Hi Jianfeng,
>
> +/* Requirements:
> + * 1. IP packets without extension;
> + * 2. L4 payload should be either TCP or UDP.
> + */
> +int
> +em_check_ptype(int portid)
> +{
> + int i, ret;
> + int ptype_l3_ipv4_ext = 0;
> + int ptype_l3_ipv6_ext = 0;
> + int ptype_l4_tcp = 0;
> + int ptype_l4_udp = 0;
> +
> + ret = rte_eth_dev_get_ptype_info(portid,
> + RTE_PTYPE_L3_MASK | RTE_PTYPE_L4_MASK,
> + NULL, 0);
> + if (ret <= 0)
> + return 0;
> +
> + uint32_t ptypes[ret];
> +
> + ret = rte_eth_dev_get_ptype_info(portid,
> + RTE_PTYPE_L3_MASK | RTE_PTYPE_L4_MASK,
> + ptypes, ret);
> + for (i = 0; i < ret; ++i) {
> + switch (ptypes[i]) {
> + case RTE_PTYPE_L3_IPV4_EXT:
> + ptype_l3_ipv4_ext = 1;
> + break;
> + case RTE_PTYPE_L3_IPV6_EXT:
> + ptype_l3_ipv6_ext = 1;
> + break;
> + case RTE_PTYPE_L4_TCP:
> + ptype_l4_tcp = 1;
> + break;
> + case RTE_PTYPE_L4_UDP:
> + ptype_l4_udp = 1;
> + break;
> + }
> + }
> +
> + if (ptype_l3_ipv4_ext == 0)
> + printf("port %d cannot parse RTE_PTYPE_L3_IPV4_EXT\n", portid);
> + if (ptype_l3_ipv6_ext == 0)
> + printf("port %d cannot parse RTE_PTYPE_L3_IPV6_EXT\n", portid);
> + if (!ptype_l3_ipv4_ext || !ptype_l3_ipv6_ext)
> + return 0;
> +
> + if (ptype_l4_tcp == 0)
> + printf("port %d cannot parse RTE_PTYPE_L4_TCP\n", portid);
> + if (ptype_l4_udp == 0)
> + printf("port %d cannot parse RTE_PTYPE_L4_UDP\n", portid);
> + if (ptype_l4_tcp || ptype_l4_udp)
> + return 1;
Should probably be: if (ptype_l4_tcp && ptype_l4_udp)
?
> +
> + return 0;
> +}
> +
> +static inline void
> +em_parse_ptype(struct rte_mbuf *m)
> +{
> + struct ether_hdr *eth_hdr;
> + uint32_t packet_type = RTE_PTYPE_UNKNOWN;
> + uint16_t ethertype;
> + void *l3;
> + int hdr_len;
> + struct ipv4_hdr *ipv4_hdr;
> + struct ipv6_hdr *ipv6_hdr;
> +
> + eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
> + ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
I think you can avoid bswap here, if use constants in BE format
for comparison instead:
ethertype = eth_hdr->ether_type;
switch (ethertype) {
case (rte_cpu_to_be_16(ETHER_TYPE_IPv4)):
...
Same for lpm.
>
> @@ -612,6 +622,14 @@ parse_args(int argc, char **argv)
> return -1;
> }
> }
> +
> + if (!strncmp(lgopts[option_index].name,
> + CMD_LINE_OPT_PARSE_PTYPE,
> + sizeof(CMD_LINE_OPT_PARSE_PTYPE))) {
> + printf("soft parse-ptype is enabled\n");
> + parse_ptype = 1;
> + }
> +
> break;
>
> default:
> @@ -965,6 +983,40 @@ main(int argc, char **argv)
> rte_eth_promiscuous_enable(portid);
> }
>
> + printf("\n");
> +
> + for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
> + if (rte_lcore_is_enabled(lcore_id) == 0)
> + continue;
> + qconf = &lcore_conf[lcore_id];
> + for (queue = 0; queue < qconf->n_rx_queue; ++queue) {
> + portid = qconf->rx_queue_list[queue].port_id;
> + queueid = qconf->rx_queue_list[queue].queue_id;
> +
> + ret = l3fwd_lkp.check_ptype(portid);
> + if (ret) {
> + printf("Port %d: built-in packet type info\n",
> + portid);
> + continue;
> + }
I thought that if parse_ptype != 0 we always want to use a SW parsing,
no matter does HW support it or not, no?
So user can measure what is the performance difference between HW and SW
versions?
Another thing, that I forgot to ask earlier - with ptype querying in place,
would we like to set:
RTE_I40E_INC_VECTOR=y
by default?
Konstantin
