ceph/src/seastar/dpdk/lib/librte_eal/common/eal_common_dev.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 <stdio.h>
  36 #include <string.h>
  37 #include <inttypes.h>
  38 #include <sys/queue.h>
  39
  40 #include <rte_dev.h>
  41 #include <rte_devargs.h>
  42 #include <rte_debug.h>
  43 #include <rte_devargs.h>
  44 #include <rte_log.h>
  45
  46 #include "eal_private.h"
  47
  48 int rte_eal_dev_attach(const char *name, const char *devargs)
  49 {
  50         struct rte_pci_addr addr;
  51
  52         if (name == NULL || devargs == NULL) {
  53                 RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
  54                 return -EINVAL;
  55         }
  56
  57         if (eal_parse_pci_DomBDF(name, &addr) == 0) {
  58                 if (rte_pci_probe_one(&addr) < 0)
  59                         goto err;
  60
  61         } else {
  62                 if (rte_vdev_init(name, devargs))
  63                         goto err;
  64         }
  65
  66         return 0;
  67
  68 err:
  69         RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n", name);
  70         return -EINVAL;
  71 }
  72
  73 int rte_eal_dev_detach(const char *name)
  74 {
  75         struct rte_pci_addr addr;
  76
  77         if (name == NULL) {
  78                 RTE_LOG(ERR, EAL, "Invalid device provided.\n");
  79                 return -EINVAL;
  80         }
  81
  82         if (eal_parse_pci_DomBDF(name, &addr) == 0) {
  83                 if (rte_pci_detach(&addr) < 0)
  84                         goto err;
  85         } else {
  86                 if (rte_vdev_uninit(name))
  87                         goto err;
  88         }
  89         return 0;
  90
  91 err:
  92         RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n", name);
  93         return -EINVAL;
  94 }