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