From: Jianfeng Tan Date: Mon, 26 Sep 2016 13:48:34 +0000 (+0000) Subject: app/testpmd: support tunneled TSO in checksum engine X-Git-Tag: spdx-start~5690 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0f62d63593ed;p=dpdk.git app/testpmd: support tunneled TSO in checksum engine Add a new command "tunnel_tso set " to enable segmentation offload and set MSS to tso_segsz. Another command, "tunnel_tso show " is added to show tunneled packet MSS. Result 0 means tunnel_tso is disabled. The original commands, "tso set " and "tso show " are only reponsible for non-tunneled packets. And the new commands are for tunneled packets. Below conditions are needed to make it work: a. tunnel TSO is supported by the NIC; b. "csum parse_tunnel" must be set so that tunneled pkts are recognized; c. for tunneled pkts with outer L3 is IPv4, "csum set outer-ip" must be set to hw, because after tso, total_len of outer IP header is changed, and the checksum of outer IP header calculated by sw should be wrong; that is not necessary for IPv6 tunneled pkts because there's no checksum field to be filled anymore. Suggested-by: Konstantin Ananyev Signed-off-by: Zhe Tao Signed-off-by: Jianfeng Tan Acked-by: Konstantin Ananyev --- diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c index 17d238f539..a1da8b835d 100644 --- a/app/test-pmd/cmdline.c +++ b/app/test-pmd/cmdline.c @@ -3472,7 +3472,7 @@ cmdline_parse_inst_t cmd_csum_tunnel = { }, }; -/* *** ENABLE HARDWARE SEGMENTATION IN TX PACKETS *** */ +/* *** ENABLE HARDWARE SEGMENTATION IN TX NON-TUNNELED PACKETS *** */ struct cmd_tso_set_result { cmdline_fixed_string_t tso; cmdline_fixed_string_t mode; @@ -3495,9 +3495,9 @@ cmd_tso_set_parsed(void *parsed_result, ports[res->port_id].tso_segsz = res->tso_segsz; if (ports[res->port_id].tso_segsz == 0) - printf("TSO is disabled\n"); + printf("TSO for non-tunneled packets is disabled\n"); else - printf("TSO segment size is %d\n", + printf("TSO segment size for non-tunneled packets is %d\n", ports[res->port_id].tso_segsz); /* display warnings if configuration is not supported by the NIC */ @@ -3525,8 +3525,8 @@ cmdline_parse_token_num_t cmd_tso_set_portid = cmdline_parse_inst_t cmd_tso_set = { .f = cmd_tso_set_parsed, .data = NULL, - .help_str = "Set TSO segment size for csum engine (0 to disable): " - "tso set ", + .help_str = "Set TSO segment size of non-tunneled packets " + "for csum engine (0 to disable): tso set ", .tokens = { (void *)&cmd_tso_set_tso, (void *)&cmd_tso_set_mode, @@ -3544,8 +3544,8 @@ cmdline_parse_token_string_t cmd_tso_show_mode = cmdline_parse_inst_t cmd_tso_show = { .f = cmd_tso_set_parsed, .data = NULL, - .help_str = "Show TSO segment size for csum engine: " - "tso show ", + .help_str = "Show TSO segment size of non-tunneled packets " + "for csum engine: tso show ", .tokens = { (void *)&cmd_tso_set_tso, (void *)&cmd_tso_show_mode, @@ -3554,6 +3554,122 @@ cmdline_parse_inst_t cmd_tso_show = { }, }; +/* *** ENABLE HARDWARE SEGMENTATION IN TX TUNNELED PACKETS *** */ +struct cmd_tunnel_tso_set_result { + cmdline_fixed_string_t tso; + cmdline_fixed_string_t mode; + uint16_t tso_segsz; + uint8_t port_id; +}; + +static void +check_tunnel_tso_nic_support(uint8_t port_id) +{ + struct rte_eth_dev_info dev_info; + + rte_eth_dev_info_get(port_id, &dev_info); + if (!