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/netdevice.h>
  40 #include <linux/socket.h>
  41 #include <rdma/ib_verbs.h>
  42
  43 struct rdma_addr_client {
  44         atomic_t refcount;
  45         struct completion comp;
  46 };
  47
  48 /**
  49  * rdma_addr_register_client - Register an address client.
  50  */
  51 void rdma_addr_register_client(struct rdma_addr_client *client);
  52
  53 /**
  54  * rdma_addr_unregister_client - Deregister an address client.
  55  * @client: Client object to deregister.
  56  */
  57 void rdma_addr_unregister_client(struct rdma_addr_client *client);
  58
  59 struct rdma_dev_addr {
  60         unsigned char src_dev_addr[MAX_ADDR_LEN];
  61         unsigned char dst_dev_addr[MAX_ADDR_LEN];
  62         unsigned char broadcast[MAX_ADDR_LEN];
  63         enum rdma_node_type dev_type;
  64 };
  65
  66 /**
  67  * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  68  *   address.
  69  */
  70 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
  71
  72 /**
  73  * rdma_resolve_ip - Resolve source and destination IP addresses to
  74  *   RDMA hardware addresses.
  75  * @client: Address client associated with request.
  76  * @src_addr: An optional source address to use in the resolution.  If a
  77  *   source address is not provided, a usable address will be returned via
  78  *   the callback.
  79  * @dst_addr: The destination address to resolve.
  80  * @addr: A reference to a data location that will receive the resolved
  81  *   addresses.  The data location must remain valid until the callback has
  82  *   been invoked.
  83  * @timeout_ms: Amount of time to wait for the address resolution to complete.
  84  * @callback: Call invoked once address resolution has completed, timed out,
  85  *   or been canceled.  A status of 0 indicates success.
  86  * @context: User-specified context associated with the call.
  87  */
  88 int rdma_resolve_ip(struct rdma_addr_client *client,
  89                     struct sockaddr *src_addr, struct sockaddr *dst_addr,
  90                     struct rdma_dev_addr *addr, int timeout_ms,
  91                     void (*callback)(int status, struct sockaddr *src_addr,
  92                                      struct rdma_dev_addr *addr, void *context),
  93                     void *context);
  94
  95 void rdma_addr_cancel(struct rdma_dev_addr *addr);
  96
  97 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
  98               const unsigned char *dst_dev_addr);
  99
 100 static inline int ip_addr_size(struct sockaddr *addr)
 101 {
 102         return addr->sa_family == AF_INET6 ?
 103                sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
 104 }
 105
 106 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
 107 {
 108         return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
 109 }
 110
 111 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
 112 {
 113         dev_addr->broadcast[8] = pkey >> 8;
 114         dev_addr->broadcast[9] = (unsigned char) pkey;
 115 }
 116
 117 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
 118                                     union ib_gid *gid)
 119 {
 120         memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
 121 }
 122
 123 static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 124                                     union ib_gid *gid)
 125 {
 126         memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
 127 }
 128
 129 static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
 130                                     union ib_gid *gid)
 131 {
 132         memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
 133 }
 134
 135 static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 136                                     union ib_gid *gid)
 137 {
 138         memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
 139 }
 140
 141 static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
 142                                     union ib_gid *gid)
 143 {
 144         memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
 145 }
 146
 147 static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 148                                     union ib_gid *gid)
 149 {
 150         memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
 151 }
 152
 153 static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 154                                     union ib_gid *gid)
 155 {
 156         memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
 157 }
 158
 159 #endif /* IB_ADDR_H */