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_addr_client {
  40         atomic_t refcount;
  41         struct completion comp;
  42 };
  43
  44 /**
  45  * rdma_addr_register_client - Register an address client.
  46  */
  47 void rdma_addr_register_client(struct rdma_addr_client *client);
  48
  49 /**
  50  * rdma_addr_unregister_client - Deregister an address client.
  51  * @client: Client object to deregister.
  52  */
  53 void rdma_addr_unregister_client(struct rdma_addr_client *client);
  54
  55 struct rdma_dev_addr {
  56         unsigned char src_dev_addr[MAX_ADDR_LEN];
  57         unsigned char dst_dev_addr[MAX_ADDR_LEN];
  58         unsigned char broadcast[MAX_ADDR_LEN];
  59         enum rdma_node_type dev_type;
  60 };
  61
  62 /**
  63  * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  64  *   address.
  65  */
  66 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
  67
  68 /**
  69  * rdma_resolve_ip - Resolve source and destination IP addresses to
  70  *   RDMA hardware addresses.
  71  * @client: Address client associated with request.
  72  * @src_addr: An optional source address to use in the resolution.  If a
  73  *   source address is not provided, a usable address will be returned via
  74  *   the callback.
  75  * @dst_addr: The destination address to resolve.
  76  * @addr: A reference to a data location that will receive the resolved
  77  *   addresses.  The data location must remain valid until the callback has
  78  *   been invoked.
  79  * @timeout_ms: Amount of time to wait for the address resolution to complete.
  80  * @callback: Call invoked once address resolution has completed, timed out,
  81  *   or been canceled.  A status of 0 indicates success.
  82  * @context: User-specified context associated with the call.
  83  */
  84 int rdma_resolve_ip(struct rdma_addr_client *client,
  85                     struct sockaddr *src_addr, struct sockaddr *dst_addr,
  86                     struct rdma_dev_addr *addr, int timeout_ms,
  87                     void (*callback)(int status, struct sockaddr *src_addr,
  88                                      struct rdma_dev_addr *addr, void *context),
  89                     void *context);
  90
  91 void rdma_addr_cancel(struct rdma_dev_addr *addr);
  92
  93 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
  94               const unsigned char *dst_dev_addr);
  95
  96 static inline int ip_addr_size(struct sockaddr *addr)
  97 {
  98         return addr->sa_family == AF_INET6 ?
  99                sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
 100 }
 101
 102 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
 103 {
 104         return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
 105 }
 106
 107 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
 108 {
 109         dev_addr->broadcast[8] = pkey >> 8;
 110         dev_addr->broadcast[9] = (unsigned char) pkey;
 111 }
 112
 113 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
 114                                     union ib_gid *gid)
 115 {
 116         memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
 117 }
 118
 119 static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 120                                     union ib_gid *gid)
 121 {
 122         memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
 123 }
 124
 125 static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
 126                                     union ib_gid *gid)
 127 {
 128         memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
 129 }
 130
 131 static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 132                                     union ib_gid *gid)
 133 {
 134         memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
 135 }
 136
 137 static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
 138                                     union ib_gid *gid)
 139 {
 140         memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
 141 }
 142
 143 static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 144                                     union ib_gid *gid)
 145 {
 146         memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
 147 }
 148
 149 static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 150                                     union ib_gid *gid)
 151 {
 152         memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
 153 }
 154
 155 #endif /* IB_ADDR_H */