drivers/bus/auxiliary/auxiliary_params.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright (c) 2021 NVIDIA Corporation & Affiliates
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_bus.h>
   8 #include <rte_dev.h>
   9 #include <rte_errno.h>
  10 #include <rte_kvargs.h>
  11
  12 #include "private.h"
  13 #include "rte_bus_auxiliary.h"
  14
  15 enum auxiliary_params {
  16         RTE_AUXILIARY_PARAM_NAME,
  17 };
  18
  19 static const char * const auxiliary_params_keys[] = {
  20         [RTE_AUXILIARY_PARAM_NAME] = "name",
  21         NULL,
  22 };
  23
  24 static int
  25 auxiliary_dev_match(const struct rte_device *dev,
  26               const void *_kvlist)
  27 {
  28         const struct rte_kvargs *kvlist = _kvlist;
  29         const char *key = auxiliary_params_keys[RTE_AUXILIARY_PARAM_NAME];
  30
  31         if (rte_kvargs_get_with_value(kvlist, key, dev->name) == NULL)
  32                 return -1;
  33
  34         return 0;
  35 }
  36
  37 void *
  38 auxiliary_dev_iterate(const void *start,
  39                     const char *str,
  40                     const struct rte_dev_iterator *it __rte_unused)
  41 {
  42         rte_bus_find_device_t find_device;
  43         struct rte_kvargs *kvargs = NULL;
  44         struct rte_device *dev;
  45
  46         if (str != NULL) {
  47                 kvargs = rte_kvargs_parse(str, auxiliary_params_keys);
  48                 if (kvargs == NULL) {
  49                         AUXILIARY_LOG(ERR, "cannot parse argument list %s",
  50                                       str);
  51                         rte_errno = EINVAL;
  52                         return NULL;
  53                 }
  54         }
  55         find_device = auxiliary_bus.bus.find_device;
  56         dev = find_device(start, auxiliary_dev_match, kvargs);
  57         rte_kvargs_free(kvargs);
  58         return dev;
  59 }