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 struct net_device *src_dev; 65 }; 66 67 /** 68 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 69 * address. 70 */ 71 int 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 */ 89 int 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 96 void rdma_addr_cancel(struct rdma_dev_addr *addr); 97 98 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 99 const unsigned char *dst_dev_addr); 100 101 static 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 } 106 107 static 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 } 111 112 static 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 } 117 118 static 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 } 123 124 static 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 } 129 130 static 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 } 135 136 static 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 } 141 142 static 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 } 147 148 static 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 } 153 154 static 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