flow_switch_control_pipe_sample.c

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/*
 * Copyright (c) 2023 NVIDIA CORPORATION AND AFFILIATES.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
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 *       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.
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 *       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
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#include <string.h>
#include <unistd.h>
 
#include <rte_byteorder.h>
 
#include <doca_flow.h>
#include <doca_log.h>
 
#include "flow_common.h"
#include "flow_switch_common.h"
 
DOCA_LOG_REGISTER(FLOW_SWITCH_CONTROL_PIPE);
 
#define NB_ENTRIES 2 /* number of entries in the created control pipe */
 
static struct doca_flow_pipe_entry *entries[NB_ENTRIES]; /* array for storing created entries */
 
/*
 * Create DOCA Flow control pipe
 *
 * @port [in]: port of the pipe
 * @pipe [out]: created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_control_pipe(struct doca_flow_port *port, struct doca_flow_pipe **pipe)
{
    struct doca_flow_pipe_cfg *pipe_cfg;
    doca_error_t result;
 
    result = doca_flow_pipe_cfg_create(&pipe_cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(pipe_cfg, "CONTROL_PIPE", DOCA_FLOW_PIPE_CONTROL, true);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    result = doca_flow_pipe_create(pipe_cfg, NULL, NULL, pipe);
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(pipe_cfg);
    return result;
}
 
/*
 * Add DOCA Flow pipe entries to the control pipe
 *
 * @control_pipe [in]: pipe of the entry
 * @status [in]: user context for adding entry
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t add_control_pipe_entries(struct doca_flow_pipe *control_pipe, struct entries_status *status)
{
    struct doca_flow_match match;
    struct doca_flow_monitor monitor;
    struct doca_flow_fwd fwd;
    uint8_t priority = 0;
    int entry_index = 0;
    doca_error_t result;
 
    for (entry_index = 0; entry_index < NB_ENTRIES; entry_index++) {
        memset(&match, 0, sizeof(match));
        memset(&monitor, 0, sizeof(monitor));
        memset(&fwd, 0, sizeof(fwd));
 
        monitor.counter_type = DOCA_FLOW_RESOURCE_TYPE_NON_SHARED;
 
        match.parser_meta.outer_l3_type = DOCA_FLOW_L3_META_IPV4;
        match.outer.l4_type_ext = DOCA_FLOW_L4_TYPE_EXT_TRANSPORT;
        match.outer.transport.src_port = rte_cpu_to_be_16(1234 + entry_index);
        match.outer.transport.dst_port = rte_cpu_to_be_16(80);
 
        fwd.type = DOCA_FLOW_FWD_PORT;
        fwd.port_id = entry_index + 1; /* The port to forward to is defined based on the entry index */
 
        result = doca_flow_pipe_control_add_entry(0,
                              priority,
                              control_pipe,
                              &match,
                              NULL,
                              NULL,
                              NULL,
                              NULL,
                              NULL,
                              &monitor,
                              &fwd,
                              status,
                              &entries[entry_index]);
 
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to add control pipe entry: %s", doca_error_get_descr(result));
            return result;
        }
    }
 
    return DOCA_SUCCESS;
}
 
/*
 * Run flow_switch_control_pipe sample
 *
 * @nb_queues [in]: number of queues the sample will use
 * @ctx [in]: flow switch context the sample will use
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
doca_error_t flow_switch_control_pipe(int nb_queues, struct flow_switch_ctx *ctx)
{
    int nb_ports = 3;
    struct flow_resources resource = {0};
    uint32_t nr_shared_resources[SHARED_RESOURCE_NUM_VALUES] = {0};
    struct doca_flow_port *ports[nb_ports];
    struct doca_dev *dev_arr[nb_ports];
    uint32_t actions_mem_size[nb_ports];
    struct doca_flow_port *switch_port;
    struct doca_flow_pipe *control_pipe;
    struct doca_flow_resource_query query_stats;
    struct entries_status status;
    int num_of_entries = 2;
    doca_error_t result;
    int entry_idx;
 
    memset(&status, 0, sizeof(status));
    resource.nr_counters = NB_ENTRIES; /* counter per entry */
 
    result = init_doca_flow(nb_queues, "switch,hws", &resource, nr_shared_resources);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA Flow: %s", doca_error_get_descr(result));
        return result;
    }
 
    memset(dev_arr, 0, sizeof(struct doca_dev *) * nb_ports);
    dev_arr[0] = ctx->doca_dev[0];
    ARRAY_INIT(actions_mem_size, ACTIONS_MEM_SIZE(nb_queues, num_of_entries));
    result = init_doca_flow_ports(nb_ports, ports, false, dev_arr, actions_mem_size);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA ports: %s", doca_error_get_descr(result));
        doca_flow_destroy();
        return result;
    }
 
    switch_port = doca_flow_port_switch_get(NULL);
 
    result = create_control_pipe(switch_port, &control_pipe);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create control pipe: %s", doca_error_get_descr(result));
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return result;
    }
 
    result = add_control_pipe_entries(control_pipe, &status);
    if (result != DOCA_SUCCESS) {
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return result;
    }
 
    result = doca_flow_entries_process(switch_port, 0, DEFAULT_TIMEOUT_US, num_of_entries);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to process entries: %s", doca_error_get_descr(result));
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return result;
    }
 
    if (status.nb_processed != num_of_entries || status.failure) {
        DOCA_LOG_ERR("Failed to process entries");
        stop_doca_flow_ports(nb_ports, ports);
        doca_flow_destroy();
        return DOCA_ERROR_BAD_STATE;
    }
 
    DOCA_LOG_INFO("Wait few seconds for packets to arrive");
    sleep(15);
 
    /* dump entries counters */
    for (entry_idx = 0; entry_idx < NB_ENTRIES; entry_idx++) {
        result = doca_flow_resource_query_entry(entries[entry_idx], &query_stats);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to query entry: %s", doca_error_get_descr(result));
            stop_doca_flow_ports(nb_ports, ports);
            doca_flow_destroy();
            return result;
        }
        DOCA_LOG_INFO("Entry in index: %d", entry_idx);
        DOCA_LOG_INFO("Total bytes: %ld", query_stats.counter.total_bytes);
        DOCA_LOG_INFO("Total packets: %ld", query_stats.counter.total_pkts);
    }
 
    result = stop_doca_flow_ports(nb_ports, ports);
    doca_flow_destroy();
    return result;
}