drivers/bus/vdev/vdev_params.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2018 Gaëtan Rivet
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_dev.h>
   8 #include <rte_bus.h>
   9 #include <rte_kvargs.h>
  10 #include <rte_errno.h>
  11
  12 #include "vdev_logs.h"
  13 #include "vdev_private.h"
  14
  15 enum vdev_params {
  16         RTE_VDEV_PARAM_NAME,
  17         RTE_VDEV_PARAM_MAX,
  18 };
  19
  20 static const char * const vdev_params_keys[] = {
  21         [RTE_VDEV_PARAM_NAME] = "name",
  22         [RTE_VDEV_PARAM_MAX] = NULL,
  23 };
  24
  25 static int
  26 vdev_dev_match(const struct rte_device *dev,
  27                const void *_kvlist)
  28 {
  29         int ret;
  30         const struct rte_kvargs *kvlist = _kvlist;
  31         char *name;
  32
  33         /* cannot pass const dev->name to rte_kvargs_process() */
  34         name = strdup(dev->name);
  35         if (name == NULL)
  36                 return -1;
  37         ret = rte_kvargs_process(kvlist,
  38                 vdev_params_keys[RTE_VDEV_PARAM_NAME],
  39                 rte_kvargs_strcmp, name);
  40         free(name);
  41         if (ret != 0)
  42                 return -1;
  43
  44         return 0;
  45 }
  46
  47 void *
  48 rte_vdev_dev_iterate(const void *start,
  49                      const char *str,
  50                      const struct rte_dev_iterator *it __rte_unused)
  51 {
  52         struct rte_kvargs *kvargs = NULL;
  53         struct rte_device *dev;
  54
  55         if (str != NULL) {
  56                 kvargs = rte_kvargs_parse(str, vdev_params_keys);
  57                 if (kvargs == NULL) {
  58                         VDEV_LOG(ERR, "cannot parse argument list\n");
  59                         rte_errno = EINVAL;
  60                         return NULL;
  61                 }
  62         }
  63         dev = rte_vdev_find_device(start, vdev_dev_match, kvargs);
  64         rte_kvargs_free(kvargs);
  65         return dev;
  66 }