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_REPRESENTOR,
  27                 SFC_KVARG_STATS_UPDATE_PERIOD_MS,
  28                 SFC_KVARG_PERF_PROFILE,
  29                 SFC_KVARG_RX_DATAPATH,
  30                 SFC_KVARG_TX_DATAPATH,
  31                 SFC_KVARG_FW_VARIANT,
  32                 SFC_KVARG_RXD_WAIT_TIMEOUT_NS,
  33                 RTE_DEVARGS_KEY_CLASS,
  34                 NULL,
  35         };
  36
  37         if (devargs == NULL)
  38                 return 0;
  39
  40         sa->kvargs = rte_kvargs_parse(devargs->args, params);
  41         if (sa->kvargs == NULL)
  42                 return EINVAL;
  43
  44         return 0;
  45 }
  46
  47 void
  48 sfc_kvargs_cleanup(struct sfc_adapter *sa)
  49 {
  50         rte_kvargs_free(sa->kvargs);
  51 }
  52
  53 static int
  54 sfc_kvarg_match_value(const char *value, const char * const *values,
  55                       unsigned int n_values)
  56 {
  57         unsigned int i;
  58
  59         for (i = 0; i < n_values; ++i)
  60                 if (strcasecmp(value, values[i]) == 0)
  61                         return 1;
  62
  63         return 0;
  64 }
  65
  66 int
  67 sfc_kvargs_process(struct sfc_adapter *sa, const char *key_match,
  68                    arg_handler_t handler, void *opaque_arg)
  69 {
  70         if (sa->kvargs == NULL)
  71                 return 0;
  72
  73         return -rte_kvargs_process(sa->kvargs, key_match, handler, opaque_arg);
  74 }
  75
  76 int
  77 sfc_kvarg_bool_handler(__rte_unused const char *key,
  78                        const char *value_str, void *opaque)
  79 {
  80         const char * const true_strs[] = {
  81                 "1", "y", "yes", "on", "true"
  82         };
  83         const char * const false_strs[] = {
  84                 "0", "n", "no", "off", "false"
  85         };
  86         bool *value = opaque;
  87
  88         if (sfc_kvarg_match_value(value_str, true_strs,
  89                                   RTE_DIM(true_strs)))
  90                 *value = true;
  91         else if (sfc_kvarg_match_value(value_str, false_strs,
  92                                        RTE_DIM(false_strs)))
  93                 *value = false;
  94         else
  95                 return -EINVAL;
  96
  97         return 0;
  98 }
  99
 100 int
 101 sfc_kvarg_long_handler(__rte_unused const char *key,
 102                        const char *value_str, void *opaque)
 103 {
 104         long value;
 105         char *endptr;
 106
 107         if (!value_str || !opaque)
 108                 return -EINVAL;
 109
 110         value = strtol(value_str, &endptr, 0);
 111         if (endptr == value_str)
 112                 return -EINVAL;
 113
 114         *(long *)opaque = value;
 115
 116         return 0;
 117 }
 118
 119 int
 120 sfc_kvarg_string_handler(__rte_unused const char *key,
 121                          const char *value_str, void *opaque)
 122 {
 123         *(const char **)opaque = value_str;
 124
 125         return 0;
 126 }