From: Marcin Baran Date: Mon, 7 Oct 2019 11:08:05 +0000 (+0100) Subject: examples/ioat: add software copy mode X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=ae368c96ee53380532eadfd0035c655e8b9a8d2c;p=dpdk.git examples/ioat: add software copy mode Added support for copying packets using software copy mode and MAC address changing. The copies are processed using one lcore. Signed-off-by: Marcin Baran Signed-off-by: Pawel Modrak Acked-by: Bruce Richardson --- diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c index b33c1eeb40..2a4da948aa 100644 --- a/examples/ioat/ioatfwd.c +++ b/examples/ioat/ioatfwd.c @@ -89,6 +89,154 @@ static struct rte_ether_addr ioat_ports_eth_addr[RTE_MAX_ETHPORTS]; static struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS]; struct rte_mempool *ioat_pktmbuf_pool; +static void +update_mac_addrs(struct rte_mbuf *m, uint32_t dest_portid) +{ + struct rte_ether_hdr *eth; + void *tmp; + + eth = rte_pktmbuf_mtod(m, struct rte_ether_hdr *); + + /* 02:00:00:00:00:xx - overwriting 2 bytes of source address but + * it's acceptable cause it gets overwritten by rte_ether_addr_copy + */ + tmp = ð->d_addr.addr_bytes[0]; + *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dest_portid << 40); + + /* src addr */ + rte_ether_addr_copy(&ioat_ports_eth_addr[dest_portid], ð->s_addr); +} + +static inline void +pktmbuf_sw_copy(struct rte_mbuf *src, struct rte_mbuf *dst) +{ + /* Copy packet metadata */ + rte_memcpy(&dst->rearm_data, + &src->rearm_data, + offsetof(struct rte_mbuf, cacheline1) + - offsetof(struct rte_mbuf, rearm_data)); + + /* Copy packet data */ + rte_memcpy(rte_pktmbuf_mtod(dst, char *), + rte_pktmbuf_mtod(src, char *), src->data_len); +} + +/* Receive packets on one port and enqueue to IOAT rawdev or rte_ring. */ +static void +ioat_rx_port(struct rxtx_port_config *rx_config) +{ + uint32_t nb_rx, nb_enq, i, j; + struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; + + for (i = 0; i < rx_config->nb_queues; i++) { + + nb_rx = rte_eth_rx_burst(rx_config->rxtx_port, i, + pkts_burst, MAX_PKT_BURST); + + if (nb_rx == 0) + continue; + + if (copy_mode == COPY_MODE_IOAT_NUM) { + /* Perform packet hardware copy */ + } else { + /* Perform packet software copy, free source packets */ + int ret; + struct rte_mbuf *pkts_burst_copy[MAX_PKT_BURST]; + + ret = rte_mempool_get_bulk(ioat_pktmbuf_pool, + (void *)pkts_burst_copy, nb_rx); + + if (unlikely(ret < 0)) + rte_exit(EXIT_FAILURE, + "Unable to allocate memory.\n"); + + for (j = 0; j < nb_rx; j++) + pktmbuf_sw_copy(pkts_burst[j], + pkts_burst_copy[j]); + + rte_mempool_put_bulk(ioat_pktmbuf_pool, + (void *)pkts_burst, nb_rx); + + nb_enq = rte_ring_enqueue_burst( + rx_config->rx_to_tx_ring, + (void *)pkts_burst_copy, nb_rx, NULL); + + /* Free any not enqueued packets. */ + rte_mempool_put_bulk(ioat_pktmbuf_pool, + (void *)&pkts_burst_copy[nb_enq], + nb_rx - nb_enq); + } + } +} + +/* Transmit packets from IOAT rawdev/rte_ring for one port. */ +static void +ioat_tx_port(struct rxtx_port_config *tx_config) +{ + uint32_t i, j, nb_dq = 0; + struct rte_mbuf *mbufs_dst[MAX_PKT_BURST]; + + for (i = 0; i < tx_config->nb_queues; i++) { + if (copy_mode == COPY_MODE_IOAT_NUM) { + /* Deque the mbufs from IOAT device. */ + } else { + /* Deque the mbufs from rx_to_tx_ring. */ + nb_dq = rte_ring_dequeue_burst( + tx_config->rx_to_tx_ring, (void *)mbufs_dst, + MAX_PKT_BURST, NULL); + } + + if (nb_dq == 0) + return; + + /* Update macs if enabled */ + if (mac_updating) { + for (j = 0; j < nb_dq; j++) + update_mac_addrs(mbufs_dst[j], + tx_config->rxtx_port); + } + + const uint16_t nb_tx = rte_eth_tx_burst( + tx_config->rxtx_port, 0, + (void *)mbufs_dst, nb_dq); + + /* Free any unsent packets. */ + if (unlikely(nb_tx < nb_dq)) + rte_mempool_put_bulk(ioat_pktmbuf_pool, + (void *)&mbufs_dst[nb_tx], + nb_dq - nb_tx); + } +} + +/* Main rx and tx loop if only one slave lcore available */ +static void +rxtx_main_loop(void) +{ + uint16_t i; + uint16_t nb_ports = cfg.nb_ports; + + RTE_LOG(INFO, IOAT, "Entering main rx and tx loop for copy on" + " lcore %u\n", rte_lcore_id()); + + while (!force_quit) + for (i = 0; i < nb_ports; i++) { + ioat_rx_port(&cfg.ports[i]); + ioat_tx_port(&cfg.ports[i]); + } +} + +static void start_forwarding_cores(void) +{ + uint32_t lcore_id = rte_lcore_id(); + + RTE_LOG(INFO, IOAT, "Entering %s on lcore %u\n", + __func__, rte_lcore_id()); + + lcore_id = rte_get_next_lcore(lcore_id, true, true); + rte_eal_remote_launch((lcore_function_t *)rxtx_main_loop, + NULL, lcore_id); +} + /* Display usage */ static void ioat_usage(const char *prgname) @@ -253,6 +401,26 @@ check_link_status(uint32_t port_mask) return retval; } +static void +assign_rings(void) +{ + uint32_t i; + + for (i = 0; i < cfg.nb_ports; i++) { + char ring_name[RTE_RING_NAMESIZE]; + + snprintf(ring_name, sizeof(ring_name), "rx_to_tx_ring_%u", i); + /* Create ring for inter core communication */ + cfg.ports[i].rx_to_tx_ring = rte_ring_create( + ring_name, ring_size, + rte_socket_id(), RING_F_SP_ENQ | RING_F_SC_DEQ); + + if (cfg.ports[i].rx_to_tx_ring == NULL) + rte_exit(EXIT_FAILURE, "Ring create failed: %s\n", + rte_strerror(rte_errno)); + } +} + /* * Initializes a given port using global settings and with the RX buffers * coming from the mbuf_pool passed as a parameter. @@ -428,10 +596,19 @@ main(int argc, char **argv) if (cfg.nb_lcores < 1) rte_exit(EXIT_FAILURE, "There should be at least one slave lcore.\n"); + + assign_rings(); + + start_forwarding_cores(); + + /* force_quit is true when we get here */ + rte_eal_mp_wait_lcore(); + for (i = 0; i < cfg.nb_ports; i++) { printf("Closing port %d\n", cfg.ports[i].rxtx_port); rte_eth_dev_stop(cfg.ports[i].rxtx_port); rte_eth_dev_close(cfg.ports[i].rxtx_port); + rte_ring_free(cfg.ports[i].rx_to_tx_ring); } printf("Bye...\n");