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