DPDK 23.11.2
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rte_thash.h
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1/* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2015-2019 Vladimir Medvedkin <medvedkinv@gmail.com>
3 * Copyright(c) 2021 Intel Corporation
4 */
5
6#ifndef _RTE_THASH_H
7#define _RTE_THASH_H
8
18#ifdef __cplusplus
19extern "C" {
20#endif
21
22#include <stdint.h>
23
24#include <rte_byteorder.h>
25#include <rte_ip.h>
26#include <rte_common.h>
27#include <rte_thash_gfni.h>
28
29#if defined(RTE_ARCH_X86) || defined(__ARM_NEON)
30#include <rte_vect.h>
31#endif
32
33#ifdef RTE_ARCH_X86
34/* Byte swap mask used for converting IPv6 address
35 * 4-byte chunks to CPU byte order
36 */
37static const __m128i rte_thash_ipv6_bswap_mask = {
38 0x0405060700010203ULL, 0x0C0D0E0F08090A0BULL};
39#endif
40
45#define RTE_THASH_V4_L3_LEN ((sizeof(struct rte_ipv4_tuple) - \
46 sizeof(((struct rte_ipv4_tuple *)0)->sctp_tag)) / 4)
47
53#define RTE_THASH_V4_L4_LEN ((sizeof(struct rte_ipv4_tuple)) / 4)
54
59#define RTE_THASH_V6_L3_LEN ((sizeof(struct rte_ipv6_tuple) - \
60 sizeof(((struct rte_ipv6_tuple *)0)->sctp_tag)) / 4)
61
67#define RTE_THASH_V6_L4_LEN ((sizeof(struct rte_ipv6_tuple)) / 4)
68
74 uint32_t src_addr;
75 uint32_t dst_addr;
76 union {
77 struct {
78 uint16_t dport;
79 uint16_t sport;
80 };
81 uint32_t sctp_tag;
82 };
83};
84
91 uint8_t src_addr[16];
92 uint8_t dst_addr[16];
93 union {
94 struct {
95 uint16_t dport;
96 uint16_t sport;
97 };
98 uint32_t sctp_tag;
99 };
100};
101
102union rte_thash_tuple {
103 struct rte_ipv4_tuple v4;
104 struct rte_ipv6_tuple v6;
105#ifdef RTE_ARCH_X86
106} __rte_aligned(XMM_SIZE);
107#else
108};
109#endif
110
120static inline void
121rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len)
122{
123 int i;
124
125 for (i = 0; i < (len >> 2); i++)
126 targ[i] = rte_be_to_cpu_32(orig[i]);
127}
128
137static inline void
139 union rte_thash_tuple *targ)
140{
141#ifdef RTE_ARCH_X86
142 __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig->src_addr);
143 *(__m128i *)targ->v6.src_addr =
144 _mm_shuffle_epi8(ipv6, rte_thash_ipv6_bswap_mask);
145 ipv6 = _mm_loadu_si128((const __m128i *)orig->dst_addr);
146 *(__m128i *)targ->v6.dst_addr =
147 _mm_shuffle_epi8(ipv6, rte_thash_ipv6_bswap_mask);
148#elif defined(__ARM_NEON)
149 uint8x16_t ipv6 = vld1q_u8((uint8_t const *)orig->src_addr);
150 vst1q_u8((uint8_t *)targ->v6.src_addr, vrev32q_u8(ipv6));
151 ipv6 = vld1q_u8((uint8_t const *)orig->dst_addr);
152 vst1q_u8((uint8_t *)targ->v6.dst_addr, vrev32q_u8(ipv6));
153#else
154 int i;
155 for (i = 0; i < 4; i++) {
156 *((uint32_t *)targ->v6.src_addr + i) =
157 rte_be_to_cpu_32(*((const uint32_t *)orig->src_addr + i));
158 *((uint32_t *)targ->v6.dst_addr + i) =
159 rte_be_to_cpu_32(*((const uint32_t *)orig->dst_addr + i));
160 }
161#endif
162}
163
175static inline uint32_t
176rte_softrss(uint32_t *input_tuple, uint32_t input_len,
177 const uint8_t *rss_key)
178{
179 uint32_t i, j, map, ret = 0;
180
181 for (j = 0; j < input_len; j++) {
182 for (map = input_tuple[j]; map; map &= (map - 1)) {
183 i = rte_bsf32(map);
184 ret ^= rte_cpu_to_be_32(((const uint32_t *)rss_key)[j]) << (31 - i) |
185 (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t *)rss_key)[j + 1])) >>
186 (i + 1));
187 }
188 }
189 return ret;
190}
191
205static inline uint32_t
206rte_softrss_be(uint32_t *input_tuple, uint32_t input_len,
207 const uint8_t *rss_key)
208{
209 uint32_t i, j, map, ret = 0;
210
211 for (j = 0; j < input_len; j++) {
212 for (map = input_tuple[j]; map; map &= (map - 1)) {
213 i = rte_bsf32(map);
