X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=app%2Ftest-pmd%2Fcsumonly.c;h=c180ff28fd0d182d21c3777fa320830ecb1deeb9;hb=ff708facfcbf42f3dcb3c62d82ecd93e7b8c2506;hp=d1e1a4e273dabc5ce6bf31786e714b09143a22fb;hpb=013af9b6b64f6e72aed00aead63c2842c7c4ff4f;p=dpdk.git diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index d1e1a4e273..c180ff28fd 100644 --- a/app/test-pmd/csumonly.c +++ b/app/test-pmd/csumonly.c @@ -1,35 +1,35 @@ /*- * BSD LICENSE - * - * Copyright(c) 2010-2012 Intel Corporation. All rights reserved. + * + * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * Copyright 2014 6WIND S.A. * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions + * + * 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 + * + * * 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 + * * 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 + * * 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 + * + * 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 @@ -51,7 +51,6 @@ #include #include #include -#include #include #include #include @@ -74,162 +73,430 @@ #include #include "testpmd.h" - - #define IP_DEFTTL 64 /* from RFC 1340. */ #define IP_VERSION 0x40 #define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */ #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN) -/* Pseudo Header for IPv4/UDP/TCP checksum */ -struct psd_header { - uint32_t src_addr; /* IP address of source host. */ - uint32_t dst_addr; /* IP address of destination host(s). */ - uint8_t zero; /* zero. */ - uint8_t proto; /* L4 protocol type. */ - uint16_t len; /* L4 length. */ -} __attribute__((__packed__)); +#define GRE_KEY_PRESENT 0x2000 +#define GRE_KEY_LEN 4 +#define GRE_SUPPORTED_FIELDS GRE_KEY_PRESENT +/* We cannot use rte_cpu_to_be_16() on a constant in a switch/case */ +#if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN +#define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8))) +#else +#define _htons(x) (x) +#endif -/* Pseudo Header for IPv6/UDP/TCP checksum */ -struct ipv6_psd_header { - uint8_t src_addr[16]; /* IP address of source host. */ - uint8_t dst_addr[16]; /* IP address of destination host(s). */ - uint32_t len; /* L4 length. */ - uint8_t zero[3]; /* zero. */ - uint8_t proto; /* L4 protocol. */ -} __attribute__((__packed__)); +/* structure that caches offload info for the current packet */ +struct testpmd_offload_info { + uint16_t ethertype; + uint16_t l2_len; + uint16_t l3_len; + uint16_t l4_len; + uint8_t l4_proto; + uint8_t is_tunnel; + uint16_t outer_ethertype; + uint16_t outer_l2_len; + uint16_t outer_l3_len; + uint8_t outer_l4_proto; + uint16_t tso_segsz; +}; +/* simplified GRE header */ +struct simple_gre_hdr { + uint16_t flags; + uint16_t proto; +}; -static inline uint16_t -get_16b_sum(uint16_t *ptr16, uint32_t nr) +static uint16_t +get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags) { - uint32_t sum = 0; - while (nr > 1) - { - sum +=*ptr16; - nr -= sizeof(uint16_t); - ptr16++; - if (sum > UINT16_MAX) - sum -= UINT16_MAX; - } - - /* If length is in odd bytes */ - if (nr) - sum += *((uint8_t*)ptr16); + if (ethertype == _htons(ETHER_TYPE_IPv4)) + return rte_ipv4_phdr_cksum(l3_hdr, ol_flags); + else /* assume ethertype == ETHER_TYPE_IPv6 */ + return rte_ipv6_phdr_cksum(l3_hdr, ol_flags); +} - sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff); - sum &= 0x0ffff; - return (uint16_t)sum; +static uint16_t +get_udptcp_checksum(void *l3_hdr, void *l4_hdr, uint16_t ethertype) +{ + if (ethertype == _htons(ETHER_TYPE_IPv4)) + return rte_ipv4_udptcp_cksum(l3_hdr, l4_hdr); + else /* assume ethertype == ETHER_TYPE_IPv6 */ + return rte_ipv6_udptcp_cksum(l3_hdr, l4_hdr); } -static inline uint16_t -get_ipv4_cksum(struct ipv4_hdr *ipv4_hdr) +/* Parse an IPv4 header to fill l3_len, l4_len, and l4_proto */ +static void +parse_ipv4(struct ipv4_hdr *ipv4_hdr, struct testpmd_offload_info *info) { - uint16_t cksum; - cksum = get_16b_sum((uint16_t*)ipv4_hdr, sizeof(struct ipv4_hdr)); - return (uint16_t)((cksum == 0xffff)?cksum:~cksum); + struct tcp_hdr *tcp_hdr; + + info->l3_len = (ipv4_hdr->version_ihl & 0x0f) * 4; + info->l4_proto = ipv4_hdr->next_proto_id; + + /* only fill l4_len for TCP, it's useful for TSO */ + if (info->l4_proto == IPPROTO_TCP) { + tcp_hdr = (struct tcp_hdr *)((char *)ipv4_hdr + info->l3_len); + info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2; + } else + info->l4_len = 0; } +/* Parse an IPv6 header to fill l3_len, l4_len, and l4_proto */ +static void +parse_ipv6(struct ipv6_hdr *ipv6_hdr, struct testpmd_offload_info *info) +{ + struct tcp_hdr *tcp_hdr; + + info->l3_len = sizeof(struct ipv6_hdr); + info->l4_proto = ipv6_hdr->proto; + + /* only fill l4_len for TCP, it's useful for TSO */ + if (info->l4_proto == IPPROTO_TCP) { + tcp_hdr = (struct tcp_hdr *)((char *)ipv6_hdr + info->l3_len); + info->l4_len = (tcp_hdr->data_off & 0xf0) >> 2; + } else + info->l4_len = 0; +} -static inline uint16_t -get_ipv4_psd_sum (struct ipv4_hdr * ip_hdr) +/* + * Parse an ethernet header to fill the ethertype, l2_len, l3_len and + * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan + * header. The l4_len argument is only set in case of TCP (useful for TSO). + */ +static void +parse_ethernet(struct ether_hdr *eth_hdr, struct testpmd_offload_info *info) { - struct psd_header psd_hdr; - psd_hdr.src_addr = ip_hdr->src_addr; - psd_hdr.dst_addr = ip_hdr->dst_addr; - psd_hdr.zero = 0; - psd_hdr.proto = ip_hdr->next_proto_id; - psd_hdr.len = rte_cpu_to_be_16((uint16_t)(rte_be_to_cpu_16(ip_hdr->total_length) - - sizeof(struct ipv4_hdr))); - return get_16b_sum((uint16_t*)&psd_hdr, sizeof(struct psd_header)); + struct ipv4_hdr *ipv4_hdr; + struct ipv6_hdr *ipv6_hdr; + + info->l2_len = sizeof(struct ether_hdr); + info->ethertype = eth_hdr->ether_type; + + if (info->ethertype == _htons(ETHER_TYPE_VLAN)) { + struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1); + + info->l2_len += sizeof(struct vlan_hdr); + info->ethertype = vlan_hdr->eth_proto; + } + + switch (info->ethertype) { + case _htons(ETHER_TYPE_IPv4): + ipv4_hdr = (struct ipv4_hdr *) ((char *)eth_hdr + info->l2_len); + parse_ipv4(ipv4_hdr, info); + break; + case _htons(ETHER_TYPE_IPv6): + ipv6_hdr = (struct ipv6_hdr *) ((char *)eth_hdr + info->l2_len); + parse_ipv6(ipv6_hdr, info); + break; + default: + info->l4_len = 0; + info->l3_len = 0; + info->l4_proto = 0; + break; + } } -static inline uint16_t -get_ipv6_psd_sum (struct ipv6_hdr * ip_hdr) +/* Parse a vxlan header */ +static void +parse_vxlan(struct udp_hdr *udp_hdr, struct testpmd_offload_info *info, + uint64_t mbuf_olflags) { - struct ipv6_psd_header psd_hdr; - rte_memcpy(&psd_hdr.src_addr, ip_hdr->src_addr, sizeof(ip_hdr->src_addr) - + sizeof(ip_hdr->dst_addr)); + struct ether_hdr *eth_hdr; + + /* check udp destination port, 4789 is the default vxlan port + * (rfc7348) or that the rx offload flag is set (i40e only + * currently) */ + if (udp_hdr->dst_port != _htons(4789) && + (mbuf_olflags & (PKT_RX_TUNNEL_IPV4_HDR | + PKT_RX_TUNNEL_IPV6_HDR)) == 0) + return; - psd_hdr.zero[0] = 0; - psd_hdr.zero[1] = 0; - psd_hdr.zero[2] = 0; - psd_hdr.proto = ip_hdr->proto; - psd_hdr.len = ip_hdr->payload_len; + info->is_tunnel = 1; + info->outer_ethertype = info->ethertype; + info->outer_l2_len = info->l2_len; + info->outer_l3_len = info->l3_len; + info->outer_l4_proto = info->l4_proto; - return get_16b_sum((uint16_t*)&psd_hdr, sizeof(struct ipv6_psd_header)); + eth_hdr = (struct ether_hdr *)((char *)udp_hdr + + sizeof(struct udp_hdr) + + sizeof(struct vxlan_hdr)); + + parse_ethernet(eth_hdr, info); + info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */ } -static inline uint16_t -get_ipv4_udptcp_checksum(struct ipv4_hdr *ipv4_hdr, uint16_t *l4_hdr) +/* Parse a gre header */ +static void +parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info) { - uint32_t cksum; - uint32_t l4_len; + struct ether_hdr *eth_hdr; + struct ipv4_hdr *ipv4_hdr; + struct ipv6_hdr *ipv6_hdr; + uint8_t gre_len = 0; + + /* check which fields are supported */ + if ((gre_hdr->flags & _htons(~GRE_SUPPORTED_FIELDS)) != 0) + return; + + gre_len += sizeof(struct simple_gre_hdr); + + if (gre_hdr->flags & _htons(GRE_KEY_PRESENT)) + gre_len += GRE_KEY_LEN; + + if (gre_hdr->proto == _htons(ETHER_TYPE_IPv4)) { + info->is_tunnel = 1; + info->outer_ethertype = info->ethertype; + info->outer_l2_len = info->l2_len; + info->outer_l3_len = info->l3_len; + info->outer_l4_proto = info->l4_proto; + + ipv4_hdr = (struct ipv4_hdr *)((char *)gre_hdr + gre_len); + + parse_ipv4(ipv4_hdr, info); + info->ethertype = _htons(ETHER_TYPE_IPv4); + info->l2_len = 0; + + } else if (gre_hdr->proto == _htons(ETHER_TYPE_IPv6)) { + info->is_tunnel = 1; + info->outer_ethertype = info->ethertype; + info->outer_l2_len = info->l2_len; + info->outer_l3_len = info->l3_len; + info->outer_l4_proto = info->l4_proto; + + ipv6_hdr = (struct ipv6_hdr *)((char *)gre_hdr + gre_len); - l4_len = rte_be_to_cpu_16(ipv4_hdr->total_length) - sizeof(struct ipv4_hdr); + info->ethertype = _htons(ETHER_TYPE_IPv6); + parse_ipv6(ipv6_hdr, info); + info->l2_len = 0; - cksum = get_16b_sum(l4_hdr, l4_len); - cksum += get_ipv4_psd_sum(ipv4_hdr); + } else if (gre_hdr->proto == _htons(ETHER_TYPE_TEB)) { + info->is_tunnel = 1; + info->outer_ethertype = info->ethertype; + info->outer_l2_len = info->l2_len; + info->outer_l3_len = info->l3_len; + info->outer_l4_proto = info->l4_proto; - cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff); - cksum = (~cksum) & 0xffff; - if (cksum == 0) - cksum = 0xffff; - return (uint16_t)cksum; + eth_hdr = (struct ether_hdr *)((char *)gre_hdr + gre_len); + parse_ethernet(eth_hdr, info); + } else + return; + + info->l2_len += gre_len; } -static inline uint16_t -get_ipv6_udptcp_checksum(struct ipv6_hdr *ipv6_hdr, uint16_t *l4_hdr) + +/* Parse an encapsulated ip or ipv6 header */ +static void +parse_encap_ip(void *encap_ip, struct testpmd_offload_info *info) { - uint32_t cksum; - uint32_t l4_len; + struct ipv4_hdr *ipv4_hdr = encap_ip; + struct ipv6_hdr *ipv6_hdr = encap_ip; + uint8_t ip_version; - l4_len = rte_be_to_cpu_16(ipv6_hdr->payload_len); + ip_version = (ipv4_hdr->version_ihl & 0xf0) >> 4; - cksum = get_16b_sum(l4_hdr, l4_len); - cksum += get_ipv6_psd_sum(ipv6_hdr); + if (ip_version != 4 && ip_version != 6) + return; - cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff); - cksum = (~cksum) & 0xffff; - if (cksum == 0) - cksum = 0xffff; + info->is_tunnel = 1; + info->outer_ethertype = info->ethertype; + info->outer_l2_len = info->l2_len; + info->outer_l3_len = info->l3_len; + + if (ip_version == 4) { + parse_ipv4(ipv4_hdr, info); + info->ethertype = _htons(ETHER_TYPE_IPv4); + } else { + parse_ipv6(ipv6_hdr, info); + info->ethertype = _htons(ETHER_TYPE_IPv6); + } + info->l2_len = 0; +} + +/* modify the IPv4 or IPv4 source address of a packet */ +static void +change_ip_addresses(void *l3_hdr, uint16_t ethertype) +{ + struct ipv4_hdr *ipv4_hdr = l3_hdr; + struct ipv6_hdr *ipv6_hdr = l3_hdr; + + if (ethertype == _htons(ETHER_TYPE_IPv4)) { + ipv4_hdr->src_addr = + rte_cpu_to_be_32(rte_be_to_cpu_32(ipv4_hdr->src_addr) + 1); + } else if (ethertype == _htons(ETHER_TYPE_IPv6)) { + ipv6_hdr->src_addr[15] = ipv6_hdr->src_addr[15] + 1; + } +} + +/* if possible, calculate the checksum of a packet in hw or sw, + * depending on the testpmd command line configuration */ +static uint64_t +process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info, + uint16_t testpmd_ol_flags) +{ + struct ipv4_hdr *ipv4_hdr = l3_hdr; + struct udp_hdr *udp_hdr; + struct tcp_hdr *tcp_hdr; + struct sctp_hdr *sctp_hdr; + uint64_t ol_flags = 0; + + if (info->ethertype == _htons(ETHER_TYPE_IPv4)) { + ipv4_hdr = l3_hdr; + ipv4_hdr->hdr_checksum = 0; + + ol_flags |= PKT_TX_IPV4; + if (info->tso_segsz != 0 && info->l4_proto == IPPROTO_TCP) { + ol_flags |= PKT_TX_IP_CKSUM; + } else { + if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM) + ol_flags |= PKT_TX_IP_CKSUM; + else + ipv4_hdr->hdr_checksum = + rte_ipv4_cksum(ipv4_hdr); + } + } else if (info->ethertype == _htons(ETHER_TYPE_IPv6)) + ol_flags |= PKT_TX_IPV6; + else + return 0; /* packet type not supported, nothing to do */ + + if (info->l4_proto == IPPROTO_UDP) { + udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len); + /* do not recalculate udp cksum if it was 0 */ + if (udp_hdr->dgram_cksum != 0) { + udp_hdr->dgram_cksum = 0; + if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_UDP_CKSUM) { + ol_flags |= PKT_TX_UDP_CKSUM; + udp_hdr->dgram_cksum = get_psd_sum(l3_hdr, + info->ethertype, ol_flags); + } else { + udp_hdr->dgram_cksum = + get_udptcp_checksum(l3_hdr, udp_hdr, + info->ethertype); + } + } + } else if (info->l4_proto == IPPROTO_TCP) { + tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len); + tcp_hdr->cksum = 0; + if (info->tso_segsz != 0) { + ol_flags |= PKT_TX_TCP_SEG; + tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype, + ol_flags); + } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_TCP_CKSUM) { + ol_flags |= PKT_TX_TCP_CKSUM; + tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype, + ol_flags); + } else { + tcp_hdr->cksum = + get_udptcp_checksum(l3_hdr, tcp_hdr, + info->ethertype); + } + } else if (info->l4_proto == IPPROTO_SCTP) { + sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len); + sctp_hdr->cksum = 0; + /* sctp payload must be a multiple of 4 to be + * offloaded */ + if ((testpmd_ol_flags & TESTPMD_TX_OFFLOAD_SCTP_CKSUM) && + ((ipv4_hdr->total_length & 0x3) == 0)) { + ol_flags |= PKT_TX_SCTP_CKSUM; + } else { + /* XXX implement CRC32c, example available in + * RFC3309 */ + } + } - return (uint16_t)cksum; + return ol_flags; } +/* Calculate the checksum of outer header (only vxlan is supported, + * meaning IP + UDP). The caller already checked that it's a vxlan + * packet */ +static uint64_t +process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info, + uint16_t testpmd_ol_flags) +{ + struct ipv4_hdr *ipv4_hdr = outer_l3_hdr; + struct ipv6_hdr *ipv6_hdr = outer_l3_hdr; + struct udp_hdr *udp_hdr; + uint64_t ol_flags = 0; + + if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) { + ipv4_hdr->hdr_checksum = 0; + ol_flags |= PKT_TX_OUTER_IPV4; + + if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) + ol_flags |= PKT_TX_OUTER_IP_CKSUM; + else + ipv4_hdr->hdr_checksum = rte_ipv4_cksum(ipv4_hdr); + } else if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) + ol_flags |= PKT_TX_OUTER_IPV6; + + if (info->outer_l4_proto != IPPROTO_UDP) + return ol_flags; + + /* outer UDP checksum is always done in software as we have no + * hardware supporting it today, and no API for it. */ + + udp_hdr = (struct udp_hdr *)((char *)outer_l3_hdr + info->outer_l3_len); + /* do not recalculate udp cksum if it was 0 */ + if (udp_hdr->dgram_cksum != 0) { + udp_hdr->dgram_cksum = 0; + if (info->outer_ethertype == _htons(ETHER_TYPE_IPv4)) + udp_hdr->dgram_cksum = + rte_ipv4_udptcp_cksum(ipv4_hdr, udp_hdr); + else + udp_hdr->dgram_cksum = + rte_ipv6_udptcp_cksum(ipv6_hdr, udp_hdr); + } + + return ol_flags; +} /* - * Forwarding of packets. Change the checksum field with HW or SW methods - * The HW/SW method selection depends on the ol_flags on every packet + * Receive a burst of packets, and for each packet: + * - parse packet, and try to recognize a supported packet type (1) + * - if it's not a supported packet type, don't touch the packet, else: + * - modify the IPs in inner headers and in outer headers if any + * - reprocess the checksum of all supported layers. This is done in SW + * or HW, depending on testpmd command line configuration + * - if TSO is enabled in testpmd command line, also flag the mbuf for TCP + * segmentation offload (this implies HW TCP checksum) + * Then transmit packets on the output port. + * + * (1) Supported packets are: + * Ether / (vlan) / IP|IP6 / UDP|TCP|SCTP . + * Ether / (vlan) / outer IP|IP6 / outer UDP / VxLAN / Ether / IP|IP6 / + * UDP|TCP|SCTP + * Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP + * Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP + * Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP + * + * The testpmd command line for this forward engine sets the flags + * TESTPMD_TX_OFFLOAD_* in ports[tx_port].tx_ol_flags. They control + * wether a checksum must be calculated in software or in hardware. The + * IP, UDP, TCP and SCTP flags always concern the inner layer. The + * OUTER_IP is only useful for tunnel packets. */ static void pkt_burst_checksum_forward(struct fwd_stream *fs) { - struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; - struct rte_port *txp; - struct rte_mbuf *mb; + struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; + struct rte_port *txp; + struct rte_mbuf *m; struct ether_hdr *eth_hdr; - struct ipv4_hdr *ipv4_hdr; - struct ipv6_hdr *ipv6_hdr; - struct udp_hdr *udp_hdr; - struct tcp_hdr *tcp_hdr; - struct sctp_hdr *sctp_hdr; - + void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */ uint16_t nb_rx; uint16_t nb_tx; uint16_t i; - uint16_t ol_flags; - uint16_t pkt_ol_flags; - uint16_t tx_ol_flags; - uint16_t l4_proto; - uint16_t eth_type; - uint8_t l2_len; - uint8_t l3_len; - + uint64_t ol_flags; + uint16_t testpmd_ol_flags; uint32_t rx_bad_ip_csum; uint32_t rx_bad_l4_csum; + struct testpmd_offload_info info; #ifdef RTE_TEST_PMD_RECORD_CORE_CYCLES uint64_t start_tsc; @@ -241,9 +508,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) start_tsc = rte_rdtsc(); #endif - /* - * Receive a burst of packets and forward them. - */ + /* receive a burst of packet */ nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst, nb_pkt_per_burst); if (unlikely(nb_rx == 0)) @@ -257,185 +522,162 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) rx_bad_l4_csum = 0; txp = &ports[fs->tx_port]; - tx_ol_flags = txp->tx_ol_flags; + testpmd_ol_flags = txp->tx_ol_flags; + memset(&info, 0, sizeof(info)); + info.tso_segsz = txp->tso_segsz; for (i = 0; i < nb_rx; i++) { - mb = pkts_burst[i]; - l2_len = sizeof(struct ether_hdr); - pkt_ol_flags = mb->ol_flags; - ol_flags = (uint16_t) (pkt_ol_flags & (~PKT_TX_L4_MASK)); - - eth_hdr = (struct ether_hdr *) mb->pkt.data; - eth_type = rte_be_to_cpu_16(eth_hdr->ether_type); - if (eth_type == ETHER_TYPE_VLAN) { - /* Only allow single VLAN label here */ - l2_len += sizeof(struct vlan_hdr); - eth_type = rte_be_to_cpu_16(*(uint16_t *) - ((uintptr_t)ð_hdr->ether_type + - sizeof(struct vlan_hdr))); + ol_flags = 0; + info.is_tunnel = 0; + m = pkts_burst[i]; + + /* Update the L3/L4 checksum error packet statistics */ + rx_bad_ip_csum += ((m->ol_flags & PKT_RX_IP_CKSUM_BAD) != 0); + rx_bad_l4_csum += ((m->ol_flags & PKT_RX_L4_CKSUM_BAD) != 0); + + /* step 1: dissect packet, parsing optional vlan, ip4/ip6, vxlan + * and inner headers */ + + eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); + parse_ethernet(eth_hdr, &info); + l3_hdr = (char *)eth_hdr + info.l2_len; + + /* check if it's a supported tunnel */ + if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) { + if (info.l4_proto == IPPROTO_UDP) { + struct udp_hdr *udp_hdr; + udp_hdr = (struct udp_hdr *)((char *)l3_hdr + + info.l3_len); + parse_vxlan(udp_hdr, &info, m->ol_flags); + } else if (info.l4_proto == IPPROTO_GRE) { + struct simple_gre_hdr *gre_hdr; + gre_hdr = (struct simple_gre_hdr *) + ((char *)l3_hdr + info.l3_len); + parse_gre(gre_hdr, &info); + } else if (info.l4_proto == IPPROTO_IPIP) { + void *encap_ip_hdr; + encap_ip_hdr = (char *)l3_hdr + info.l3_len; + parse_encap_ip(encap_ip_hdr, &info); + } } - /* Update the L3/L4 checksum error packet count */ - rx_bad_ip_csum += (uint16_t) ((pkt_ol_flags & PKT_RX_IP_CKSUM_BAD) != 0); - rx_bad_l4_csum += (uint16_t) ((pkt_ol_flags & PKT_RX_L4_CKSUM_BAD) != 0); - - /* - * Try to figure out L3 packet type by SW. - */ - if ((pkt_ol_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT | - PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) == 0) { - if (eth_type == ETHER_TYPE_IPv4) - pkt_ol_flags |= PKT_RX_IPV4_HDR; - else if (eth_type == ETHER_TYPE_IPv6) - pkt_ol_flags |= PKT_RX_IPV6_HDR; + /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */ + if (info.is_tunnel) { + outer_l3_hdr = l3_hdr; + l3_hdr = (char *)l3_hdr + info.outer_l3_len + info.l2_len; } - /* - * Simplify the protocol parsing - * Assuming the incoming packets format as - * Ethernet2 + optional single VLAN - * + ipv4 or ipv6 - * + udp or tcp or sctp or others - */ - if (pkt_ol_flags & PKT_RX_IPV4_HDR) { + /* step 2: change all source IPs (v4 or v6) so we need + * to recompute the chksums even if they were correct */ - /* Do not support ipv4 option field */ - l3_len = sizeof(struct ipv4_hdr) ; + change_ip_addresses(l3_hdr, info.ethertype); + if (info.is_tunnel == 1) + change_ip_addresses(outer_l3_hdr, info.outer_ethertype); - ipv4_hdr = (struct ipv4_hdr *) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len); + /* step 3: depending on user command line configuration, + * recompute