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 licensed under one of the following licenses:
   6  *
   7  * 1) under the terms of the "Common Public License 1.0" a copy of which is
   8  *    available from the Open Source Initiative, see
   9  *    http://www.opensource.org/licenses/cpl.php.
  10  *
  11  * 2) under the terms of the "The BSD License" a copy of which is
  12  *    available from the Open Source Initiative, see
  13  *    http://www.opensource.org/licenses/bsd-license.php.
  14  *
  15  * 3) under the terms of the "GNU General Public License (GPL) Version 2" a
  16  *    copy of which is available from the Open Source Initiative, see
  17  *    http://www.opensource.org/licenses/gpl-license.php.
  18  *
  19  * Licensee has the right to choose one of the above licenses.
  20  *
  21  * Redistributions of source code must retain the above copyright
  22  * notice and one of the license notices.
  23  *
  24  * Redistributions in binary form must reproduce both the above copyright
  25  * notice, one of the license notices in the documentation
  26  * and/or other materials provided with the distribution.
  27  *
  28  */
  29
  30 #if !defined(IB_ADDR_H)
  31 #define IB_ADDR_H
  32
  33 #include <linux/in.h>
  34 #include <linux/in6.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/socket.h>
  37 #include <rdma/ib_verbs.h>
  38
  39 struct rdma_dev_addr {
  40         unsigned char src_dev_addr[MAX_ADDR_LEN];
  41         unsigned char dst_dev_addr[MAX_ADDR_LEN];
  42         unsigned char broadcast[MAX_ADDR_LEN];
  43         enum rdma_node_type dev_type;
  44 };
  45
  46 /**
  47  * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  48  *   address.
  49  */
  50 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
  51
  52 /**
  53  * rdma_resolve_ip - Resolve source and destination IP addresses to
  54  *   RDMA hardware addresses.
  55  * @src_addr: An optional source address to use in the resolution.  If a
  56  *   source address is not provided, a usable address will be returned via
  57  *   the callback.
  58  * @dst_addr: The destination address to resolve.
  59  * @addr: A reference to a data location that will receive the resolved
  60  *   addresses.  The data location must remain valid until the callback has
  61  *   been invoked.
  62  * @timeout_ms: Amount of time to wait for the address resolution to complete.
  63  * @callback: Call invoked once address resolution has completed, timed out,
  64  *   or been canceled.  A status of 0 indicates success.
  65  * @context: User-specified context associated with the call.
  66  */
  67 int rdma_resolve_ip(struct sockaddr *src_addr, struct sockaddr *dst_addr,
  68                     struct rdma_dev_addr *addr, int timeout_ms,
  69                     void (*callback)(int status, struct sockaddr *src_addr,
  70                                      struct rdma_dev_addr *addr, void *context),
  71                     void *context);
  72
  73 void rdma_addr_cancel(struct rdma_dev_addr *addr);
  74
  75 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
  76               const unsigned char *dst_dev_addr);
  77
  78 static inline int ip_addr_size(struct sockaddr *addr)
  79 {
  80         return addr->sa_family == AF_INET6 ?
  81                sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
  82 }
  83
  84 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
  85 {
  86         return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
  87 }
  88
  89 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
  90 {
  91         dev_addr->broadcast[8] = pkey >> 8;
  92         dev_addr->broadcast[9] = (unsigned char) pkey;
  93 }
  94
  95 static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
  96                                     union ib_gid *gid)
  97 {
  98         memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
  99 }
 100
 101 static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
 102                                     union ib_gid *gid)
 103 {
 104         memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
 105 }
 106
 107 static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 108                                     union ib_gid *gid)
 109 {
 110         memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
 111 }
 112
 113 static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
 114                                     union ib_gid *gid)
 115 {
 116         memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
 117 }
 118
 119 static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 120                                     union ib_gid *gid)
 121 {
 122         memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
 123 }
 124
 125 static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 126                                     union ib_gid *gid)
 127 {
 128         memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
 129 }
 130
 131 #endif /* IB_ADDR_H */