examples/ip_pipeline/config_parse_tm.c

/*-
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 *
 *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
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 *   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.
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 *       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
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 *   (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 <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <getopt.h>
#include <errno.h>
#include <stdarg.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>

#include <rte_errno.h>
#include <rte_cfgfile.h>
#include <rte_string_fns.h>

#include "app.h"

static int
tm_cfgfile_load_sched_port(
    struct rte_cfgfile *file,
    struct rte_sched_port_params *port_params)
{
    const char *entry;
    int j;

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

    entry = rte_cfgfile_get_entry(file, "port", "mtu");
    if (entry)
        port_params->mtu = (uint32_t)atoi(entry);

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

    entry = rte_cfgfile_get_entry(file,
        "port",
        "number of pipes per subport");
    if (entry)
        port_params->n_pipes_per_subport = (uint32_t) atoi(entry);

    entry = rte_cfgfile_get_entry(file, "port", "queue sizes");
    if (entry) {
        char *next;

        for (j = 0; j < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; j++) {
            port_params->qsize[j] = (uint16_t)
                strtol(entry, &next, 10);
            if (next == NULL)
                break;
            entry = next;
        }
    }

#ifdef RTE_SCHED_RED
    for (j = 0; j < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; j++) {
        char str[32];

        /* Parse WRED min thresholds */
        snprintf(str, sizeof(str), "tc %" PRId32 " wred min", j);
        entry = rte_cfgfile_get_entry(file, "red", str);
        if (entry) {
            char *next;
            int k;

            /* for each packet colour (green, yellow, red) */
            for (k = 0; k < e_RTE_METER_COLORS; k++) {
                port_params->red_params[j][k].min_th
                    = (uint16_t)strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }
        }

        /* Parse WRED max thresholds */
        snprintf(str, sizeof(str), "tc %" PRId32 " wred max", j);
        entry = rte_cfgfile_get_entry(file, "red", str);
        if (entry) {
            char *next;
            int k;

            /* for each packet colour (green, yellow, red) */
            for (k = 0; k < e_RTE_METER_COLORS; k++) {
                port_params->red_params[j][k].max_th
                    = (uint16_t)strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }
        }

        /* Parse WRED inverse mark probabilities */
        snprintf(str, sizeof(str), "tc %" PRId32 " wred inv prob", j);
        entry = rte_cfgfile_get_entry(file, "red", str);
        if (entry) {
            char *next;
            int k;

            /* for each packet colour (green, yellow, red) */
            for (k = 0; k < e_RTE_METER_COLORS; k++) {
                port_params->red_params[j][k].maxp_inv
                    = (uint8_t)strtol(entry, &next, 10);

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

        /* Parse WRED EWMA filter weights */
        snprintf(str, sizeof(str), "tc %" PRId32 " wred weight", j);
        entry = rte_cfgfile_get_entry(file, "red", str);
        if (entry) {
            char *next;
            int k;

            /* for each packet colour (green, yellow, red) */
            for (k = 0; k < e_RTE_METER_COLORS; k++) {
                port_params->red_params[j][k].wq_log2
                    = (uint8_t)strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }
        }
    }
#endif /* RTE_SCHED_RED */

    return 0;
}

static int
tm_cfgfile_load_sched_pipe(
    struct rte_cfgfile *file,
    struct rte_sched_port_params *port_params,
    struct rte_sched_pipe_params *pipe_params)
{
    int i, j;
    char *next;
    const char *entry;
    int profiles;

    profiles = rte_cfgfile_num_sections(file,
        "pipe profile", sizeof("pipe profile") - 1);
    port_params->n_pipe_profiles = profiles;

    for (j = 0; j < profiles; j++) {
        char pipe_name[32];

        snprintf(pipe_name, sizeof(pipe_name),
            "pipe profile %" PRId32, j);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tb rate");
        if (entry)
            pipe_params[j].tb_rate = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tb size");
        if (entry)
            pipe_params[j].tb_size = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc period");
        if (entry)
            pipe_params[j].tc_period = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 0 rate");
        if (entry)
            pipe_params[j].tc_rate[0] = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 1 rate");
        if (entry)
            pipe_params[j].tc_rate[1] = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 2 rate");
        if (entry)
            pipe_params[j].tc_rate[2] = (uint32_t) atoi(entry);

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 3 rate");
        if (entry)
            pipe_params[j].tc_rate[3] = (uint32_t) atoi(entry);

