Message ID | 1430832011-17764-1-git-send-email-medvedkinv@gmail.com (mailing list archive) |
---|---|
State | Superseded, archived |
Headers |
Return-Path: <dev-bounces@dpdk.org> X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 1B300E72; Tue, 5 May 2015 15:22:46 +0200 (CEST) Received: from mailrelay1.rambler.ru (mailrelay1.rambler.ru [81.19.66.239]) by dpdk.org (Postfix) with ESMTP id 3035FDE4 for <dev@dpdk.org>; Tue, 5 May 2015 15:22:44 +0200 (CEST) Received: from hst119.rambler.ru (unknown [10.201.1.2]) by mailrelay1.rambler.ru (Postfix) with ESMTP id 3lh1v7509qzHps; Tue, 5 May 2015 16:22:43 +0300 (MSK) From: Vladimir Medvedkin <medvedkinv@gmail.com> To: dev@dpdk.org Date: Tue, 5 May 2015 09:20:11 -0400 Message-Id: <1430832011-17764-1-git-send-email-medvedkinv@gmail.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1428519973-10550-1-git-send-email-medvedkinv@gmail.com> References: <1428519973-10550-1-git-send-email-medvedkinv@gmail.com> X-Rcpt-To: <medvedkinv@gmail.com>, <dev@dpdk.org> Subject: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK <dev.dpdk.org> List-Unsubscribe: <http://dpdk.org/ml/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://dpdk.org/ml/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <http://dpdk.org/ml/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> |
Commit Message
Vladimir Medvedkin
May 5, 2015, 1:20 p.m. UTC
Software implementation of the Toeplitz hash function used by RSS.
Can be used either for packet distribution on single queue NIC
or for simulating of RSS computation on specific NIC (for example
after GRE header decapsulating).
v2 changes
- Add ipv6 support
- Various style fixes
Signed-off-by: Vladimir Medvedkin <medvedkinv@gmail.com>
---
lib/librte_hash/Makefile | 1 +
lib/librte_hash/rte_thash.h | 209 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 210 insertions(+)
create mode 100644 lib/librte_hash/rte_thash.h
Comments
Hi Vladimir, Why limit Toeplitz hash calculation to predefined tuples and length? Should it be more general, something like rte_softrss_be(void *input, uint32_t input_len, const uint8_t *rss_key) to enable hash calculation for an input of any size? It would be useful for distributing packets using some non-standard tuples, like hashing on QinQ or adding IP protocol to hash calculation to separate UDP and TCP flows or even some other fields from a packet, for example, tunnel ID from VXLAN headers. By the way, i40e already supports RSS for SCTP in addition to TCP and UDP and includes Verification Tag as well as SCTP source and destination ports for RSS hash. Regards, Andrey > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vladimir > Medvedkin > Sent: Tuesday, May 5, 2015 2:20 PM > To: dev@dpdk.org > Subject: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS > > Software implementation of the Toeplitz hash function used by RSS. > Can be used either for packet distribution on single queue NIC or for > simulating of RSS computation on specific NIC (for example after GRE header > decapsulating). > > v2 changes > - Add ipv6 support > - Various style fixes > > Signed-off-by: Vladimir Medvedkin <medvedkinv@gmail.com> > --- > lib/librte_hash/Makefile | 1 + > lib/librte_hash/rte_thash.h | 209 > ++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 210 insertions(+) > create mode 100644 lib/librte_hash/rte_thash.h > > diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index > 3696cb1..981230b 100644 > --- a/lib/librte_hash/Makefile > +++ b/lib/librte_hash/Makefile > @@ -49,6 +49,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_HASH) += rte_fbk_hash.c > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include := rte_hash.h SYMLINK- > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_hash_crc.h SYMLINK- > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_jhash.h > +SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_thash.h > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_fbk_hash.h > > # this lib needs eal > diff --git a/lib/librte_hash/rte_thash.h b/lib/librte_hash/rte_thash.h new file > mode 100644 index 0000000..42c7bf6 > --- /dev/null > +++ b/lib/librte_hash/rte_thash.h > @@ -0,0 +1,209 @@ > +/*- > + * 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. > + */ > + > +#ifndef _RTE_THASH_H > +#define _RTE_THASH_H > + > +/** > + * @file > + * > + * toeplitz hash functions. > + */ > + > +#ifdef __cplusplus > +extern "C" { > +#endif > + > +/** > + * Software implementation of the Toeplitz hash function used by RSS. > + * Can be used either for packet distribution on single queue NIC > + * or for simulating of RSS computation on specific NIC (for example > + * after GRE header decapsulating) > + */ > + > +#include <stdint.h> > +#include <rte_byteorder.h> > +#include <rte_vect.h> > + > +#ifdef __SSE3__ > +static const __m128i bswap_mask = {0x0405060700010203, > +0x0C0D0E0F08090A0B}; #endif > + > +enum rte_thash_len { > + RTE_THASH_V4_L3 = 2, /*calculate hash of ipv4 header > only*/ > + RTE_THASH_V4_L4 = 3, /*calculate hash of ipv4 + transport > headers*/ > + RTE_THASH_V6_L3 = 8, /*calculate hash of ipv6 header only > */ > + RTE_THASH_V6_L4 = 9, /*calculate hash of ipv6 + transport > headers */ > +}; > + > +/** > + * IPv4 tuple > + * addreses and ports have to be CPU byte order */ struct > +rte_ipv4_tuple { > + uint32_t src_addr; > + uint32_t