examples/qos_sched/cfg_file.c

/*-
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 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
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 *   modification, are permitted provided that the following conditions
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 *
 *     * 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
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 *   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 <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

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

    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);

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

    entry = rte_cfgfile_get_entry(cfg, "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 %d wred min", j);
        entry = rte_cfgfile_get_entry(cfg, "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 %d wred max", j);
        entry = rte_cfgfile_get_entry(cfg, "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 %d wred inv prob", j);
        entry = rte_cfgfile_get_entry(cfg, "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 %d wred weight", j);
        entry = rte_cfgfile_get_entry(cfg, "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;
}

int
cfg_load_pipe(struct rte_cfgfile *cfg, struct rte_sched_pipe_params *pipe_params)
{
    int i, j;
    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);
    port_params.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");
        if (entry)
            pipe_params[j].tb_rate = (uint32_t)atoi(entry);

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

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

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

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

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

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

        entry = rte_cfgfile_get_entry(cfg, 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(cfg, 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(cfg, 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(cfg, 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;
}

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

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

    memset(app_pipe_to_profile, -1, sizeof(app_pipe_to_profile));

    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, "tb rate");
            if (entry)
                subport_params[i].tb_rate = (uint32_t)atoi(entry);

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

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

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

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

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

            entry = rte_cfgfile_get_entry(cfg, 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(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);

                    }
                }
            }
        }
    }

    return 0;
}