``rte_thash_complete_matrix()``. +* A pointer to the tuple. +* A length of the tuple in bytes. + +``rte_thash_complete_matrix()`` is a function that calculates matrices required by +GFNI implementations from the RSS hash key. It takes the parameters: + +* A pointer to the memory where the matrices will be written. +* A pointer to the RSS hash key. +* Length of the RSS hash key in bytes. + Predictable RSS --------------- diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst index 1ccac87..4daeb4a 100644 --- a/doc/guides/rel_notes/release_21_11.rst +++ b/doc/guides/rel_notes/release_21_11.rst @@ -305,6 +305,10 @@ New Features * Pcapng format with timestamps and meta-data. * Fixes packet capture with stripped VLAN tags. +* **Added optimized Toeplitz hash implementation.** + + Added optimized Toeplitz hash implementation using Galois Fields New Instructions. + Removed Items ------------- diff --git a/lib/hash/meson.build b/lib/hash/meson.build index 9bc5ef9..12b1afc 100644 --- a/lib/hash/meson.build +++ b/lib/hash/meson.build @@ -7,8 +7,12 @@ headers = files( 'rte_hash.h', 'rte_jhash.h', 'rte_thash.h', + 'rte_thash_gfni.h', +) +indirect_headers += files( + 'rte_crc_arm64.h', + 'rte_thash_x86_gfni.h', ) -indirect_headers += files('rte_crc_arm64.h') sources = files('rte_cuckoo_hash.c', 'rte_fbk_hash.c', 'rte_thash.c') deps += ['net'] diff --git a/lib/hash/rte_thash.c b/lib/hash/rte_thash.c index 696a112..e605a6f 100644 --- a/lib/hash/rte_thash.c +++ b/lib/hash/rte_thash.c @@ -90,6 +90,35 @@ struct rte_thash_ctx { uint8_t hash_key[0]; }; +int +rte_thash_gfni_supported(void) +{ +#ifdef RTE_THASH_GFNI_DEFINED + if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_GFNI) && + (rte_vect_get_max_simd_bitwidth() >= + RTE_VECT_SIMD_512)) + return 1; +#endif + + return 0; +}; + +void +rte_thash_complete_matrix(uint64_t *matrixes, const uint8_t *rss_key, int size) +{ + int i, j; + uint8_t *m = (uint8_t *)matrixes; + uint8_t left_part, right_part; + + for (i = 0; i < size; i++) { + for (j = 0; j < 8; j++) { + left_part = rss_key[i] << j; + right_part = (uint16_t)(rss_key[i + 1]) >> (8 - j); + m[i * 8 + j] = left_part|right_part; + } + } +} + static inline uint32_t get_bit_lfsr(struct thash_lfsr *lfsr) { diff --git a/lib/hash/rte_thash.h b/lib/hash/rte_thash.h index a26fe56..40146cf 100644 --- a/lib/hash/rte_thash.h +++ b/lib/hash/rte_thash.h @@ -24,6 +24,7 @@ extern "C" { #include #include #include +#include #if defined(RTE_ARCH_X86) || defined(__ARM_NEON) #include @@ -219,6 +220,40 @@ rte_softrss_be(uint32_t *input_tuple, uint32_t input_len, return ret; } +/** + * Indicates if GFNI implementations of the Toeplitz hash are supported. + * + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * @return + * 1 if GFNI is supported + * 0 otherwise + */ +__rte_experimental +int +rte_thash_gfni_supported(void); + +/** + * Converts Toeplitz hash key (RSS key) into matrixes required + * for GFNI implementation + * + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * @param matrixes + * pointer to the memory where matrices will be written. + * Note: the size of this memory must be equal to size * 8 + * @param rss_key + * pointer to the Toeplitz hash key + * @param size + * Size of the rss_key in bytes. + */ +__rte_experimental +void +rte_thash_complete_matrix(uint64_t *matrixes, const uint8_t *rss_key, + int size); + /** @internal Logarithm of minimum size of the RSS ReTa */ #define RTE_THASH_RETA_SZ_MIN 2U /** @internal Logarithm of maximum size of the RSS ReTa */ diff --git a/lib/hash/rte_thash_gfni.h b/lib/hash/rte_thash_gfni.h new file mode 100644 index 0000000..bbacd41 --- /dev/null +++ b/lib/hash/rte_thash_gfni.