dst_addr; > + uint16_t dport; > + uint16_t sport; > +}; > + > +/** > + * IPv6 tuple > + * Addresses have to be filled by rte_thash_load_v6_addr() > + * ports have to be CPU byte order > + */ > +struct rte_ipv6_tuple { > + uint8_t src_addr[16]; > + uint8_t dst_addr[16]; > + uint16_t dport; > + uint16_t sport; > +}; > + > +union rte_thash_tuple { > + struct rte_ipv4_tuple v4; > + struct rte_ipv6_tuple v6; > +} __attribute__((aligned(16))); > + > +/** > + * Prepare special converted key to use with rte_softrss_be() > + * @param orig > + * pointer to original RSS key > + * @param targ > + * pointer to target RSS key > + * @param len > + * RSS key length > + */ > +static inline void > +rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len) { > + int i; > + > + for (i = 0; i < (len >> 2); i++) { > + targ[i] = rte_be_to_cpu_32(orig[i]); > + } > +} > + > +/** > + * Prepare and load IPv6 address > + * @param orig > + * Pointer to ipv6 address inside ipv6_hdr > + * @param targ > + * Pointer to ipv6 address inside rte_ipv6_tuple > + */ > +static inline void > +rte_thash_load_v6_addr(const uint8_t *orig, uint8_t *targ) { #ifdef > +__SSE3__ > + __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig); > + *(__m128i *)targ = _mm_shuffle_epi8(ipv6, bswap_mask); #else > + int i; > + > + for (i = 0; i < 4; i++) { > + *((uint32_t *)targ + i) = > + rte_be_to_cpu_32(*((const uint32_t *)orig + i)); > + } > +#endif > +} > + > +/** > + * Generic implementation. Can be used with original rss_key > + * @param input_tuple > + * Pointer to rte_thash_tuple union > + * @param input_len > + * Length of input_tuple in 4-bytes chunks > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst > address > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > ports > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst > address > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > ports > + * @param rss_key > + * Pointer to RSS hash key. > + * @return > + * Calculated hash value. > + */ > +static inline uint32_t > +rte_softrss(union rte_thash_tuple *input_tuple, enum rte_thash_len > input_len, > + const uint8_t *rss_key) > +{ > + uint32_t i, j, ret = 0; > + > + for (j = 0; j < input_len; j++) { > + for (i = 0; i < 32; i++) { > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { > + ret ^= rte_cpu_to_be_32(((const uint32_t > *)rss_key)[j]) << i | > + > (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t > *)rss_key)[j + 1])) >> (32 - i)); > + } > + } > + } > + return ret; > +} > + > +/** > + * Optimized implementation. > + * If you want the calculated hash value matches NIC RSS value > + * you have to use special converted key. > + * @param input_tuple > + * Pointer to rte_thash_tuple union > + * @param input_len > + * Length of input_tuple in 4-bytes chunks > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst > address > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > ports > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst > address > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > ports > + * @param *rss_key > + * Pointer to RSS hash key. > + * @return > + * Calculated hash value. > + */ > +static inline uint32_t > +rte_softrss_be(union rte_thash_tuple *input_tuple, enum rte_thash_len > input_len, > + const uint8_t *rss_key) > +{ > + uint32_t i, j, ret = 0; > + > + for (j = 0; j < input_len; j++) { > + for (i = 0; i < 32; i++) { > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { > + ret ^= ((const uint32_t *)rss_key)[j] << i | > + (uint32_t)((uint64_t)(((const uint32_t > *)rss_key)[j + 1]) >> (32 - i)); > + } > + } > + } > + return ret; > +} > + > +#ifdef __cplusplus > +} > +#endif > + > +#endif /* _RTE_THASH_H */ > -- > 1.8.3.2
Hi Andrey, The main goal of this new functions is to calculate the hash which is equal to the hash of the NIC. According to XL710 datasheet table 7-5 for sctp input set consists of IP4-S, IP4-D, SCTP-Verification-Tag. I don't see any NIC that uses QinQ or single vlan tag, ip proto number, tunnel id, vxlan, etc for calculating RSS hash. If it appear we can always update union rte_thash_tuple. I think it should be like: struct rte_ports { uint16_t dport; uint16_t sport; }; union rte_thash_l4 { struct rte_ports ports; uint32_t sctp_tag; }; struct rte_ipv4_tuple { uint32_t src_addr; uint32_t dst_addr; union rte_thash_l4 l4; }; If it is necessary to distribute packets according to non standart tuples I think it's more appropriate to use crc32 or jhash because of speed. rte_softrss_be consumes 400-500 clocks for each 4-byte input at E3 1230v1@3.2GHz. This means for ipv4+tcp it consumes ~1500 clocks. If you or someone still think you need general toeplitz hash I'll add it. Regards, Vladimir 2015-05-05 19:03 GMT+03:00 Chilikin, Andrey <andrey.chilikin@intel.com>: > Hi Vladimir, > > Why limit Toeplitz hash calculation to predefined tuples and length? > Should it be more general, something like > rte_softrss_be(void *input, uint32_t input_len, const uint8_t *rss_key) to > enable hash calculation for an input of any size? It would be useful for > distributing packets using some non-standard tuples, like hashing on QinQ > or adding IP protocol to hash calculation to separate UDP and TCP flows or > even some other fields from a packet, for example, tunnel ID from VXLAN > headers. By the way, i40e already supports RSS