#ifdef RTE_SCHED_SUBPORT_TC_OV
        entry = rte_cfgfile_get_entry(file, pipe_name,
            "tc 3 oversubscription weight");
        if (entry)
            pipe_params[j].tc_ov_weight = (uint8_t)atoi(entry);
#endif

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

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 1 wrr weights");
        if (entry)
            for (i = 0; i < RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS; i++) {
                pipe_params[j].wrr_weights[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE*1 + i] =
                    (uint8_t) strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 2 wrr weights");
        if (entry)
            for (i = 0; i < RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS; i++) {
                pipe_params[j].wrr_weights[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE*2 + i] =
                    (uint8_t) strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }

        entry = rte_cfgfile_get_entry(file, pipe_name, "tc 3 wrr weights");
        if (entry)
            for (i = 0; i < RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS; i++) {
                pipe_params[j].wrr_weights[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE*3 + i] =
                    (uint8_t) strtol(entry, &next, 10);
                if (next == NULL)
                    break;
                entry = next;
            }
    }
    return 0;
}

static int
tm_cfgfile_load_sched_subport(
    struct rte_cfgfile *file,
    struct rte_sched_subport_params *subport_params,
    int *pipe_to_profile)
{
    const char *entry;
    int i, j, k;

    for (i = 0; i < APP_MAX_SCHED_SUBPORTS; i++) {
        char sec_name[CFG_NAME_LEN];

        snprintf(sec_name, sizeof(sec_name),
            "subport %" PRId32, i);

        if (rte_cfgfile_has_section(file, sec_name)) {
            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tb rate");
            if (entry)
                subport_params[i].tb_rate =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tb size");
            if (entry)
                subport_params[i].tb_size =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tc period");
            if (entry)
                subport_params[i].tc_period =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tc 0 rate");
            if (entry)
                subport_params[i].tc_rate[0] =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tc 1 rate");
            if (entry)
                subport_params[i].tc_rate[1] =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tc 2 rate");
            if (entry)
                subport_params[i].tc_rate[2] =
                    (uint32_t) atoi(entry);

            entry = rte_cfgfile_get_entry(file,
                sec_name,
                "tc 3 rate");
            if (entry)
                subport_params[i].tc_rate[3] =
                    (uint32_t) atoi(entry);

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

            rte_cfgfile_section_entries(file,
                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;
                    char name[CFG_NAME_LEN + 1];

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

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

                    if ((end >= APP_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 %" PRId32,
                            profile);
                        if (rte_cfgfile_has_section(file, profile_name))
                            pipe_to_profile[i * APP_MAX_SCHED_PIPES + k] = profile;
                        else
                            rte_exit(EXIT_FAILURE,
                                "Wrong pipe profile %s\n",
                                entries[j].value);
                    }
                }
        }
    }

    return 0;
}

static int
tm_cfgfile_load(struct app_pktq_tm_params *tm)
{
    struct rte_cfgfile *file;
    uint32_t i;

    memset(tm->sched_subport_params, 0, sizeof(tm->sched_subport_params));
    memset(tm->sched_pipe_profiles, 0, sizeof(tm->sched_pipe_profiles));
    memset(&tm->sched_port_params, 0, sizeof(tm->sched_port_params));
    for (i = 0; i < APP_MAX_SCHED_SUBPORTS * APP_MAX_SCHED_PIPES; i++)
        tm->sched_pipe_to_profile[i] = -1;

    tm->sched_port_params.pipe_profiles = &tm->sched_pipe_profiles[0];

    if (tm->file_name[0] == '\0')
        return -1;

    file = rte_cfgfile_load(tm->file_name, 0);
    if (file == NULL)
        return -1;

    tm_cfgfile_load_sched_port(file,
        &tm->sched_port_params);
    tm_cfgfile_load_sched_subport(file,
        tm->sched_subport_params,
        tm->sched_pipe_to_profile);
    tm_cfgfile_load_sched_pipe(file,
        &tm->sched_port_params,
        tm->sched_pipe_profiles);

    rte_cfgfile_close(file);
    return 0;
}

int
app_config_parse_tm(struct app_params *app)
{
    uint32_t i;

    for (i = 0; i < RTE_DIM(app->tm_params); i++) {
        struct app_pktq_tm_params *p = &app->tm_params[i];
        int status;

        if (!APP_PARAM_VALID(p))
            break;

        status = tm_cfgfile_load(p);
        APP_CHECK(status == 0,
            "Parse error for %s configuration file \"%s\"\n",
            p->name,
            p->file_name);
    }

    return 0;
}