LXR linux/include/rdma/ib

   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
  43struct rdma_addr_client {
  44        atomic_t refcount;
  45        struct completion comp;
  46};
  47
  48/**
  49 * rdma_addr_register_client - Register an address client.
  50 */
  51void 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 */
  57void rdma_addr_unregister_client(struct rdma_addr_client *client);
  58
  59struct 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        struct net_device *src_dev;
  65};
  66
  67/**
  68 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
  69 *   address.
  70 */
  71int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
  72
  73/**
  74 * rdma_resolve_ip - Resolve source and destination IP addresses to
  75 *   RDMA hardware addresses.
  76 * @client: Address client associated with request.
  77 * @src_addr: An optional source address to use in the resolution.  If a
  78 *   source address is not provided, a usable address will be returned via
  79 *   the callback.
  80 * @dst_addr: The destination address to resolve.
  81 * @addr: A reference to a data location that will receive the resolved
  82 *   addresses.  The data location must remain valid until the callback has
  83 *   been invoked.
  84 * @timeout_ms: Amount of time to wait for the address resolution to complete.
  85 * @callback: Call invoked once address resolution has completed, timed out,
  86 *   or been canceled.  A status of 0 indicates success.
  87 * @context: User-specified context associated with the call.
  88 */
  89int rdma_resolve_ip(struct rdma_addr_client *client,
  90                    struct sockaddr *src_addr, struct sockaddr *dst_addr,
  91                    struct rdma_dev_addr *addr, int timeout_ms,
  92                    void (*callback)(int status, struct sockaddr *src_addr,
  93                                     struct rdma_dev_addr *addr, void *context),
  94                    void *context);
  95
  96void rdma_addr_cancel(struct rdma_dev_addr *addr);
  97
  98int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
  99              const unsigned char *dst_dev_addr);
 100
 101static inline int ip_addr_size(struct sockaddr *addr)
 102{
 103        return addr->sa_family == AF_INET6 ?
 104               sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
 105}
 106
 107static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
 108{
 109        return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
 110}
 111
 112static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
 113{
 114        dev_addr->broadcast[8] = pkey >> 8;
 115        dev_addr->broadcast[9] = (unsigned char) pkey;
 116}
 117
 118static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
 119                                    union ib_gid *gid)
 120{
 121        memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
 122}
 123
 124static inline void ib_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 125                                    union ib_gid *gid)
 126{
 127        memcpy(gid, dev_addr->src_dev_addr + 4, sizeof *gid);
 128}
 129
 130static inline void ib_addr_set_sgid(struct rdma_dev_addr *dev_addr,
 131                                    union ib_gid *gid)
 132{
 133        memcpy(dev_addr->src_dev_addr + 4, gid, sizeof *gid);
 134}
 135
 136static inline void ib_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 137                                    union ib_gid *gid)
 138{
 139        memcpy(gid, dev_addr->dst_dev_addr + 4, sizeof *gid);
 140}
 141
 142static inline void ib_addr_set_dgid(struct rdma_dev_addr *dev_addr,
 143                                    union ib_gid *gid)
 144{
 145        memcpy(dev_addr->dst_dev_addr + 4, gid, sizeof *gid);
 146}
 147
 148static inline void iw_addr_get_sgid(struct rdma_dev_addr *dev_addr,
 149                                    union ib_gid *gid)
 150{
 151        memcpy(gid, dev_addr->src_dev_addr, sizeof *gid);
 152}
 153
 154static inline void iw_addr_get_dgid(struct rdma_dev_addr *dev_addr,
 155                                    union ib_gid *gid)
 156{
 157        memcpy(gid, dev_addr->dst_dev_addr, sizeof *gid);
 158}
 159
 160#endif /* IB_ADDR_H */
 161