for SCTP in addition to TCP > and UDP and includes Verification Tag as well as SCTP source and > destination ports for RSS hash. > > Regards, > Andrey > > > -----Original Message----- > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vladimir > > Medvedkin > > Sent: Tuesday, May 5, 2015 2:20 PM > > To: dev@dpdk.org > > Subject: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS > > > > Software implementation of the Toeplitz hash function used by RSS. > > Can be used either for packet distribution on single queue NIC or for > > simulating of RSS computation on specific NIC (for example after GRE > header > > decapsulating). > > > > v2 changes > > - Add ipv6 support > > - Various style fixes > > > > Signed-off-by: Vladimir Medvedkin <medvedkinv@gmail.com> > > --- > > lib/librte_hash/Makefile | 1 + > > lib/librte_hash/rte_thash.h | 209 > > ++++++++++++++++++++++++++++++++++++++++++++ > > 2 files changed, 210 insertions(+) > > create mode 100644 lib/librte_hash/rte_thash.h > > > > diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index > > 3696cb1..981230b 100644 > > --- a/lib/librte_hash/Makefile > > +++ b/lib/librte_hash/Makefile > > @@ -49,6 +49,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_HASH) += rte_fbk_hash.c > > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include := rte_hash.h SYMLINK- > > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_hash_crc.h SYMLINK- > > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_jhash.h > > +SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_thash.h > > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_fbk_hash.h > > > > # this lib needs eal > > diff --git a/lib/librte_hash/rte_thash.h b/lib/librte_hash/rte_thash.h > new file > > mode 100644 index 0000000..42c7bf6 > > --- /dev/null > > +++ b/lib/librte_hash/rte_thash.h > > @@ -0,0 +1,209 @@ > > +/*- > > + * 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. > > + */ > > + > > +#ifndef _RTE_THASH_H > > +#define _RTE_THASH_H > > + > > +/** > > + * @file > > + * > > + * toeplitz hash functions. > > + */ > > + > > +#ifdef __cplusplus > > +extern "C" { > > +#endif > > + > > +/** > > + * Software implementation of the Toeplitz hash function used by RSS. > > + * Can be used either for packet distribution on single queue NIC > > + * or for simulating of RSS computation on specific NIC (for example > > + * after GRE header decapsulating) > > + */ > > + > > +#include <stdint.h> > > +#include <rte_byteorder.h> > > +#include <rte_vect.h> > > + > > +#ifdef __SSE3__ > > +static const __m128i bswap_mask = {0x0405060700010203, > > +0x0C0D0E0F08090A0B}; #endif > > + > > +enum rte_thash_len { > > + RTE_THASH_V4_L3 = 2, /*calculate hash of ipv4 header > > only*/ > > + RTE_THASH_V4_L4 = 3, /*calculate hash of ipv4 + transport > > headers*/ > > + RTE_THASH_V6_L3 = 8, /*calculate hash of ipv6 header only > > */ > > + RTE_THASH_V6_L4 = 9, /*calculate hash of ipv6 + transport > > headers */ > > +}; > > + > > +/** > > + * IPv4 tuple > > + * addreses and ports have to be CPU byte order */ struct > > +rte_ipv4_tuple { > > + uint32_t src_addr; > > + uint32_t dst_addr; > > + uint16_t dport; > > + uint16_t sport; > > +}; > > + > > +/** > > + * IPv6 tuple > > + * Addresses have to be filled by rte_thash_load_v6_addr() > > + * ports have to be CPU byte order > > + */ > > +struct rte_ipv6_tuple { > > + uint8_t src_addr[16]; > > + uint8_t dst_addr[16]; > > + uint16_t dport; > > + uint16_t sport; > > +}; > > + > > +union rte_thash_tuple { > > + struct rte_ipv4_tuple v4; > > + struct rte_ipv6_tuple v6; > > +} __attribute__((aligned(16))); > > + > > +/** > > + * Prepare special converted key to use with rte_softrss_be() > > + * @param orig > > + * pointer to original RSS key > > + * @param targ > > + * pointer to target RSS key > > + * @param len > > + * RSS key length > > + */ > > +static inline void > > +rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len) { > > + int i; > > + > > + for (i = 0; i < (len >> 2); i++) { > > + targ[i] = rte_be_to_cpu_32(orig[i]); > > + } > > +} > > + > > +/** > > + * Prepare and load IPv6 address > > + * @param orig > > + * Pointer to ipv6 address inside ipv6_hdr > > + * @param targ > > + * Pointer to ipv6 address inside rte_ipv6_tuple > > + */ > > +static inline void > > +rte_thash_load_v6_addr(const uint8_t *orig, uint8_t *targ) { #ifdef > > +__SSE3__ > > + __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig); > > + *(__m128i *)targ = _mm_shuffle_epi8(ipv6, bswap_mask); #else > > + int i; > > + > > + for (i = 0; i < 4; i++) { > > + *((uint32_t *)targ + i) = > > + rte_be_to_cpu_32(*((const uint32_t *)orig + i)); > > + } > > +#endif > > +} > > + > > +/** > > + * Generic implementation. Can be used with original rss_key > > + * @param input_tuple > > + * Pointer to rte_thash_tuple union > > + * @param input_len > > + * Length of input_tuple in 4-bytes chunks > > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and > IPv4 dst > > address > > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > > ports > > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and > IPv4 dst > > address > > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > > ports > > + * @param rss_key > > + * Pointer to RSS hash key. > > + * @return > > + * Calculated hash value. > > + */ > > +static inline uint32_t > > +rte_softrss(union