ceph/src/seastar/dpdk/drivers/net/sfc/sfc_kvargs.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  * Copyright (c) 2016-2017 Solarflare Communications Inc.
   5  * All rights reserved.
   6  *
   7  * This software was jointly developed between OKTET Labs (under contract
   8  * for Solarflare) and Solarflare Communications, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright notice,
  14  *    this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright notice,
  16  *    this list of conditions and the following disclaimer in the documentation
  17  *    and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  29  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <stdbool.h>
  33 #include <strings.h>
  34
  35 #include <rte_devargs.h>
  36 #include <rte_kvargs.h>
  37
  38 #include "sfc.h"
  39 #include "sfc_kvargs.h"
  40
  41 int
  42 sfc_kvargs_parse(struct sfc_adapter *sa)
  43 {
  44         struct rte_eth_dev *eth_dev = (sa)->eth_dev;
  45         struct rte_devargs *devargs = eth_dev->device->devargs;
  46         const char **params = (const char *[]){
  47                 SFC_KVARG_STATS_UPDATE_PERIOD_MS,
  48                 SFC_KVARG_DEBUG_INIT,
  49                 SFC_KVARG_MCDI_LOGGING,
  50                 SFC_KVARG_PERF_PROFILE,
  51                 SFC_KVARG_RX_DATAPATH,
  52                 SFC_KVARG_TX_DATAPATH,
  53                 NULL,
  54         };
  55
  56         if (devargs == NULL)
  57                 return 0;
  58
  59         sa->kvargs = rte_kvargs_parse(devargs->args, params);
  60         if (sa->kvargs == NULL)
  61                 return EINVAL;
  62
  63         return 0;
  64 }
  65
  66 void
  67 sfc_kvargs_cleanup(struct sfc_adapter *sa)
  68 {
  69         rte_kvargs_free(sa->kvargs);
  70 }
  71
  72 static int
  73 sfc_kvarg_match_value(const char *value, const char * const *values,
  74                       unsigned int n_values)
  75 {
  76         unsigned int i;
  77
  78         for (i = 0; i < n_values; ++i)
  79                 if (strcasecmp(value, values[i]) == 0)
  80                         return 1;
  81
  82         return 0;
  83 }
  84
  85 int
  86 sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
  87                    arg_handler_t handler, void *opaque_arg)
  88 {
  89         if (sa->kvargs == NULL)
  90                 return 0;
  91
  92         return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
  93 }
  94
  95 int
  96 sfc_kvarg_bool_handler(__rte_unused const char *key,
  97                        const char *value_str, void *opaque)
  98 {
  99         const char * const true_strs[] = {
 100                 "1", "y", "yes", "on", "true"
 101         };
 102         const char * const false_strs[] = {
 103                 "0", "n", "no", "off", "false"
 104         };
 105         bool *value = opaque;
 106
 107         if (sfc_kvarg_match_value(value_str, true_strs,
 108                                   RTE_DIM(true_strs)))
 109                 *value = true;
 110         else if (sfc_kvarg_match_value(value_str, false_strs,
 111                                        RTE_DIM(false_strs)))
 112                 *value = false;
 113         else
 114                 return -EINVAL;
 115
 116         return 0;
 117 }
 118
 119 int
 120 sfc_kvarg_long_handler(__rte_unused const char *key,
 121                        const char *value_str, void *opaque)
 122 {
 123         long value;
 124         char *endptr;
 125
 126         if (!value_str || !opaque)
 127                 return -EINVAL;
 128
 129         value = strtol(value_str, &endptr, 0);
 130         if (endptr == value_str)
 131                 return -EINVAL;
 132
 133         *(long *)opaque = value;
 134
 135         return 0;
 136 }
 137
 138 int
 139 sfc_kvarg_string_handler(__rte_unused const char *key,
 140                          const char *value_str, void *opaque)
 141 {
 142         *(const char **)opaque = value_str;
 143
 144         return 0;
 145 }