214 ret ^= ((const uint32_t *)rss_key)[j] << (31 - i) |
215 (uint32_t)((uint64_t)(((const uint32_t *)rss_key)[j + 1]) >> (i + 1));
216 }
217 }
218 return ret;
219}
220
228int
230
243void
244rte_thash_complete_matrix(uint64_t *matrixes, const uint8_t *rss_key,
245 int size);
246
248#define RTE_THASH_RETA_SZ_MIN 2U
250#define RTE_THASH_RETA_SZ_MAX 16U
251
256#define RTE_THASH_IGNORE_PERIOD_OVERFLOW 0x1
261#define RTE_THASH_MINIMAL_SEQ 0x2
262
264struct rte_thash_ctx;
266struct rte_thash_subtuple_helper;
267
290struct rte_thash_ctx *
291rte_thash_init_ctx(const char *name, uint32_t key_len, uint32_t reta_sz,
292 uint8_t *key, uint32_t flags);
293
304struct rte_thash_ctx *
305rte_thash_find_existing(const char *name);
306
313void
314rte_thash_free_ctx(struct rte_thash_ctx *ctx);
315
335int
336rte_thash_add_helper(struct rte_thash_ctx *ctx, const char *name, uint32_t len,
337 uint32_t offset);
338
349struct rte_thash_subtuple_helper *
350rte_thash_get_helper(struct rte_thash_ctx *ctx, const char *name);
351
367uint32_t
368rte_thash_get_complement(struct rte_thash_subtuple_helper *h,
369 uint32_t hash, uint32_t desired_hash);
370
381const uint8_t *
382rte_thash_get_key(struct rte_thash_ctx *ctx);
383
396const uint64_t *
397rte_thash_get_gfni_matrices(struct rte_thash_ctx *ctx);
398
415typedef int (*rte_thash_check_tuple_t)(void *userdata, uint8_t *tuple);
416
443int
444rte_thash_adjust_tuple(struct rte_thash_ctx *ctx,
445 struct rte_thash_subtuple_helper *h,
446 uint8_t *tuple, unsigned int tuple_len,
447 uint32_t desired_value, unsigned int attempts,
448 rte_thash_check_tuple_t fn, void *userdata);
449
450#ifdef __cplusplus
451}
452#endif
453
454#endif /* _RTE_THASH_H */
static uint32_t rte_bsf32(uint32_t v)
Definition rte_bitops.h:487
static uint32_t rte_be_to_cpu_32(rte_be32_t x)
static rte_be32_t rte_cpu_to_be_32(uint32_t x)
#define __rte_aligned(a)
Definition rte_common.h:70
static uint32_t rte_softrss_be(uint32_t *input_tuple, uint32_t input_len, const uint8_t *rss_key)
Definition rte_thash.h:206
uint32_t rte_thash_get_complement(struct rte_thash_subtuple_helper *h, uint32_t hash, uint32_t desired_hash)
static uint32_t rte_softrss(uint32_t *input_tuple, uint32_t input_len, const uint8_t *rss_key)
Definition rte_thash.h:176
void rte_thash_complete_matrix(uint64_t *matrixes, const uint8_t *rss_key, int size)
static void rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len)
Definition rte_thash.h:121
const uint8_t * rte_thash_get_key(struct rte_thash_ctx *ctx)
const uint64_t * rte_thash_get_gfni_matrices(struct rte_thash_ctx *ctx)
int rte_thash_add_helper(struct rte_thash_ctx *ctx, const char *name, uint32_t len, uint32_t offset)
int rte_thash_adjust_tuple(struct rte_thash_ctx *ctx, struct rte_thash_subtuple_helper *h, uint8_t *tuple, unsigned int tuple_len, uint32_t desired_value, unsigned int attempts, rte_thash_check_tuple_t fn, void *userdata)
struct rte_thash_ctx * rte_thash_init_ctx(const char *name, uint32_t key_len, uint32_t reta_sz, uint8_t *key, uint32_t flags)
struct rte_thash_ctx * rte_thash_find_existing(const char *name)
int rte_thash_gfni_supported(void)
struct rte_thash_subtuple_helper * rte_thash_get_helper(struct rte_thash_ctx *ctx, const char *name)
int(* rte_thash_check_tuple_t)(void *userdata, uint8_t *tuple)
Definition rte_thash.h:415
static void rte_thash_load_v6_addrs(const struct rte_ipv6_hdr *orig, union rte_thash_tuple *targ)
Definition rte_thash.h:138
void rte_thash_free_ctx(struct rte_thash_ctx *ctx)
uint8_t dst_addr[16]
Definition rte_ip.h:532
uint8_t src_addr[16]
Definition rte_ip.h:531