rte_thash_tuple *input_tuple, enum rte_thash_len > > input_len, > > + const uint8_t *rss_key) > > +{ > > + uint32_t i, j, ret = 0; > > + > > + for (j = 0; j < input_len; j++) { > > + for (i = 0; i < 32; i++) { > > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - > i))) { > > + ret ^= rte_cpu_to_be_32(((const uint32_t > > *)rss_key)[j]) << i | > > + > > (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t > > *)rss_key)[j + 1])) >> (32 - i)); > > + } > > + } > > + } > > + return ret; > > +} > > + > > +/** > > + * Optimized implementation. > > + * If you want the calculated hash value matches NIC RSS value > > + * you have to use special converted key. > > + * @param input_tuple > > + * Pointer to rte_thash_tuple union > > + * @param input_len > > + * Length of input_tuple in 4-bytes chunks > > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and > IPv4 dst > > address > > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > > ports > > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and > IPv4 dst > > address > > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > > ports > > + * @param *rss_key > > + * Pointer to RSS hash key. > > + * @return > > + * Calculated hash value. > > + */ > > +static inline uint32_t > > +rte_softrss_be(union rte_thash_tuple *input_tuple, enum rte_thash_len > > input_len, > > + const uint8_t *rss_key) > > +{ > > + uint32_t i, j, ret = 0; > > + > > + for (j = 0; j < input_len; j++) { > > + for (i = 0; i < 32; i++) { > > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - > i))) { > > + ret ^= ((const uint32_t *)rss_key)[j] << i > | > > + (uint32_t)((uint64_t)(((const > uint32_t > > *)rss_key)[j + 1]) >> (32 - i)); > > + } > > + } > > + } > > + return ret; > > +} > > + > > +#ifdef __cplusplus > > +} > > +#endif > > + > > +#endif /* _RTE_THASH_H */ > > -- > > 1.8.3.2 > >
Hi Vladimir, Yes, at the moment NICs support limited input sets for hash calculation, but why limit SW for the same sets if it can be done in more general way and be easily scalable for HW updates? Using limited input set for RSS is not a feature of Toeplitz hash, but limitation of HW. I believe that general Toeplitz function will be more appropriate – it will cover input sets currently supported by HW and also will be easily scalable for future HW. Also, talking about different NICs – Niantic and Fortville, for example, have hash keys of different length, so rte_softrss() function should take into account hash key’s length as well. Regards, Andrey From: Vladimir Medvedkin [mailto:medvedkinv@gmail.com] Sent: Thursday, May 7, 2015 11:28 AM To: Chilikin, Andrey Cc: dev@dpdk.org Subject: Re: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS Hi Andrey, The main goal of this new functions is to calculate the hash which is equal to the hash of the NIC. According to XL710 datasheet table 7-5 for sctp input set consists of IP4-S, IP4-D, SCTP-Verification-Tag. I don't see any NIC that uses QinQ or single vlan tag, ip proto number, tunnel id, vxlan, etc for calculating RSS hash. If it appear we can always update union rte_thash_tuple. I think it should be like: struct rte_ports { uint16_t dport; uint16_t sport; }; union rte_thash_l4 { struct rte_ports ports; uint32_t sctp_tag; }; struct rte_ipv4_tuple { uint32_t src_addr; uint32_t dst_addr; union rte_thash_l4 l4; }; If it is necessary to distribute packets according to non standart tuples I think it's more appropriate to use crc32 or jhash because of speed. rte_softrss_be consumes 400-500 clocks for each 4-byte input at E3 1230v1@3.2GHz<mailto:1230v1@3.2GHz>. This means for ipv4+tcp it consumes ~1500 clocks. If you or someone still think you need general toeplitz hash I'll add it. Regards, Vladimir 2015-05-05 19:03 GMT+03:00 Chilikin, Andrey <andrey.chilikin@intel.com<mailto:andrey.chilikin@intel.com>>: Hi Vladimir, Why limit Toeplitz hash calculation to predefined tuples and length? Should it be more general, something like rte_softrss_be(void *input, uint32_t input_len, const uint8_t *rss_key) to enable hash calculation for an input of any size? It would be useful for distributing packets using some non-standard tuples, like hashing on QinQ or adding IP protocol to hash calculation to separate UDP and TCP flows or even some other fields from a packet, for example, tunnel ID from VXLAN headers. By the way, i40e already supports RSS for SCTP in addition to TCP and UDP and includes Verification Tag as well as SCTP source and destination ports for RSS hash. Regards, Andrey > -----Original Message----- > From: dev [mailto:dev-bounces@dpdk.org<mailto:dev-bounces@dpdk.org>] On Behalf Of Vladimir > Medvedkin > Sent: Tuesday, May 5, 2015 2:20 PM > To: dev@dpdk.org<mailto:dev@dpdk.org> > Subject: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS > > Software implementation of the Toeplitz hash function used by RSS. > Can be used either for packet distribution on single queue NIC or for > simulating of RSS computation on specific NIC (for example after GRE header > decapsulating). > > v2 changes > - Add ipv6 support > - Various style fixes > > Signed-off-by: Vladimir Medvedkin <medvedkinv@gmail.com<mailto:medvedkinv@gmail.com>> > --- > lib/librte_hash/Makefile | 1 + > lib/librte_hash/rte_thash.h | 209 > ++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 210 insertions(+) > create mode 