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Diffstat (limited to 'examples/quota_watermark/qw/main.c')
| -rw-r--r-- | examples/quota_watermark/qw/main.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/examples/quota_watermark/qw/main.c b/examples/quota_watermark/qw/main.c new file mode 100644 index 00000000..8ed02148 --- /dev/null +++ b/examples/quota_watermark/qw/main.c @@ -0,0 +1,372 @@ +/*- + * 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. + */ + +#include <rte_eal.h> + +#include <rte_common.h> +#include <rte_debug.h> +#include <rte_errno.h> +#include <rte_ethdev.h> +#include <rte_launch.h> +#include <rte_lcore.h> +#include <rte_log.h> +#include <rte_mbuf.h> +#include <rte_ring.h> + +#include <rte_byteorder.h> + +#include "args.h" +#include "main.h" +#include "init.h" +#include "../include/conf.h" + + +#ifdef QW_SOFTWARE_FC +#define SEND_PAUSE_FRAME(port_id, duration) send_pause_frame(port_id, duration) +#else +#define SEND_PAUSE_FRAME(port_id, duration) do { } while(0) +#endif + +#define ETHER_TYPE_FLOW_CONTROL 0x8808 + +struct ether_fc_frame { + uint16_t opcode; + uint16_t param; +} __attribute__((__packed__)); + + +int *quota; +unsigned int *low_watermark; + +uint8_t port_pairs[RTE_MAX_ETHPORTS]; + +struct rte_ring *rings[RTE_MAX_LCORE][RTE_MAX_ETHPORTS]; +struct rte_mempool *mbuf_pool; + + +static void send_pause_frame(uint8_t port_id, uint16_t duration) +{ + struct rte_mbuf *mbuf; + struct ether_fc_frame *pause_frame; + struct ether_hdr *hdr; + struct ether_addr mac_addr; + + RTE_LOG(DEBUG, USER1, "Sending PAUSE frame (duration=%d) on port %d\n", + duration, port_id); + + /* Get a mbuf from the pool */ + mbuf = rte_pktmbuf_alloc(mbuf_pool); + if (unlikely(mbuf == NULL)) + return; + + /* Prepare a PAUSE frame */ + hdr = rte_pktmbuf_mtod(mbuf, struct ether_hdr *); + pause_frame = (struct ether_fc_frame *) &hdr[1]; + + rte_eth_macaddr_get(port_id, &mac_addr); + ether_addr_copy(&mac_addr, &hdr->s_addr); + + void *tmp = &hdr->d_addr.addr_bytes[0]; + *((uint64_t *)tmp) = 0x010000C28001ULL; + + hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_FLOW_CONTROL); + + pause_frame->opcode = rte_cpu_to_be_16(0x0001); + pause_frame->param = rte_cpu_to_be_16(duration); + + mbuf->pkt_len = 60; + mbuf->data_len = 60; + + rte_eth_tx_burst(port_id, 0, &mbuf, 1); +} + +/** + * Get the previous enabled lcore ID + * + * @param lcore_id + * The current lcore ID. + * @return + * The previous enabled lcore_id or -1 if not found. + */ +static unsigned int +get_previous_lcore_id(unsigned int lcore_id) +{ + int i; + + for (i = lcore_id - 1; i >= 0; i--) + if (rte_lcore_is_enabled(i)) + return i; + + return -1; +} + +/** + * Get the last enabled lcore ID + * + * @return + * The last enabled lcore_id. + */ +static unsigned int +get_last_lcore_id(void) +{ + int i; + + for (i = RTE_MAX_LCORE; i >= 0; i--) + if (rte_lcore_is_enabled(i)) + return i; + + return 0; +} + +static void +receive_stage(__attribute__((unused)) void *args) +{ + int i, ret; + + uint8_t port_id; + uint16_t nb_rx_pkts; + + unsigned int lcore_id; + + struct rte_mbuf *pkts[MAX_PKT_QUOTA]; + struct rte_ring *ring; + enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY }; + + lcore_id = rte_lcore_id(); + + RTE_LOG(INFO, USER1, + "%s() started on core %u\n", __func__, lcore_id); + + while (1) { + + /* Process each port round robin style */ + for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) { + + if (!is_bit_set(port_id, portmask)) + continue; + + ring = rings[lcore_id][port_id]; + + if (ring_state[port_id] != RING_READY) { + if (rte_ring_count(ring) > *low_watermark) + continue; + else + ring_state[port_id] = RING_READY; + } + + /* Enqueue received packets on the RX ring */ + nb_rx_pkts = rte_eth_rx_burst(port_id, 0, pkts, (uint16_t) *quota); + ret = rte_ring_enqueue_bulk(ring, (void *) pkts, nb_rx_pkts); + if (ret == -EDQUOT) { + ring_state[port_id] = RING_OVERLOADED; + send_pause_frame(port_id, 1337); + } + + else if (ret == -ENOBUFS) { + + /* Return mbufs to the pool, effectively dropping packets */ + for (i = 0; i < nb_rx_pkts; i++) + rte_pktmbuf_free(pkts[i]); + } + } + } +} + +static void +pipeline_stage(__attribute__((unused)) void *args) +{ + int i, ret; + int nb_dq_pkts; + + uint8_t port_id; + + unsigned int lcore_id, previous_lcore_id; + + void *pkts[MAX_PKT_QUOTA]; + struct rte_ring *rx, *tx; + enum ring_state ring_state[RTE_MAX_ETHPORTS] = { RING_READY }; + + lcore_id = rte_lcore_id(); + previous_lcore_id = get_previous_lcore_id(lcore_id); + + RTE_LOG(INFO, USER1, + "%s() started on core %u - processing packets from core %u\n", + __func__, lcore_id, previous_lcore_id); + + while (1) { + + for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) { + + if (!is_bit_set(port_id, portmask)) + continue; + + tx = rings[lcore_id][port_id]; + rx = rings[previous_lcore_id][port_id]; + + if (ring_state[port_id] != RING_READY) { + if (rte_ring_count(tx) > *low_watermark) + continue; + else + ring_state[port_id] = RING_READY; + } + + /* Dequeue up to quota mbuf from rx */ + nb_dq_pkts = rte_ring_dequeue_burst(rx, pkts, *quota); + if (unlikely(nb_dq_pkts < 0)) + continue; + + /* Enqueue them on tx */ + ret = rte_ring_enqueue_bulk(tx, pkts, nb_dq_pkts); + if (ret == -EDQUOT) + ring_state[port_id] = RING_OVERLOADED; + + else if (ret == -ENOBUFS) { + + /* Return mbufs to the pool, effectively dropping packets */ + for (i = 0; i < nb_dq_pkts; i++) + rte_pktmbuf_free(pkts[i]); + } + } + } +} + +static void +send_stage(__attribute__((unused)) void *args) +{ + uint16_t nb_dq_pkts; + + uint8_t port_id; + uint8_t dest_port_id; + + unsigned int lcore_id, previous_lcore_id; + + struct rte_ring *tx; + struct rte_mbuf *tx_pkts[MAX_PKT_QUOTA]; + + lcore_id = rte_lcore_id(); + previous_lcore_id = get_previous_lcore_id(lcore_id); + + RTE_LOG(INFO, USER1, + "%s() started on core %u - processing packets from core %u\n", + __func__, lcore_id, previous_lcore_id); + + while (1) { + + /* Process each ring round robin style */ + for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) { + + if (!is_bit_set(port_id, portmask)) + continue; + + dest_port_id = port_pairs[port_id]; + tx = rings[previous_lcore_id][port_id]; + + if (rte_ring_empty(tx)) + continue; + + /* Dequeue packets from tx and send them */ + nb_dq_pkts = (uint16_t) rte_ring_dequeue_burst(tx, (void *) tx_pkts, *quota); + rte_eth_tx_burst(dest_port_id, 0, tx_pkts, nb_dq_pkts); + + /* TODO: Check if nb_dq_pkts == nb_tx_pkts? */ + } + } +} + +int +main(int argc, char **argv) +{ + int ret; + unsigned int lcore_id, master_lcore_id, last_lcore_id; + + uint8_t port_id; + + rte_set_log_level(RTE_LOG_INFO); + + ret = rte_eal_init(argc, argv); + if (ret < 0) + rte_exit(EXIT_FAILURE, "Cannot initialize EAL\n"); + + argc -= ret; + argv += ret; + + init_dpdk(); + setup_shared_variables(); + + *quota = 32; + *low_watermark = 60 * RING_SIZE / 100; + + last_lcore_id = get_last_lcore_id(); + master_lcore_id = rte_get_master_lcore(); + + /* Parse the application's arguments */ + ret = parse_qw_args(argc, argv); + if (ret < 0) + rte_exit(EXIT_FAILURE, "Invalid quota/watermark argument(s)\n"); + + /* Create a pool of mbuf to store packets */ + mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_PER_POOL, 32, 0, + MBUF_DATA_SIZE, rte_socket_id()); + if (mbuf_pool == NULL) + rte_panic("%s\n", rte_strerror(rte_errno)); + + for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) + if (is_bit_set(port_id, portmask)) { + configure_eth_port(port_id); + init_ring(master_lcore_id, port_id); + } + + pair_ports(); + + /* Start pipeline_connect() on all the available slave lcore but the last */ + for (lcore_id = 0 ; lcore_id < last_lcore_id; lcore_id++) { + if (rte_lcore_is_enabled(lcore_id) && lcore_id != master_lcore_id) { + + for (port_id = 0; port_id < RTE_MAX_ETHPORTS; port_id++) + if (is_bit_set(port_id, portmask)) + init_ring(lcore_id, port_id); + + /* typecast is a workaround for GCC 4.3 bug */ + rte_eal_remote_launch((int (*)(void *))pipeline_stage, NULL, lcore_id); + } + } + + /* Start send_stage() on the last slave core */ + /* typecast is a workaround for GCC 4.3 bug */ + rte_eal_remote_launch((int (*)(void *))send_stage, NULL, last_lcore_id); + + /* Start receive_stage() on the master core */ + receive_stage(NULL); + + return 0; +} |