include/rdma/ib_addr.h

   1 /*
   2  * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
   3  * Copyright (c) 2005 Intel Corporation.  All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #if !defined(IB_ADDR_H)
  35 #define IB_ADDR_H
  36
  37 #include <linux/in.h>
  38 #include <linux/in6.h>
  39 #include <linux/if_arp.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/socket.h>
  42 #include <rdma/ib_verbs.h>
  43
  44 struct rdma_addr_client {
  45         atomic_t refcount;
  46         struct completion comp;
  47 };
  48
  49 /**
  50  * rdma_addr_register_client - Register an address client.
  51  */
  52 void rdma_addr_register_client(struct rdma_addr_client *client);
  53
  54 /**
  55  * rdma_addr_unregister_client - Deregister an address client.
  56  * @client: Client object to deregister.
  57  */
  58 void rdma_addr_unregister_client(struct rdma_addr_client *client);
  59
  60 struct rdma_dev_addr {
  61         unsigned char src_dev_addr[MAX_ADDR_LEN];
  62         unsigned char dst_dev_addr[MAX_ADDR_LEN];
  63         unsigned char broadcast[MAX_ADDR_LEN];
  64         unsigned short dev_type;
  65         int bound_dev_if;
  66 };
  67
  68 /**
  69  * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  70  *   address.
  71  */
  72 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
  73
  74 /**
  75  * rdma_resolve_ip - Resolve source and destination IP addresses to
  76  *   RDMA hardware addresses.
  77  * @client: Address client associated with request.
  78  * @src_addr: An optional source address to use in the resolution.  If a
  79  *   source address is not provided, a usable address will be returned via
  80  *   the callback.
  81  * @dst_addr: The destination address to resolve.
  82  * @addr: A reference to a data location that will receive the resolved
  83  *   addresses.  The data location must remain valid until the callback has
  84  *   been invoked.
  85  * @timeout_ms: Amount of time to wait for the address resolution to complete.
  86  * @callback: Call invoked once address resolution has completed, timed out,
  87  *   or been canceled.  A status of 0 indicates success.
  88  * @context: User-specified context associated with the call.
  89  */
  90 int rdma_resolve_ip(struct rdma_addr_client *client,
  91                     struct sockaddr *src_addr, struct sockaddr *dst_addr,
  92                     struct rdma_dev_addr *addr, int timeout_ms,
  93                     void (*callback)(int status, struct sockaddr *src_addr,
  94                                      struct rdma_dev_addr *addr, void *context),
  95                     void *context);
  96
  97 void rdma_addr_cancel(struct rdma_dev_addr *addr);
  98
  99 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
 100               const unsigned char *dst_dev_addr);
 101
 102 static inline int ip_addr_size(struct sockaddr *addr)
 103 {
 104         return addr->sa_family == AF_INET6 ?
 105                sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
 106 }
 107
 108 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
 109 {
 110         return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
 111 }
 112
 113 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
 114 {
 115         dev_addr->broadcast[8] = pkey >> 8;
 116         dev_addr->broadcast[9] = (unsigned char) pkey;
 117 }
 118
 119 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
 120                                     union ib_gid *gid)
 121 {
 122         memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
 123 }
 124
 125 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
 126 {
 127         return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
 128 }
 129
 130 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
 131 {
 132         memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
 133 }
 134
 135 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
 136 {
 137         memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
 138 }
 139
 140 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
 141 {
 142         memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
 143 }
 144
 145 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
 146 {
 147         memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
 148 }
 149
 150 #endif /* IB_ADDR_H */