lib/librte_eal/common/eal_common_nonpci_devs.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   Copyright(c) 2014 6WIND S.A.
   6  *   All rights reserved.
   7  *
   8  *   Redistribution and use in source and binary forms, with or without
   9  *   modification, are permitted provided that the following conditions
  10  *   are met:
  11  *
  12  *     * Redistributions of source code must retain the above copyright
  13  *       notice, this list of conditions and the following disclaimer.
  14  *     * Redistributions in binary form must reproduce the above copyright
  15  *       notice, this list of conditions and the following disclaimer in
  16  *       the documentation and/or other materials provided with the
  17  *       distribution.
  18  *     * Neither the name of Intel Corporation nor the names of its
  19  *       contributors may be used to endorse or promote products derived
  20  *       from this software without specific prior written permission.
  21  *
  22  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <string.h>
  36 #include <inttypes.h>
  37 #include <rte_string_fns.h>
  38 #ifdef RTE_LIBRTE_PMD_RING
  39 #include <rte_eth_ring.h>
  40 #endif
  41 #ifdef RTE_LIBRTE_PMD_PCAP
  42 #include <rte_eth_pcap.h>
  43 #endif
  44 #ifdef RTE_LIBRTE_PMD_XENVIRT
  45 #include <rte_eth_xenvirt.h>
  46 #endif
  47 #include <rte_debug.h>
  48 #include <rte_devargs.h>
  49 #include "eal_private.h"
  50
  51 struct device_init {
  52         const char *dev_prefix;
  53         int (*init_fn)(const char*, const char *);
  54 };
  55
  56 #define NUM_DEV_TYPES (sizeof(dev_types)/sizeof(dev_types[0]))
  57 struct device_init dev_types[] = {
  58 #ifdef RTE_LIBRTE_PMD_RING
  59                 {
  60                         .dev_prefix = RTE_ETH_RING_PARAM_NAME,
  61                         .init_fn = rte_pmd_ring_init
  62                 },
  63 #endif
  64 #ifdef RTE_LIBRTE_PMD_PCAP
  65                 {
  66                         .dev_prefix = RTE_ETH_PCAP_PARAM_NAME,
  67                         .init_fn = rte_pmd_pcap_init
  68                 },
  69 #endif
  70 #ifdef RTE_LIBRTE_PMD_XENVIRT
  71                 {
  72                         .dev_prefix = RTE_ETH_XENVIRT_PARAM_NAME,
  73                         .init_fn = rte_pmd_xenvirt_init
  74                 },
  75 #endif
  76                 {
  77                         .dev_prefix = "-nodev-",
  78                         .init_fn = NULL
  79                 }
  80 };
  81
  82 int
  83 rte_eal_non_pci_ethdev_init(void)
  84 {
  85         struct rte_devargs *devargs;
  86         uint8_t i;
  87
  88         /* call the init function for each virtual device */
  89         TAILQ_FOREACH(devargs, &devargs_list, next) {
  90
  91                 if (devargs->type != RTE_DEVTYPE_VIRTUAL)
  92                         continue;
  93
  94                 for (i = 0; i < NUM_DEV_TYPES; i++) {
  95                         /* search a driver prefix in virtual device name */
  96                         if (!strncmp(dev_types[i].dev_prefix,
  97                                     devargs->virtual.drv_name,
  98                                      sizeof(dev_types[i].dev_prefix) - 1)) {
  99                                 dev_types[i].init_fn(devargs->virtual.drv_name,
 100                                                      devargs->args);
 101                                 break;
 102                         }
 103                 }
 104
 105                 if (i == NUM_DEV_TYPES) {
 106                         rte_panic("no driver found for %s\n",
 107                                   devargs->virtual.drv_name);
 108                 }
 109         }
 110         return 0;
 111 }