drivers/net/sfc/sfc_kvargs.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright(c) 2019-2021 Xilinx, Inc.
   4  * Copyright(c) 2016-2019 Solarflare Communications Inc.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 #include <stdbool.h>
  11 #include <strings.h>
  12
  13 #include <rte_devargs.h>
  14 #include <rte_kvargs.h>
  15
  16 #include "sfc.h"
  17 #include "sfc_kvargs.h"
  18
  19 int
  20 sfc_kvargs_parse(struct sfc_adapter *sa)
  21 {
  22         struct rte_eth_dev *eth_dev = (sa)->eth_dev;
  23         struct rte_devargs *devargs = eth_dev->device->devargs;
  24         const char **params = (const char *[]){
  25                 SFC_KVARG_SWITCH_MODE,
  26                 SFC_KVARG_STATS_UPDATE_PERIOD_MS,
  27                 SFC_KVARG_PERF_PROFILE,
  28                 SFC_KVARG_RX_DATAPATH,
  29                 SFC_KVARG_TX_DATAPATH,
  30                 SFC_KVARG_FW_VARIANT,
  31                 SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
  32                 RTE_DEVARGS_KEY_CLASS,
  33                 NULL,
  34         };
  35
  36         if (devargs == NULL)
  37                 return 0;
  38
  39         sa->kvargs = rte_kvargs_parse(devargs->args, params);
  40         if (sa->kvargs == NULL)
  41                 return EINVAL;
  42
  43         return 0;
  44 }
  45
  46 void
  47 sfc_kvargs_cleanup(struct sfc_adapter *sa)
  48 {
  49         rte_kvargs_free(sa->kvargs);
  50 }
  51
  52 static int
  53 sfc_kvarg_match_value(const char *value, const char * const *values,
  54                       unsigned int n_values)
  55 {
  56         unsigned int i;
  57
  58         for (i = 0; i < n_values; ++i)
  59                 if (strcasecmp(value, values[i]) == 0)
  60                         return 1;
  61
  62         return 0;
  63 }
  64
  65 int
  66 sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
  67                    arg_handler_t handler, void *opaque_arg)
  68 {
  69         if (sa->kvargs == NULL)
  70                 return 0;
  71
  72         return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
  73 }
  74
  75 int
  76 sfc_kvarg_bool_handler(__rte_unused const char *key,
  77                        const char *value_str, void *opaque)
  78 {
  79         const char * const true_strs[] = {
  80                 "1", "y", "yes", "on", "true"
  81         };
  82         const char * const false_strs[] = {
  83                 "0", "n", "no", "off", "false"
  84         };
  85         bool *value = opaque;
  86
  87         if (sfc_kvarg_match_value(value_str, true_strs,
  88                                   RTE_DIM(true_strs)))
  89                 *value = true;
  90         else if (sfc_kvarg_match_value(value_str, false_strs,
  91                                        RTE_DIM(false_strs)))
  92                 *value = false;
  93         else
  94                 return -EINVAL;
  95
  96         return 0;
  97 }
  98
  99 int
 100 sfc_kvarg_long_handler(__rte_unused const char *key,
 101                        const char *value_str, void *opaque)
 102 {
 103         long value;
 104         char *endptr;
 105
 106         if (!value_str || !opaque)
 107                 return -EINVAL;
 108
 109         value = strtol(value_str, &endptr, 0);
 110         if (endptr == value_str)
 111                 return -EINVAL;
 112
 113         *(long *)opaque = value;
 114
 115         return 0;
 116 }
 117
 118 int
 119 sfc_kvarg_string_handler(__rte_unused const char *key,
 120                          const char *value_str, void *opaque)
 121 {
 122         *(const char **)opaque = value_str;
 123
 124         return 0;
 125 }