drivers/net/vdev_netvsc/vdev_netvsc.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 6WIND S.A.
   3  * Copyright 2017 Mellanox Technologies, Ltd.
   4  */
   5
   6 #include <stddef.h>
   7
   8 #include <rte_bus_vdev.h>
   9 #include <rte_common.h>
  10 #include <rte_config.h>
  11 #include <rte_kvargs.h>
  12 #include <rte_log.h>
  13
  14 #define VDEV_NETVSC_DRIVER net_vdev_netvsc
  15 #define VDEV_NETVSC_ARG_IFACE "iface"
  16 #define VDEV_NETVSC_ARG_MAC "mac"
  17
  18 #define DRV_LOG(level, ...) \
  19         rte_log(RTE_LOG_ ## level, \
  20                 vdev_netvsc_logtype, \
  21                 RTE_FMT(RTE_STR(VDEV_NETVSC_DRIVER) ": " \
  22                         RTE_FMT_HEAD(__VA_ARGS__,) "\n", \
  23                 RTE_FMT_TAIL(__VA_ARGS__,)))
  24
  25 /** Driver-specific log messages type. */
  26 static int vdev_netvsc_logtype;
  27
  28 /** Number of driver instances relying on context list. */
  29 static unsigned int vdev_netvsc_ctx_inst;
  30
  31 /**
  32  * Probe NetVSC interfaces.
  33  *
  34  * @param dev
  35  *   Virtual device context for driver instance.
  36  *
  37  * @return
  38  *    Always 0, even in case of errors.
  39  */
  40 static int
  41 vdev_netvsc_vdev_probe(struct rte_vdev_device *dev)
  42 {
  43         static const char *const vdev_netvsc_arg[] = {
  44                 VDEV_NETVSC_ARG_IFACE,
  45                 VDEV_NETVSC_ARG_MAC,
  46                 NULL,
  47         };
  48         const char *name = rte_vdev_device_name(dev);
  49         const char *args = rte_vdev_device_args(dev);
  50         struct rte_kvargs *kvargs = rte_kvargs_parse(args ? args : "",
  51                                                      vdev_netvsc_arg);
  52
  53         DRV_LOG(DEBUG, "invoked as \"%s\", using arguments \"%s\"", name, args);
  54         if (!kvargs) {
  55                 DRV_LOG(ERR, "cannot parse arguments list");
  56                 goto error;
  57         }
  58 error:
  59         if (kvargs)
  60                 rte_kvargs_free(kvargs);
  61         ++vdev_netvsc_ctx_inst;
  62         return 0;
  63 }
  64
  65 /**
  66  * Remove driver instance.
  67  *
  68  * @param dev
  69  *   Virtual device context for driver instance.
  70  *
  71  * @return
  72  *   Always 0.
  73  */
  74 static int
  75 vdev_netvsc_vdev_remove(__rte_unused struct rte_vdev_device *dev)
  76 {
  77         --vdev_netvsc_ctx_inst;
  78         return 0;
  79 }
  80
  81 /** Virtual device descriptor. */
  82 static struct rte_vdev_driver vdev_netvsc_vdev = {
  83         .probe = vdev_netvsc_vdev_probe,
  84         .remove = vdev_netvsc_vdev_remove,
  85 };
  86
  87 RTE_PMD_REGISTER_VDEV(VDEV_NETVSC_DRIVER, vdev_netvsc_vdev);
  88 RTE_PMD_REGISTER_ALIAS(VDEV_NETVSC_DRIVER, eth_vdev_netvsc);
  89 RTE_PMD_REGISTER_PARAM_STRING(net_vdev_netvsc,
  90                               VDEV_NETVSC_ARG_IFACE "=<string> "
  91                               VDEV_NETVSC_ARG_MAC "=<string>");
  92
  93 /** Initialize driver log type. */
  94 RTE_INIT(vdev_netvsc_init_log)
  95 {
  96         vdev_netvsc_logtype = rte_log_register("pmd.vdev_netvsc");
  97         if (vdev_netvsc_logtype >= 0)
  98                 rte_log_set_level(vdev_netvsc_logtype, RTE_LOG_NOTICE);
  99 }