ceph/src/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 /** Global list of device drivers. */
  49 static struct rte_driver_list dev_driver_list =
  50         TAILQ_HEAD_INITIALIZER(dev_driver_list);
  51 /** Global list of device drivers. */
  52 static struct rte_device_list dev_device_list =
  53         TAILQ_HEAD_INITIALIZER(dev_device_list);
  54
  55 /* register a driver */
  56 void
  57 rte_eal_driver_register(struct rte_driver *driver)
  58 {
  59         TAILQ_INSERT_TAIL(&dev_driver_list, driver, next);
  60 }
  61
  62 /* unregister a driver */
  63 void
  64 rte_eal_driver_unregister(struct rte_driver *driver)
  65 {
  66         TAILQ_REMOVE(&dev_driver_list, driver, next);
  67 }
  68
  69 void rte_eal_device_insert(struct rte_device *dev)
  70 {
  71         TAILQ_INSERT_TAIL(&dev_device_list, dev, next);
  72 }
  73
  74 void rte_eal_device_remove(struct rte_device *dev)
  75 {
  76         TAILQ_REMOVE(&dev_device_list, dev, next);
  77 }
  78
  79 int
  80 rte_eal_dev_init(void)
  81 {
  82         struct rte_devargs *devargs;
  83
  84         /*
  85          * Note that the dev_driver_list is populated here
  86          * from calls made to rte_eal_driver_register from constructor functions
  87          * embedded into PMD modules via the RTE_PMD_REGISTER_VDEV macro
  88          */
  89
  90         /* call the init function for each virtual device */
  91         TAILQ_FOREACH(devargs, &devargs_list, next) {
  92
  93                 if (devargs->type != RTE_DEVTYPE_VIRTUAL)
  94                         continue;
  95
  96                 if (rte_eal_vdev_init(devargs->virt.drv_name,
  97                                         devargs->args)) {
  98                         RTE_LOG(ERR, EAL, "failed to initialize %s device\n",
  99                                         devargs->virt.drv_name);
 100                         return -1;
 101                 }
 102         }
 103
 104         return 0;
 105 }
 106
 107 int rte_eal_dev_attach(const char *name, const char *devargs)
 108 {
 109         struct rte_pci_addr addr;
 110
 111         if (name == NULL || devargs == NULL) {
 112                 RTE_LOG(ERR, EAL, "Invalid device or arguments provided\n");
 113                 return -EINVAL;
 114         }
 115
 116         if (eal_parse_pci_DomBDF(name, &addr) == 0) {
 117                 if (rte_eal_pci_probe_one(&addr) < 0)
 118                         goto err;
 119
 120         } else {
 121                 if (rte_eal_vdev_init(name, devargs))
 122                         goto err;
 123         }
 124
 125         return 0;
 126
 127 err:
 128         RTE_LOG(ERR, EAL, "Driver cannot attach the device (%s)\n", name);
 129         return -EINVAL;
 130 }
 131
 132 int rte_eal_dev_detach(const char *name)
 133 {
 134         struct rte_pci_addr addr;
 135
 136         if (name == NULL) {
 137                 RTE_LOG(ERR, EAL, "Invalid device provided.\n");
 138                 return -EINVAL;
 139         }
 140
 141         if (eal_parse_pci_DomBDF(name, &addr) == 0) {
 142                 if (rte_eal_pci_detach(&addr) < 0)
 143                         goto err;
 144         } else {
 145                 if (rte_eal_vdev_uninit(name))
 146                         goto err;
 147         }
 148         return 0;
 149
 150 err:
 151         RTE_LOG(ERR, EAL, "Driver cannot detach the device (%s)\n", name);
 152         return -EINVAL;
 153 }