100644 lib/librte_hash/rte_thash.h > > diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index > 3696cb1..981230b 100644 > --- a/lib/librte_hash/Makefile > +++ b/lib/librte_hash/Makefile > @@ -49,6 +49,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_HASH) += rte_fbk_hash.c > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include := rte_hash.h SYMLINK- > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_hash_crc.h SYMLINK- > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_jhash.h > +SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_thash.h > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_fbk_hash.h > > # this lib needs eal > diff --git a/lib/librte_hash/rte_thash.h b/lib/librte_hash/rte_thash.h new file > mode 100644 index 0000000..42c7bf6 > --- /dev/null > +++ b/lib/librte_hash/rte_thash.h > @@ -0,0 +1,209 @@ > +/*- > + * 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. > + */ > + > +#ifndef _RTE_THASH_H > +#define _RTE_THASH_H > + > +/** > + * @file > + * > + * toeplitz hash functions. > + */ > + > +#ifdef __cplusplus > +extern "C" { > +#endif > + > +/** > + * Software implementation of the Toeplitz hash function used by RSS. > + * Can be used either for packet distribution on single queue NIC > + * or for simulating of RSS computation on specific NIC (for example > + * after GRE header decapsulating) > + */ > + > +#include <stdint.h> > +#include <rte_byteorder.h> > +#include <rte_vect.h> > + > +#ifdef __SSE3__ > +static const __m128i bswap_mask = {0x0405060700010203, > +0x0C0D0E0F08090A0B}; #endif > + > +enum rte_thash_len { > + RTE_THASH_V4_L3 = 2, /*calculate hash of ipv4 header > only*/ > + RTE_THASH_V4_L4 = 3, /*calculate hash of ipv4 + transport > headers*/ > + RTE_THASH_V6_L3 = 8, /*calculate hash of ipv6 header only > */ > + RTE_THASH_V6_L4 = 9, /*calculate hash of ipv6 + transport > headers */ > +}; > + > +/** > + * IPv4 tuple > + * addreses and ports have to be CPU byte order */ struct > +rte_ipv4_tuple { > + uint32_t src_addr; > + uint32_t dst_addr; > + uint16_t dport; > + uint16_t sport; > +}; > + > +/** > + * IPv6 tuple > + * Addresses have to be filled by rte_thash_load_v6_addr() > + * ports have to be CPU byte order > + */ > +struct rte_ipv6_tuple { > + uint8_t src_addr[16]; > + uint8_t dst_addr[16]; > + uint16_t dport; > + uint16_t sport; > +}; > + > +union rte_thash_tuple { > + struct rte_ipv4_tuple v4; > + struct rte_ipv6_tuple v6; > +} __attribute__((aligned(16))); > + > +/** > + * Prepare special converted key to use with rte_softrss_be() > + * @param orig > + * pointer to original RSS key > + * @param targ > + * pointer to target RSS key > + * @param len > + * RSS key length > + */ > +static inline void > +rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len) { > + int i; > + > + for (i = 0; i < (len >> 2); i++) { > + targ[i] = rte_be_to_cpu_32(orig[i]); > + } > +} > + > +/** > + * Prepare and load IPv6 address > + * @param orig > + * Pointer to ipv6 address inside ipv6_hdr > + * @param targ > + * Pointer to ipv6 address inside rte_ipv6_tuple > + */ > +static inline void > +rte_thash_load_v6_addr(const uint8_t *orig, uint8_t *targ) { #ifdef > +__SSE3__ > + __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig); > + *(__m128i *)targ = _mm_shuffle_epi8(ipv6, bswap_mask); #else > + int i; > + > + for (i = 0; i < 4; i++) { > + *((uint32_t *)targ + i) = > + rte_be_to_cpu_32(*((const uint32_t *)orig + i)); > + } > +#endif > +} > + > +/** > + * Generic implementation. Can be used with original rss_key > + * @param input_tuple > + * Pointer to rte_thash_tuple union > + * @param input_len > + * Length of input_tuple in 4-bytes chunks > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst > address > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > ports > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst > address > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > ports > + * @param rss_key > + * Pointer to RSS hash key. > + * @return > + * Calculated hash value. > + */ > +static inline uint32_t > +rte_softrss(union rte_thash_tuple *input_tuple, enum rte_thash_len > input_len, > + const uint8_t *rss_key) > +{ > + uint32_t i, j, ret = 0; > + > + for (j = 0; j < input_len; j++) { > + for (i = 0; i < 32; i++) { > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { > + ret ^= rte_cpu_to_be_32(((const uint32_t > *)rss_key)[j]) << i | > + > (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t > *)rss_key)[j + 1])) >> (32 - i)); > + } > + } > + } > + return ret; > +} > + > +/** > + * Optimized implementation. > + * If you want the calculated hash value matches NIC RSS value > + * you have to use special converted key. > + * @param input_tuple > + * Pointer to rte_thash_tuple union > + * @param input_len > + * Length of input_tuple in 4-bytes chunks > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst > address > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > ports > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst > address > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > ports > + * @param *rss_key > + * Pointer to RSS hash key. > + * @return > + * Calculated hash value. > + */ > +static inline uint32_t > +rte_softrss_be(union rte_thash_tuple *input_tuple, enum rte_thash_len > input_len, > + const uint8_t *rss_key) > +{ > + uint32_t i, j, ret = 0; > + > + for (j = 0; j < input_len; j++) { > + for (i = 0; i < 32; i++) { > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { > + ret ^= ((const uint32_t *)rss_key)[j] << i | > + (uint32_t)((uint64_t)(((const uint32_t > *)rss_key)[j + 1]) >> (32 - i)); > + } > + } > + } > + return ret; > +} > + > +#ifdef __cplusplus > +} > +#endif > + > +#endif /* _RTE_THASH_H */ > -- > 1.8.3.2
