examples/qos_sched/cfg_file.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <rte_string_fns.h>
#include <rte_sched.h>

#include "cfg_file.h"
#include "main.h"


#define CFG_ALLOC_SECTION_BATCH 8

#define CFG_ALLOC_ENTRY_BATCH 16

uint32_t active_queues[RTE_SCHED_QUEUES_PER_PIPE];
uint32_t n_active_queues;

struct rte_sched_cman_params cman_params;

int parse_u64(const char *entry, uint64_t *val)
{
    char *endptr;
    if (!entry || !val)
        return -EINVAL;

    errno = 0;

    *val = strtoull(entry, &endptr, 0);
    if (errno == EINVAL || errno == ERANGE || *endptr != '\0')
        return -EINVAL;

    return 0;
}

int
cfg_load_port(struct rte_cfgfile *cfg, struct rte_sched_port_params *port_params)
{
    const char *entry;

    if (!cfg || !port_params)
        return -1;

    entry = rte_cfgfile_get_entry(cfg, "port", "frame overhead");
    if (entry)
        port_params->frame_overhead = (uint32_t)atoi(entry);

    entry = rte_cfgfile_get_entry(cfg, "port", "number of subports per port");
    if (entry)
        port_params->n_subports_per_port = (uint32_t)atoi(entry);

    return 0;
}

int
cfg_load_pipe(struct rte_cfgfile *cfg, struct rte_sched_pipe_params *pipe_params)
{
    int i, j, ret = 0;
    char *next;
    const char *entry;
    int profiles;

    if (!cfg || !pipe_params)
        return -1;

    profiles = rte_cfgfile_num_sections(cfg, "pipe profile", sizeof("pipe profile") - 1);
    subport_params[0].n_pipe_profiles = profiles;

    for (j = 0; j < profiles; j++) {
        char pipe_name[32];
        snprintf(pipe_name, sizeof(pipe_name), "pipe profile %d", j);

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tb rate");
        ret = parse_u64(entry, &pipe_params[j].tb_rate);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tb size");
        ret = parse_u64(entry, &pipe_params[j].tb_size);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc period");
        ret = parse_u64(entry, &pipe_params[j].tc_period);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 0 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[0]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 1 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[1]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 2 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[2]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 3 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[3]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 4 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[4]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 5 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[5]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 6 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[6]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 7 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[7]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 8 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[8]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 9 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[9]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 10 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[10]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 11 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[11]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 12 rate");
        ret = parse_u64(entry, &pipe_params[j].tc_rate[12]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 12 oversubscription weight");
        if (entry)
            pipe_params[j].tc_ov_weight = (uint8_t)atoi(entry);

        entry = rte_cfgfile_get_entry(cfg, pipe_name, "tc 12 wrr weights");
        if (entry) {
            for (i = 0; i < RTE_SCHED_BE_QUEUES_PER_PIPE; i++) {
                pipe_params[j].wrr_weights[i] =
                    (uint8_t)strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }
        }
    }
    return 0;
}

int
cfg_load_subport_profile(struct rte_cfgfile *cfg,
    struct rte_sched_subport_profile_params *subport_profile)
{
    int i, ret = 0;
    const char *entry;
    int profiles;

    if (!cfg || !subport_profile)
        return -1;

    profiles = rte_cfgfile_num_sections(cfg, "subport profile",
                       sizeof("subport profile") - 1);
    port_params.n_subport_profiles = profiles;

    for (i = 0; i < profiles; i++) {
        char sec_name[32];
        snprintf(sec_name, sizeof(sec_name), "subport profile %d", i);

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tb rate");
        ret = parse_u64(entry, &subport_profile[i].tb_rate);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tb size");
        ret = parse_u64(entry, &subport_profile[i].tb_size);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc period");
        ret = parse_u64(entry, &subport_profile[i].tc_period);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 0 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[0]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 1 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[1]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 2 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[2]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 3 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[3]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 4 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[4]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 5 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[5]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 6 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[6]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 7 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[7]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 8 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[8]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 9 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[9]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 10 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[10]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 11 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[11]);
        if (ret)
            return ret;

        entry = rte_cfgfile_get_entry(cfg, sec_name, "tc 12 rate");
        ret = parse_u64(entry, &subport_profile[i].tc_rate[12]);
        if (ret)
            return ret;
    }

    return 0;
}

int
cfg_load_subport(struct rte_cfgfile *cfg, struct rte_sched_subport_params *subport_params)
{
    bool cman_enabled = false;
    const char *entry;
    int i, j, k;

    if (!cfg || !subport_params)
        return -1;

    memset(app_pipe_to_profile, -1, sizeof(app_pipe_to_profile));
    memset(active_queues, 0, sizeof(active_queues));
    n_active_queues = 0;

    if (rte_cfgfile_has_section(cfg, "red")) {
        cman_params.cman_mode = RTE_SCHED_CMAN_RED;
        cman_enabled = true;

        for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
            char str[32];

            /* Parse RED min thresholds */
            snprintf(str, sizeof(str), "tc %d red min", i);
            entry = rte_cfgfile_get_entry(cfg, "red", str);
            if (entry) {
                char *next;
                /* for each packet colour (green, yellow, red) */
                for (j = 0; j < RTE_COLORS; j++) {
                    cman_params.red_params[i][j].min_th
                        = (uint16_t)strtol(entry, &next, 10);
                    if (next == NULL)
                        break;
                    entry = next;
                }
            }