checksum either in software or flag the + * mbuf to offload the calculation to the NIC. If TSO + * is configured, prepare the mbuf for TCP segmentation. */ - l4_proto = ipv4_hdr->next_proto_id; + /* process checksums of inner headers first */ + ol_flags |= process_inner_cksums(l3_hdr, &info, testpmd_ol_flags); - /* Do not delete, this is required by HW*/ - ipv4_hdr->hdr_checksum = 0; + /* Then process outer headers if any. Note that the software + * checksum will be wrong if one of the inner checksums is + * processed in hardware. */ + if (info.is_tunnel == 1) { + ol_flags |= process_outer_cksums(outer_l3_hdr, &info, + testpmd_ol_flags); + } - if (tx_ol_flags & 0x1) { - /* HW checksum */ - ol_flags |= PKT_TX_IP_CKSUM; - } - else { - /* SW checksum calculation */ - ipv4_hdr->src_addr++; - ipv4_hdr->hdr_checksum = get_ipv4_cksum(ipv4_hdr); - } + /* step 4: fill the mbuf meta data (flags and header lengths) */ - if (l4_proto == IPPROTO_UDP) { - udp_hdr = (struct udp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - if (tx_ol_flags & 0x2) { - /* HW Offload */ - ol_flags |= PKT_TX_UDP_CKSUM; - /* Pseudo header sum need be set properly */ - udp_hdr->dgram_cksum = get_ipv4_psd_sum(ipv4_hdr); - } - else { - /* SW Implementation, clear checksum field first */ - udp_hdr->dgram_cksum = 0; - udp_hdr->dgram_cksum = get_ipv4_udptcp_checksum(ipv4_hdr, - (uint16_t*)udp_hdr); - } - } - else if (l4_proto == IPPROTO_TCP){ - tcp_hdr = (struct tcp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - if (tx_ol_flags & 0x4) { - ol_flags |= PKT_TX_TCP_CKSUM; - tcp_hdr->cksum = get_ipv4_psd_sum(ipv4_hdr); - } - else { - tcp_hdr->cksum = 0; - tcp_hdr->cksum = get_ipv4_udptcp_checksum(ipv4_hdr, - (uint16_t*)tcp_hdr); - } + if (info.is_tunnel == 1) { + if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) { + m->outer_l2_len = info.outer_l2_len; + m->outer_l3_len = info.outer_l3_len; + m->l2_len = info.l2_len; + m->l3_len = info.l3_len; + m->l4_len = info.l4_len; } - else if (l4_proto == IPPROTO_SCTP) { - sctp_hdr = (struct sctp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - - if (tx_ol_flags & 0x8) { - ol_flags |= PKT_TX_SCTP_CKSUM; - sctp_hdr->cksum = 0; - - /* Sanity check, only number of 4 bytes supported */ - if ((rte_be_to_cpu_16(ipv4_hdr->total_length) % 4) != 0) - printf("sctp payload must be a multiple " - "of 4 bytes for checksum offload"); - } - else { - sctp_hdr->cksum = 0; - /* CRC32c sample code available in RFC3309 */ - } + else { + /* if there is a outer UDP cksum + processed in sw and the inner in hw, + the outer checksum will be wrong as + the payload will be modified by the + hardware */ + m->l2_len = info.outer_l2_len + + info.outer_l3_len + info.l2_len; + m->l3_len = info.l3_len; + m->l4_len = info.l4_len; } - /* End of L4 Handling*/ + } else { + /* this is only useful if an offload flag is + * set, but it does not hurt to fill it in any + * case */ + m->l2_len = info.l2_len; + m->l3_len = info.l3_len; + m->l4_len = info.l4_len; } - else if (pkt_ol_flags & PKT_RX_IPV6_HDR) { - - ipv6_hdr = (struct ipv6_hdr *) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len); - l3_len = sizeof(struct ipv6_hdr) ; - l4_proto = ipv6_hdr->proto; - - if (l4_proto == IPPROTO_UDP) { - udp_hdr = (struct udp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - if (tx_ol_flags & 0x2) { - /* HW Offload */ - ol_flags |= PKT_TX_UDP_CKSUM; - udp_hdr->dgram_cksum = get_ipv6_psd_sum(ipv6_hdr); - } - else { - /* SW Implementation */ - /* checksum field need be clear first */ - udp_hdr->dgram_cksum = 0; - udp_hdr->dgram_cksum = get_ipv6_udptcp_checksum(ipv6_hdr, - (uint16_t*)udp_hdr); - } - } - else if (l4_proto == IPPROTO_TCP) { - tcp_hdr = (struct tcp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - if (tx_ol_flags & 0x4) { - ol_flags |= PKT_TX_TCP_CKSUM; - tcp_hdr->cksum = get_ipv6_psd_sum(ipv6_hdr); - } - else { - tcp_hdr->cksum = 0; - tcp_hdr->cksum = get_ipv6_udptcp_checksum(ipv6_hdr, - (uint16_t*)tcp_hdr); - } + m->tso_segsz = info.tso_segsz; + m->ol_flags = ol_flags; + + /* if verbose mode is enabled, dump debug info */ + if (verbose_level > 0) { + struct { + uint64_t flag; + uint64_t mask; + } tx_flags[] = { + { PKT_TX_IP_CKSUM, PKT_TX_IP_CKSUM }, + { PKT_TX_UDP_CKSUM, PKT_TX_L4_MASK }, + { PKT_TX_TCP_CKSUM, PKT_TX_L4_MASK }, + { PKT_TX_SCTP_CKSUM, PKT_TX_L4_MASK }, + { PKT_TX_IPV4, PKT_TX_IPV4 }, + { PKT_TX_IPV6, PKT_TX_IPV6 }, + { PKT_TX_OUTER_IP_CKSUM, PKT_TX_OUTER_IP_CKSUM }, + { PKT_TX_OUTER_IPV4, PKT_TX_OUTER_IPV4 }, + { PKT_TX_OUTER_IPV6, PKT_TX_OUTER_IPV6 }, + { PKT_TX_TCP_SEG, PKT_TX_TCP_SEG }, + }; + unsigned j; + const char *name; + + printf("-----------------\n"); + /* dump rx parsed packet info */ + printf("rx: l2_len=%d ethertype=%x l3_len=%d " + "l4_proto=%d l4_len=%d\n", + info.l2_len, rte_be_to_cpu_16(info.ethertype), + info.l3_len, info.l4_proto, info.l4_len); + if (info.is_tunnel == 1) + printf("rx: outer_l2_len=%d outer_ethertype=%x " + "outer_l3_len=%d\n", info.outer_l2_len, + rte_be_to_cpu_16(info.outer_ethertype), + info.outer_l3_len); + /* dump tx packet info */ + if ((testpmd_ol_flags & (TESTPMD_TX_OFFLOAD_IP_CKSUM | + TESTPMD_TX_OFFLOAD_UDP_CKSUM | + TESTPMD_TX_OFFLOAD_TCP_CKSUM | + TESTPMD_TX_OFFLOAD_SCTP_CKSUM)) || + info.tso_segsz != 0) + printf("tx: m->l2_len=%d m->l3_len=%d " + "m->l4_len=%d\n", + m->l2_len, m->l3_len, m->l4_len); + if ((info.is_tunnel == 1) && + (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)) + printf("tx: m->outer_l2_len=%d m->outer_l3_len=%d\n", + m->outer_l2_len, m->outer_l3_len); + if (info.tso_segsz != 0) + printf("tx: m->tso_segsz=%d\n", m->tso_segsz); + printf("tx: flags="); + for (j = 0; j < sizeof(tx_flags)/sizeof(*tx_flags); j++) { + name = rte_get_tx_ol_flag_name(tx_flags[j].flag); + if ((m->ol_flags & tx_flags[j].mask) == + tx_flags[j].flag) + printf("%s ", name); } - else if (l4_proto == IPPROTO_SCTP) { - sctp_hdr = (struct sctp_hdr*) (rte_pktmbuf_mtod(mb, - unsigned char *) + l2_len + l3_len); - - if (tx_ol_flags & 0x8) { - ol_flags |= PKT_TX_SCTP_CKSUM; - sctp_hdr->cksum = 0; - /* Sanity check, only number of 4 bytes supported by HW */ - if ((rte_be_to_cpu_16(ipv6_hdr->payload_len) % 4) != 0) - printf("sctp payload must be a multiple " - "of 4 bytes for checksum offload"); - } - else { - /* CRC32c sample code available in RFC3309 */ - sctp_hdr->cksum = 0; - } - } else { - printf("Test flow control for 1G PMD \n"); - } - /* End of L6 Handling*/ - } - else { - l3_len = 0; - printf("Unhandled packet type: %#hx\n", eth_type); + printf("\n"); } - - /* Combine the packet header write. VLAN is not consider here */ - mb->pkt.vlan_macip.f.l2_len = l2_len; - mb->pkt.vlan_macip.f.l3_len = l3_len; - mb->ol_flags = ol_flags; } nb_tx = rte_eth_tx_burst(fs->tx_port, fs->tx_queue, pkts_burst, nb_rx); fs->tx_packets += nb_tx; @@ -458,7 +700,6 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) #endif } - struct fwd_engine csum_fwd_engine = { .fwd_mode_name = "csum", .port_fwd_begin = NULL,