Hi Andrey, OK, so be it. Thus in case you want to distribute (or just calculate hash based on non standart tuple) - use your own tuple and own hash key (length of tuple and key - responsible of the programmer). In case you want to emulate NIC RSS - use union rte_thash_tuple (still needs to be updated with new NICs input tuples) and NIC RSS hash key. P.S Thanks for reviews. Regards, Vladimir 2015-05-07 14:38 GMT+03:00 Chilikin, Andrey <andrey.chilikin@intel.com>: > Hi Vladimir, > > > > Yes, at the moment NICs support limited input sets for hash calculation, > but why limit SW for the same sets if it can be done in more general way > and be easily scalable for HW updates? Using limited input set for RSS is > not a feature of Toeplitz hash, but limitation of HW. I believe that > general Toeplitz function will be more appropriate – it will cover input > sets currently supported by HW and also will be easily scalable for future > HW. Also, talking about different NICs – Niantic and Fortville, for > example, have hash keys of different length, so rte_softrss() function > should take into account hash key’s length as well. > > Regards, > > Andrey > > > > > > *From:* Vladimir Medvedkin [mailto:medvedkinv@gmail.com] > *Sent:* Thursday, May 7, 2015 11:28 AM > *To:* Chilikin, Andrey > *Cc:* dev@dpdk.org > *Subject:* Re: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by > RSS > > > > Hi Andrey, > > The main goal of this new functions is to calculate the hash which is > equal to the hash of the NIC. > According to XL710 datasheet table 7-5 for sctp input set consists of > IP4-S, IP4-D, SCTP-Verification-Tag. I don't see any NIC that uses QinQ or > single vlan tag, ip proto number, tunnel id, vxlan, etc for calculating RSS > hash. If it appear we can always update union rte_thash_tuple. > I think it should be like: > > struct rte_ports { > uint16_t dport; > uint16_t sport; > }; > > union rte_thash_l4 { > struct rte_ports ports; > uint32_t sctp_tag; > }; > struct rte_ipv4_tuple { > uint32_t src_addr; > uint32_t dst_addr; > union rte_thash_l4 l4; > }; > > If it is necessary to distribute packets according to non standart tuples > I think it's more appropriate to use crc32 or jhash because of speed. > rte_softrss_be consumes 400-500 clocks for each 4-byte input at E3 > 1230v1@3.2GHz. This means for ipv4+tcp it consumes ~1500 clocks. > > If you or someone still think you need general toeplitz hash I'll add it. > > Regards, > > Vladimir > > > > > > 2015-05-05 19:03 GMT+03:00 Chilikin, Andrey <andrey.chilikin@intel.com>: > > Hi Vladimir, > > Why limit Toeplitz hash calculation to predefined tuples and length? > Should it be more general, something like > rte_softrss_be(void *input, uint32_t input_len, const uint8_t *rss_key) to > enable hash calculation for an input of any size? It would be useful for > distributing packets using some non-standard tuples, like hashing on QinQ > or adding IP protocol to hash calculation to separate UDP and TCP flows or > even some other fields from a packet, for example, tunnel ID from VXLAN > headers. By the way, i40e already supports RSS for SCTP in addition to TCP > and UDP and includes Verification Tag as well as SCTP source and > destination ports for RSS hash. > > Regards, > Andrey > > > > -----Original Message----- > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Vladimir > > Medvedkin > > Sent: Tuesday, May 5, 2015 2:20 PM > > To: dev@dpdk.org > > Subject: [dpdk-dev] [PATCH v2] Add toeplitz hash algorithm used by RSS > > > > Software implementation of the Toeplitz hash function used by RSS. > > Can be used either for packet distribution on single queue NIC or for > > simulating of RSS computation on specific NIC (for example after GRE > header > > decapsulating). > > > > v2 changes > > - Add ipv6 support > > - Various style fixes > > > > Signed-off-by: Vladimir Medvedkin <medvedkinv@gmail.com> > > --- > > lib/librte_hash/Makefile | 1 + > > lib/librte_hash/rte_thash.h | 209 > > ++++++++++++++++++++++++++++++++++++++++++++ > > 2 files changed, 210 insertions(+) > > create mode 100644 lib/librte_hash/rte_thash.h > > > > diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index > > 3696cb1..981230b 100644 > > --- a/lib/librte_hash/Makefile > > +++ b/lib/librte_hash/Makefile > > @@ -49,6 +49,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_HASH) += rte_fbk_hash.c > > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include := rte_hash.h SYMLINK- > > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_hash_crc.h SYMLINK- > > $(CONFIG_RTE_LIBRTE_HASH)-include += rte_jhash.h > > +SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_thash.h > > SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_fbk_hash.h > > > > # this lib needs eal > > diff --git a/lib/librte_hash/rte_thash.h b/lib/librte_hash/rte_thash.h > new file > > mode 100644 index 0000000..42c7bf6 > > --- /dev/null > > +++ b/lib/librte_hash/rte_thash.h > > @@ -0,0 +1,209 @@ > > +/*- > > + * 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. > > + */ > > + > > +#ifndef _RTE_THASH_H > > +#define _RTE_THASH_H > > + > > +/** > > + * @file > > + * > > + * toeplitz hash functions. > > + */ > > + > > +#ifdef __cplusplus > > +extern "C" { > > +#endif > > + > > +/** > > + * Software implementation of the Toeplitz hash function used by RSS. > > + * Can be used either for packet distribution on single queue NIC > > + * or for simulating of RSS computation on specific NIC (for example > > + * after GRE header decapsulating) > > + */ > > + > > +#include <stdint.h> > > +#include <rte_byteorder.h> > > +#include <rte_vect.h> > > + > > +#ifdef __SSE3__ > > +static const __m128i bswap_mask = {0x0405060700010203, > > > +0x0C0D0E0F08090A0B}; #endif > > + > > +enum rte_thash_len { > > + RTE_THASH_V4_L3 = 2, /*calculate hash of ipv4 header > > only*/ > > + RTE_THASH_V4_L4 = 3, /*calculate hash of ipv4 + transport > > headers*/ > > + RTE_THASH_V6_L3 = 8, /*calculate hash of ipv6 header only > > */ > > + RTE_THASH_V6_L4 = 9, /*calculate hash of ipv6 + transport > > headers */ > > +}; > > + > > +/** > > + * IPv4 tuple > > + * addreses and ports have to be CPU byte order */ struct > > +rte_ipv4_tuple { > > > + uint32_t src_addr; > > + uint32_t dst_addr; > > + uint16_t dport; > > + uint16_t sport; > > +}; > > + > > +/** > > + * IPv6 tuple > > + * Addresses have to be filled by rte_thash_load_v6_addr() > > + * ports have to be CPU byte order > > + */ > > +struct rte_ipv6_tuple { > > + uint8_t src_addr[16]; > > + uint8_t dst_addr[16]; > > + uint16_t dport; > > + uint16_t sport; > > +}; > > + > > +union rte_thash_tuple { > > + struct rte_ipv4_tuple v4; > > + struct rte_ipv6_tuple v6; > > +} __attribute__((aligned(16))); > > + > > +/** > > + * Prepare special converted key to use with rte_softrss_be() > > + * @param orig > > + * pointer to original RSS key > > + * @param targ > > + * pointer to target RSS key > > + * @param len > > + * RSS key length > > + */ > > +static inline void > > +rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len) { > > > + int i; > > + > > + for (i = 0; i < (len >> 2); i++) { > > + targ[i] = rte_be_to_cpu_32(orig[i]); > > + } > > +} > > + > > +/** > > + * Prepare and load IPv6 address > > + * @param orig > > + * Pointer to ipv6 address inside ipv6_hdr > > + * @param targ > > + * Pointer to ipv6 address inside rte_ipv6_tuple > > + */ > > +static inline void > > +rte_thash_load_v6_addr(const uint8_t *orig, uint8_t *targ) { #ifdef > > +__SSE3__ > > + __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig); > > + *(__m128i *)targ = _mm_shuffle_epi8(ipv6, bswap_mask); #else > > > + int i; > > + > > + for (i = 0; i < 4; i++) { > > + *((uint32_t *)targ + i) = > > + rte_be_to_cpu_32(*((const uint32_t *)orig + i)); > > + } > > +#endif > > +} > > + > > +/** > > + * Generic implementation. Can be used with original rss_key > > + * @param input_tuple > > + * Pointer to rte_thash_tuple union > > + * @param input_len > > + * Length of input_tuple in 4-bytes chunks > > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and > IPv4 dst > > address > > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > > ports > > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and > IPv4 dst > > address > > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > > ports > > + * @param rss_key > > + * Pointer to RSS hash key. > > + * @return > > + * Calculated hash value. > > + */ > > +static inline uint32_t > > +rte_softrss(union rte_thash_tuple *input_tuple, enum rte_thash_len > > input_len, > > + const uint8_t *rss_key) > > +{ > > + uint32_t i, j, ret = 0; > > + > > + for (j = 0; j < input_len; j++) { > > + for (i = 0; i < 32; i++) { > > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - > i))) { > > + ret ^= rte_cpu_to_be_32(((const uint32_t > > *)rss_key)[j]) << i | > > + > > (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t > > *)rss_key)[j + 1])) >> (32 - i)); > > + } > > + } > > + } > > + return ret; > > +} > > + > > +/** > > + * Optimized implementation. > > + * If you want the calculated hash value matches NIC RSS value > > + * you have to use special converted key. > > + * @param input_tuple > > + * Pointer to rte_thash_tuple union > > + * @param input_len > > + * Length of input_tuple in 4-bytes chunks > > + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and > IPv4 dst > > address > > + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP > > ports > > + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and > IPv4 dst > > address > > + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP > > ports > > + * @param *rss_key > > + * Pointer to RSS hash key. > > + * @return > > + * Calculated hash value. > > + */ > > +static inline uint32_t > > +rte_softrss_be(union rte_thash_tuple *input_tuple, enum rte_thash_len > > input_len, > > + const uint8_t *rss_key) > > +{ > > + uint32_t i, j, ret = 0; > > + > > + for (j = 0; j < input_len; j++) { > > + for (i = 0; i < 32; i++) { > > + if (((uint32_t *)input_tuple)[j] & (1 << (31 - > i))) { > > + ret ^= ((const uint32_t *)rss_key)[j] << i > | > > + (uint32_t)((uint64_t)(((const > uint32_t > > *)rss_key)[j + 1]) >> (32 - i)); > > + } > > + } > > + } > > + return ret; > > +} > > + > > +#ifdef __cplusplus > > +} > > +#endif > > + > > +#endif /* _RTE_THASH_H */ > > -- > > 1.8.3.2 > > >