(dev_info.tx_offload_capa & DEV_TX_OFFLOAD_VXLAN_TNL_TSO)) + printf("Warning: TSO enabled but VXLAN TUNNEL TSO not " + "supported by port %d\n", port_id); + if (!(dev_info.tx_offload_capa & DEV_TX_OFFLOAD_GRE_TNL_TSO)) + printf("Warning: TSO enabled but GRE TUNNEL TSO not " + "supported by port %d\n", port_id); + if (!(dev_info.tx_offload_capa & DEV_TX_OFFLOAD_IPIP_TNL_TSO)) + printf("Warning: TSO enabled but IPIP TUNNEL TSO not " + "supported by port %d\n", port_id); + if (!(dev_info.tx_offload_capa & DEV_TX_OFFLOAD_GENEVE_TNL_TSO)) + printf("Warning: TSO enabled but GENEVE TUNNEL TSO not " + "supported by port %d\n", port_id); +} + +static void +cmd_tunnel_tso_set_parsed(void *parsed_result, + __attribute__((unused)) struct cmdline *cl, + __attribute__((unused)) void *data) +{ + struct cmd_tunnel_tso_set_result *res = parsed_result; + + if (port_id_is_invalid(res->port_id, ENABLED_WARN)) + return; + + if (!strcmp(res->mode, "set")) + ports[res->port_id].tunnel_tso_segsz = res->tso_segsz; + + if (ports[res->port_id].tunnel_tso_segsz == 0) + printf("TSO for tunneled packets is disabled\n"); + else { + printf("TSO segment size for tunneled packets is %d\n", + ports[res->port_id].tunnel_tso_segsz); + + /* Below conditions are needed to make it work: + * (1) tunnel TSO is supported by the NIC; + * (2) "csum parse_tunnel" must be set so that tunneled pkts + * are recognized; + * (3) for tunneled pkts with outer L3 of IPv4, + * "csum set outer-ip" must be set to hw, because after tso, + * total_len of outer IP header is changed, and the checksum + * of outer IP header calculated by sw should be wrong; that + * is not necessary for IPv6 tunneled pkts because there's no + * checksum in IP header anymore. + */ + check_tunnel_tso_nic_support(res->port_id); + + if (!(ports[res->port_id].tx_ol_flags & + TESTPMD_TX_OFFLOAD_PARSE_TUNNEL)) + printf("Warning: csum parse_tunnel must be set " + "so that tunneled packets are recognized\n"); + if (!(ports[res->port_id].tx_ol_flags & + TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM)) + printf("Warning: csum set outer-ip must be set to hw " + "if outer L3 is IPv4; not necessary for IPv6\n"); + } +} + +cmdline_parse_token_string_t cmd_tunnel_tso_set_tso = + TOKEN_STRING_INITIALIZER(struct cmd_tunnel_tso_set_result, + tso, "tunnel_tso"); +cmdline_parse_token_string_t cmd_tunnel_tso_set_mode = + TOKEN_STRING_INITIALIZER(struct cmd_tunnel_tso_set_result, + mode, "set"); +cmdline_parse_token_num_t cmd_tunnel_tso_set_tso_segsz = + TOKEN_NUM_INITIALIZER(struct cmd_tunnel_tso_set_result, + tso_segsz, UINT16); +cmdline_parse_token_num_t cmd_tunnel_tso_set_portid = + TOKEN_NUM_INITIALIZER(struct cmd_tunnel_tso_set_result, + port_id, UINT8); + +cmdline_parse_inst_t cmd_tunnel_tso_set = { + .f = cmd_tunnel_tso_set_parsed, + .data = NULL, + .help_str = "Set TSO segment size of tunneled packets for csum engine " + "(0 to disable): tunnel_tso set ", + .tokens = { + (void *)&cmd_tunnel_tso_set_tso, + (void *)&cmd_tunnel_tso_set_mode, + (void *)&cmd_tunnel_tso_set_tso_segsz, + (void *)&cmd_tunnel_tso_set_portid, + NULL, + }, +}; + +cmdline_parse_token_string_t cmd_tunnel_tso_show_mode = + TOKEN_STRING_INITIALIZER(struct cmd_tunnel_tso_set_result, + mode, "show"); + + +cmdline_parse_inst_t cmd_tunnel_tso_show = { + .f = cmd_tunnel_tso_set_parsed, + .data = NULL, + .help_str = "Show TSO segment size of tunneled packets " + "for csum engine: tunnel_tso show ", + .tokens = { + (void *)&cmd_tunnel_tso_set_tso, + (void *)&cmd_tunnel_tso_show_mode, + (void *)&cmd_tunnel_tso_set_portid, + NULL, + }, +}; + /* *** ENABLE/DISABLE FLUSH ON RX STREAMS *** */ struct cmd_set_flush_rx { cmdline_fixed_string_t set; @@ -10646,6 +10762,8 @@ cmdline_parse_ctx_t main_ctx[] = { (cmdline_parse_inst_t *)&cmd_csum_tunnel, (cmdline_parse_inst_t *)&cmd_tso_set, (cmdline_parse_inst_t *)&cmd_tso_show, + (cmdline_parse_inst_t *)&cmd_tunnel_tso_set, + (cmdline_parse_inst_t *)&cmd_tunnel_tso_show, (cmdline_parse_inst_t *)&cmd_link_flow_control_set, (cmdline_parse_inst_t *)&cmd_link_flow_control_set_rx, (cmdline_parse_inst_t *)&cmd_link_flow_control_set_tx, diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index 21cb78fdce..4fe038d2d8 100644 --- a/app/test-pmd/csumonly.c +++ b/app/test-pmd/csumonly.c @@ -101,6 +101,7 @@ struct testpmd_offload_info { uint16_t outer_l3_len; uint8_t outer_l4_proto; uint16_t tso_segsz; + uint16_t tunnel_tso_segsz; }; /* simplified GRE header */ @@ -349,7 +350,9 @@ process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info, ipv4_hdr->hdr_checksum = 0; ol_flags |= PKT_TX_IPV4; - if (info->tso_segsz != 0 && info->l4_proto == IPPROTO_TCP) { + if (info->l4_proto == IPPROTO_TCP && + ((info->is_tunnel && info->tunnel_tso_segsz != 0) || + (!info->is_tunnel && info->tso_segsz != 0))) { ol_flags |= PKT_TX_IP_CKSUM; } else { if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_IP_CKSUM) @@ -381,7 +384,8 @@ process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info, } 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) { + if ((info->is_tunnel && info->tunnel_tso_segsz != 0) || + (!info->is_tunnel && info->tso_segsz != 0)) { ol_flags |= PKT_TX_TCP_SEG; tcp_hdr->cksum = get_psd_sum(l3_hdr, info->ethertype, ol_flags); @@ -411,12 +415,10 @@ process_inner_cksums(void *l3_hdr, const struct testpmd_offload_info *info, 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 */ +/* Calculate the checksum of outer header */ static uint64_t process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info, - uint16_t testpmd_ol_flags) + uint16_t testpmd_ol_flags, int tso_enabled) { struct ipv4_hdr *ipv4_hdr = outer_l3_hdr; struct ipv6_hdr *ipv6_hdr = outer_l3_hdr; @@ -437,10 +439,20 @@ process_outer_cksums(void *outer_l3_hdr, struct testpmd_offload_info *info, 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); + + /* outer UDP checksum is done in software as we have no hardware + * supporting it today, and no API for it. In the other side, for + * UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be + * set to zero. + * + * If a packet will be TSOed into small packets by NIC, we cannot + * set/calculate a non-zero checksum, because it will be a wrong + * value after the packet be split into several small packets. + */ + if (tso_enabled) + udp_hdr->dgram_cksum = 0; + /* do not recalculate udp cksum if it was 0 */ if (udp_hdr->dgram_cksum != 0) { udp_hdr->dgram_cksum = 0; @@ -674,6 +686,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) testpmd_ol_flags = txp->tx_ol_flags; memset(&info, 0, sizeof(info)); info.tso_segsz = txp->tso_segsz; + info.tunnel_tso_segsz = txp->tunnel_tso_segsz; for (i = 0; i < nb_rx; i++) { if (likely(i < nb_rx - 1)) @@ -703,18 +716,27 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) 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->packet_type); + if (info.is_tunnel) + ol_flags |= PKT_TX_TUNNEL_VXLAN; } 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); + if (info.is_tunnel) + ol_flags |= PKT_TX_TUNNEL_GRE; } 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); + if (info.is_tunnel) + ol_flags |= PKT_TX_TUNNEL_IPIP; } } @@ -744,18 +766,21 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) * processed in hardware. */ if (info.is_tunnel == 1) { ol_flags |= process_outer_cksums(outer_l3_hdr, &info, - testpmd_ol_flags); + testpmd_ol_flags, + !!(ol_flags & PKT_TX_TCP_SEG)); } /* step 4: fill the mbuf meta data (flags and header lengths) */ if (info.is_tunnel == 1) { - if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) { + if (info.tunnel_tso_segsz || + 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; + m->tso_segsz = info.tunnel_tso_segsz; } else { /* if there is a outer UDP cksum @@ -775,8 +800,8 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) m->l2_len = info.l2_len; m->l3_len = info.l3_len; m->l4_len = info.l4_len; + m->tso_segsz = info.tso_segsz; } - m->tso_segsz = info.tso_segsz; m->ol_flags = ol_flags; /* Do split & copy for the packet. */ @@ -805,6 +830,10 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) { PKT_TX_OUTER_IPV4, PKT_TX_OUTER_IPV4 }, { PKT_TX_OUTER_IPV6, PKT_TX_OUTER_IPV6 }, { PKT_TX_TCP_SEG, PKT_TX_TCP_SEG }, + { PKT_TX_TUNNEL_VXLAN, PKT_TX_TUNNEL_MASK }, + { PKT_TX_TUNNEL_GRE, PKT_TX_TUNNEL_MASK }, + { PKT_TX_TUNNEL_IPIP, PKT_TX_TUNNEL_MASK }, + { PKT_TX_TUNNEL_GENEVE, PKT_TX_TUNNEL_MASK }, }; unsigned j; const char *name; @@ -831,11 +860,17 @@ pkt_burst_checksum_forward(struct fwd_stream *fs) 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) + if (info.is_tunnel == 1) { + if (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.tunnel_tso_segsz != 0) + printf("tx: m->tso_segsz=%d\n", + m->tso_segsz); + } else 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++) { diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index 2b281cc467..881d2838ca 100644 --- a/app/test-pmd/testpmd.h +++ b/app/test-pmd/testpmd.h @@ -152,7 +152,8 @@ struct rte_port { struct fwd_stream *tx_stream; /**< Port TX stream, if unique */ unsigned int socket_id; /**< For NUMA support */ uint16_t tx_ol_flags;/**< TX Offload Flags (TESTPMD_TX_OFFLOAD...). */ - uint16_t tso_segsz; /**< MSS for segmentation offload. */ + uint16_t tso_segsz; /**< Segmentation offload MSS for non-tunneled packets. */ + uint16_t tunnel_tso_segsz; /**< Segmentation offload MSS for tunneled pkts. */ uint16_t tx_vlan_id;/**< The tag ID */ uint16_t tx_vlan_id_outer;/**< The outer tag ID */ void *fwd_ctx; /**< Forwarding mode context */