            /* Parse RED max thresholds */
            snprintf(str, sizeof(str), "tc %d red max", i);
            entry = rte_cfgfile_get_entry(cfg, "red", str);
            if (entry) {
                char *next;
                /* for each packet colour (green, yellow, red) */
                for (j = 0; j < RTE_COLORS; j++) {
                    cman_params.red_params[i][j].max_th
                        = (uint16_t)strtol(entry, &next, 10);
                    if (next == NULL)
                        break;
                    entry = next;
                }
            }

            /* Parse RED inverse mark probabilities */
            snprintf(str, sizeof(str), "tc %d red inv prob", i);
            entry = rte_cfgfile_get_entry(cfg, "red", str);
            if (entry) {
                char *next;
                /* for each packet colour (green, yellow, red) */
                for (j = 0; j < RTE_COLORS; j++) {
                    cman_params.red_params[i][j].maxp_inv
                        = (uint8_t)strtol(entry, &next, 10);

                    if (next == NULL)
                        break;
                    entry = next;
                }
            }

            /* Parse RED EWMA filter weights */
            snprintf(str, sizeof(str), "tc %d red weight", i);
            entry = rte_cfgfile_get_entry(cfg, "red", str);
            if (entry) {
                char *next;
                /* for each packet colour (green, yellow, red) */
                for (j = 0; j < RTE_COLORS; j++) {
                    cman_params.red_params[i][j].wq_log2
                        = (uint8_t)strtol(entry, &next, 10);
                    if (next == NULL)
                        break;
                    entry = next;
                }
            }
        }
    }

    if (rte_cfgfile_has_section(cfg, "pie")) {
        cman_params.cman_mode = RTE_SCHED_CMAN_PIE;
        cman_enabled = true;

        for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
            char str[32];

            /* Parse Queue Delay Ref value */
            snprintf(str, sizeof(str), "tc %d qdelay ref", i);
            entry = rte_cfgfile_get_entry(cfg, "pie", str);
            if (entry)
                cman_params.pie_params[i].qdelay_ref =
                    (uint16_t) atoi(entry);

            /* Parse Max Burst value */
            snprintf(str, sizeof(str), "tc %d max burst", i);
            entry = rte_cfgfile_get_entry(cfg, "pie", str);
            if (entry)
                cman_params.pie_params[i].max_burst =
                    (uint16_t) atoi(entry);

            /* Parse Update Interval Value */
            snprintf(str, sizeof(str), "tc %d update interval", i);
            entry = rte_cfgfile_get_entry(cfg, "pie", str);
            if (entry)
                cman_params.pie_params[i].dp_update_interval =
                    (uint16_t) atoi(entry);

            /* Parse Tailq Threshold Value */
            snprintf(str, sizeof(str), "tc %d tailq th", i);
            entry = rte_cfgfile_get_entry(cfg, "pie", str);
            if (entry)
                cman_params.pie_params[i].tailq_th =
                    (uint16_t) atoi(entry);

        }
    }

    for (i = 0; i < MAX_SCHED_SUBPORTS; i++) {
        char sec_name[CFG_NAME_LEN];
        snprintf(sec_name, sizeof(sec_name), "subport %d", i);

        if (rte_cfgfile_has_section(cfg, sec_name)) {
            entry = rte_cfgfile_get_entry(cfg, sec_name,
                "number of pipes per subport");
            if (entry)
                subport_params[i].n_pipes_per_subport_enabled =
                    (uint32_t)atoi(entry);

            entry = rte_cfgfile_get_entry(cfg, sec_name, "queue sizes");
            if (entry) {
                char *next;

                for (j = 0; j < RTE_SCHED_TRAFFIC_CLASS_BE; j++) {
                    subport_params[i].qsize[j] =
                        (uint16_t)strtol(entry, &next, 10);
                    if (subport_params[i].qsize[j] != 0) {
                        active_queues[n_active_queues] = j;
                        n_active_queues++;
                    }
                    if (next == NULL)
                        break;
                    entry = next;
                }

                subport_params[i].qsize[RTE_SCHED_TRAFFIC_CLASS_BE] =
                    (uint16_t)strtol(entry, &next, 10);

                for (j = 0; j < RTE_SCHED_BE_QUEUES_PER_PIPE; j++) {
                    active_queues[n_active_queues] =
                        RTE_SCHED_TRAFFIC_CLASS_BE + j;
                    n_active_queues++;
                }
            }

            int n_entries = rte_cfgfile_section_num_entries(cfg, sec_name);
            struct rte_cfgfile_entry entries[n_entries];

            rte_cfgfile_section_entries(cfg, sec_name, entries, n_entries);

            for (j = 0; j < n_entries; j++) {
                if (strncmp("pipe", entries[j].name, sizeof("pipe") - 1) == 0) {
                    int profile;
                    char *tokens[2] = {NULL, NULL};
                    int n_tokens;
                    int begin, end;

                    profile = atoi(entries[j].value);
                    n_tokens = rte_strsplit(&entries[j].name[sizeof("pipe")],
                            strnlen(entries[j].name, CFG_NAME_LEN), tokens, 2, '-');

                    begin =  atoi(tokens[0]);
                    if (n_tokens == 2)
                        end = atoi(tokens[1]);
                    else
                        end = begin;

                    if (end >= MAX_SCHED_PIPES || begin > end)
                        return -1;

                    for (k = begin; k <= end; k++) {
                        char profile_name[CFG_NAME_LEN];

                        snprintf(profile_name, sizeof(profile_name),
                                "pipe profile %d", profile);
                        if (rte_cfgfile_has_section(cfg, profile_name))
                            app_pipe_to_profile[i][k] = profile;
                        else
                            rte_exit(EXIT_FAILURE, "Wrong pipe profile %s\n",
                                    entries[j].value);

                    }
                }
            }
            if (cman_enabled)
                subport_params[i].cman_params = &cman_params;
        }
    }

    return 0;
}