diff --git a/lib/librte_hash/Makefile b/lib/librte_hash/Makefile index 3696cb1..981230b 100644 --- a/lib/librte_hash/Makefile +++ b/lib/librte_hash/Makefile @@ -49,6 +49,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_HASH) += rte_fbk_hash.c SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include := rte_hash.h SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_hash_crc.h SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_jhash.h +SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_thash.h SYMLINK-$(CONFIG_RTE_LIBRTE_HASH)-include += rte_fbk_hash.h # this lib needs eal diff --git a/lib/librte_hash/rte_thash.h b/lib/librte_hash/rte_thash.h new file mode 100644 index 0000000..42c7bf6 --- /dev/null +++ b/lib/librte_hash/rte_thash.h @@ -0,0 +1,209 @@ +/*- + * 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. + */ + +#ifndef _RTE_THASH_H +#define _RTE_THASH_H + +/** + * @file + * + * toeplitz hash functions. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Software implementation of the Toeplitz hash function used by RSS. + * Can be used either for packet distribution on single queue NIC + * or for simulating of RSS computation on specific NIC (for example + * after GRE header decapsulating) + */ + +#include <stdint.h> +#include <rte_byteorder.h> +#include <rte_vect.h> + +#ifdef __SSE3__ +static const __m128i bswap_mask = {0x0405060700010203, 0x0C0D0E0F08090A0B}; +#endif + +enum rte_thash_len { + RTE_THASH_V4_L3 = 2, /*calculate hash of ipv4 header only*/ + RTE_THASH_V4_L4 = 3, /*calculate hash of ipv4 + transport headers*/ + RTE_THASH_V6_L3 = 8, /*calculate hash of ipv6 header only */ + RTE_THASH_V6_L4 = 9, /*calculate hash of ipv6 + transport headers */ +}; + +/** + * IPv4 tuple + * addreses and ports have to be CPU byte order + */ +struct rte_ipv4_tuple { + uint32_t src_addr; + uint32_t dst_addr; + uint16_t dport; + uint16_t sport; +}; + +/** + * IPv6 tuple + * Addresses have to be filled by rte_thash_load_v6_addr() + * ports have to be CPU byte order + */ +struct rte_ipv6_tuple { + uint8_t src_addr[16]; + uint8_t dst_addr[16]; + uint16_t dport; + uint16_t sport; +}; + +union rte_thash_tuple { + struct rte_ipv4_tuple v4; + struct rte_ipv6_tuple v6; +} __attribute__((aligned(16))); + +/** + * Prepare special converted key to use with rte_softrss_be() + * @param orig + * pointer to original RSS key + * @param targ + * pointer to target RSS key + * @param len + * RSS key length + */ +static inline void +rte_convert_rss_key(const uint32_t *orig, uint32_t *targ, int len) +{ + int i; + + for (i = 0; i < (len >> 2); i++) { + targ[i] = rte_be_to_cpu_32(orig[i]); + } +} + +/** + * Prepare and load IPv6 address + * @param orig + * Pointer to ipv6 address inside ipv6_hdr + * @param targ + * Pointer to ipv6 address inside rte_ipv6_tuple + */ +static inline void +rte_thash_load_v6_addr(const uint8_t *orig, uint8_t *targ) +{ +#ifdef __SSE3__ + __m128i ipv6 = _mm_loadu_si128((const __m128i *)orig); + *(__m128i *)targ = _mm_shuffle_epi8(ipv6, bswap_mask); +#else + int i; + + for (i = 0; i < 4; i++) { + *((uint32_t *)targ + i) = + rte_be_to_cpu_32(*((const uint32_t *)orig + i)); + } +#endif +} + +/** + * Generic implementation. Can be used with original rss_key + * @param input_tuple + * Pointer to rte_thash_tuple union + * @param input_len + * Length of input_tuple in 4-bytes chunks + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst address + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP ports + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst address + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP ports + * @param rss_key + * Pointer to RSS hash key. + * @return + * Calculated hash value. + */ +static inline uint32_t +rte_softrss(union rte_thash_tuple *input_tuple, enum rte_thash_len input_len, + const uint8_t *rss_key) +{ + uint32_t i, j, ret = 0; + + for (j = 0; j < input_len; j++) { + for (i = 0; i < 32; i++) { + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { + ret ^= rte_cpu_to_be_32(((const uint32_t *)rss_key)[j]) << i | + (uint32_t)((uint64_t)(rte_cpu_to_be_32(((const uint32_t *)rss_key)[j + 1])) >> (32 - i)); + } + } + } + return ret; +} + +/** + * Optimized implementation. + * If you want the calculated hash value matches NIC RSS value + * you have to use special converted key. + * @param input_tuple + * Pointer to rte_thash_tuple union + * @param input_len + * Length of input_tuple in 4-bytes chunks + * RTE_THASH_V4_L3: calculate hash of IPv4 src address and IPv4 dst address + * RTE_THASH_V4_L4 calculate hash of IPv4 adresses and TCP|UDP ports + * RTE_THASH_V6_L3: calculate hash of IPv6 src address and IPv4 dst address + * RTE_THASH_V6_L4 calculate hash of IPv6 adresses and TCP|UDP ports + * @param *rss_key + * Pointer to RSS hash key. + * @return + * Calculated hash value. + */ +static inline uint32_t +rte_softrss_be(union rte_thash_tuple *input_tuple, enum rte_thash_len input_len, + const uint8_t *rss_key) +{ + uint32_t i, j, ret = 0; + + for (j = 0; j < input_len; j++) { + for (i = 0; i < 32; i++) { + if (((uint32_t *)input_tuple)[j] & (1 << (31 - i))) { + ret ^= ((const uint32_t *)rss_key)[j] << i | + (uint32_t)((uint64_t)(((const uint32_t *)rss_key)[j + 1]) >> (32 - i)); + } + } + } + return ret; +} + +#ifdef __cplusplus +} +#endif + +#endif /* _RTE_THASH_H */