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2021 Intel Corporation + */ + +#ifndef _RTE_THASH_GFNI_H_ +#define _RTE_THASH_GFNI_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +#ifdef RTE_ARCH_X86 + +#include + +#endif + +#ifndef RTE_THASH_GFNI_DEFINED + +/** + * Calculate Toeplitz hash. + * Dummy implementation. + * + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * @param m + * Pointer to the matrices generated from the corresponding + * RSS hash key using rte_thash_complete_matrix(). + * @param tuple + * Pointer to the data to be hashed. Data must be in network byte order. + * @param len + * Length of the data to be hashed. + * @return + * Calculated Toeplitz hash value. + */ +__rte_experimental +static inline uint32_t +rte_thash_gfni(const uint64_t *mtrx __rte_unused, + const uint8_t *key __rte_unused, int len __rte_unused) +{ + RTE_LOG(ERR, HASH, "%s is undefined under given arch\n", __func__); + return 0; +} + +#endif /* RTE_THASH_GFNI_DEFINED */ + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_THASH_GFNI_H_ */ diff --git a/lib/hash/rte_thash_x86_gfni.h b/lib/hash/rte_thash_x86_gfni.h new file mode 100644 index 0000000..1cb7353 --- /dev/null +++ b/lib/hash/rte_thash_x86_gfni.h @@ -0,0 +1,182 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2021 Intel Corporation + */ + +#ifndef _RTE_THASH_X86_GFNI_H_ +#define _RTE_THASH_X86_GFNI_H_ + +/** + * @file + * + * Optimized Toeplitz hash functions implementation + * using Galois Fields New Instructions. + */ + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef __GFNI__ +#define RTE_THASH_GFNI_DEFINED + +#define RTE_THASH_FIRST_ITER_MSK 0x0f0f0f0f0f0e0c08 +#define RTE_THASH_PERM_MSK 0x0f0f0f0f0f0f0f0f +#define RTE_THASH_FIRST_ITER_MSK_2 0xf0f0f0f0f0e0c080 +#define RTE_THASH_PERM_MSK_2 0xf0f0f0f0f0f0f0f0 +#define RTE_THASH_REWIND_MSK 0x0000000000113377 + +__rte_internal +static inline void +__rte_thash_xor_reduce(__m512i xor_acc, uint32_t *val_1, uint32_t *val_2) +{ + __m256i tmp_256_1, tmp_256_2; + __m128i tmp128_1, tmp128_2; + uint64_t tmp_1, tmp_2; + + tmp_256_1 = _mm512_castsi512_si256(xor_acc); + tmp_256_2 = _mm512_extracti32x8_epi32(xor_acc, 1); + tmp_256_1 = _mm256_xor_si256(tmp_256_1, tmp_256_2); + + tmp128_1 = _mm256_castsi256_si128(tmp_256_1); + tmp128_2 = _mm256_extracti32x4_epi32(tmp_256_1, 1); + tmp128_1 = _mm_xor_si128(tmp128_1, tmp128_2); + + tmp_1 = _mm_extract_epi64(tmp128_1, 0); + tmp_2 = _mm_extract_epi64(tmp128_1, 1); + tmp_1 ^= tmp_2; + + *val_1 = (uint32_t)tmp_1; + *val_2 = (uint32_t)(tmp_1 >> 32); +} + +__rte_internal +static inline __m512i +__rte_thash_gfni(const uint64_t *mtrx, const uint8_t *tuple, + const uint8_t *secondary_tuple, int len) +{ + __m512i permute_idx = _mm512_set_epi8(7, 6, 5, 4, 7, 6, 5, 4, + 6, 5, 4, 3, 6, 5, 4, 3, + 5, 4, 3, 2, 5, 4, 3, 2, + 4, 3, 2, 1, 4, 3, 2, 1, + 3, 2, 1, 0, 3, 2, 1, 0, + 2, 1, 0, -1, 2, 1, 0, -1, + 1, 0, -1, -2, 1, 0, -1, -2, + 0, -1, -2, -3, 0, -1, -2, -3); + + const __m512i rewind_idx = _mm512_set_epi8(0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 59, 0, 0, 0, 59, + 0, 0, 59, 58, 0, 0, 59, 58, + 0, 59, 58, 57, 0, 59, 58, 57); + const __mmask64 rewind_mask = RTE_THASH_REWIND_MSK; + const __m512i shift_8 = _mm512_set1_epi8(8); + __m512i xor_acc = _mm512_setzero_si512(); + __m512i perm_bytes = _mm512_setzero_si512(); + __m512i vals, matrixes, tuple_bytes, tuple_bytes_2; + __mmask64 load_mask, permute_mask, permute_mask_2; + int chunk_len = 0, i = 0; + uint8_t mtrx_msk; + const int prepend = 3; + + for (; len > 0; len -= 64, tuple += 64) { + if (i == 8) + perm_bytes = _mm512_maskz_permutexvar_epi8(rewind_mask, + rewind_idx, perm_bytes); + + permute_mask = RTE_THASH_FIRST_ITER_MSK; + load_mask = (len >= 64) ? UINT64_MAX : ((1ULL << len) - 1); + tuple_bytes = _mm512_maskz_loadu_epi8(load_mask, tuple); + if (secondary_tuple) { + permute_mask_2 = RTE_THASH_FIRST_ITER_MSK_2; + tuple_bytes_2 = _mm512_maskz_loadu_epi8(load_mask, + secondary_tuple); + } + + chunk_len = __builtin_popcountll(load_mask); + for (i = 0; i < ((chunk_len + prepend) / 8); i++, mtrx += 8) { + perm_bytes = _mm512_mask_permutexvar_epi8(perm_bytes, + permute_mask, permute_idx, tuple_bytes); + + if (secondary_tuple) + perm_bytes = + _mm512_mask_permutexvar_epi8(perm_bytes, + permute_mask_2, permute_idx, + tuple_bytes_2); + + matrixes = _mm512_maskz_loadu_epi64(UINT8_MAX, mtrx); + vals = _mm512_gf2p8affine_epi64_epi8(perm_bytes, + matrixes, 0); + + xor_acc = _mm512_xor_si512(xor_acc, vals); + permute_idx = _mm512_add_epi8(permute_idx, shift_8); + permute_mask = RTE_THASH_PERM_MSK; + if (secondary_tuple) + permute_mask_2 = RTE_THASH_PERM_MSK_2; + } + } + + int rest_len = (chunk_len + prepend) % 8; + if (rest_len != 0) { + mtrx_msk = (1 << (rest_len % 8)) - 1; + matrixes = _mm512_maskz_loadu_epi64(mtrx_msk, mtrx); + if (i == 8) { + perm_bytes = _mm512_maskz_permutexvar_epi8(rewind_mask, + rewind_idx, perm_bytes); + } else { + perm_bytes = _mm512_mask_permutexvar_epi8(perm_bytes, + permute_mask, permute_idx, tuple_bytes); + + if (secondary_tuple) + perm_bytes = + _mm512_mask_permutexvar_epi8( + perm_bytes, permute_mask_2, + permute_idx, tuple_bytes_2); + } + + vals = _mm512_gf2p8affine_epi64_epi8(perm_bytes, matrixes, 0); + xor_acc = _mm512_xor_si512(xor_acc, vals); + } + + return xor_acc; +} + +/** + * Calculate Toeplitz hash. + * + * @warning + * @b EXPERIMENTAL: this API may change without prior notice. + * + * @param m + * Pointer to the matrices generated from the corresponding + * RSS hash key using rte_thash_complete_matrix(). + * @param tuple + * Pointer to the data to be hashed. Data must be in network byte order. + * @param len + * Length of the data to be hashed. + * @return + * Calculated Toeplitz hash value. + */ +__rte_experimental +static inline uint32_t +rte_thash_gfni(const uint64_t *m, const uint8_t *tuple, int len) +{ + uint32_t val, val_zero; + + __m512i xor_acc = __rte_thash_gfni(m, tuple, NULL, len); + __rte_thash_xor_reduce(xor_acc, &val, &val_zero); + + return val; +} + +#endif /* _GFNI_ */ + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_THASH_X86_GFNI_H_ */ diff --git a/lib/hash/version.map b/lib/hash/version.map index 8185470..153ab87 100644 --- a/lib/hash/version.map +++ b/lib/hash/version.map @@ -37,6 +37,7 @@ DPDK_22 { EXPERIMENTAL { global: + #added in 21.05 rte_thash_add_helper; rte_thash_adjust_tuple; rte_thash_find_existing; @@ -45,4 +46,8 @@ EXPERIMENTAL { rte_thash_get_helper; rte_thash_get_key; rte_thash_init_ctx; + + #added in 21.11 + rte_thash_complete_matrix; + rte_thash_gfni_supported; }; -- 2.7.4