2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
38 #include <linux/in6.h>
39 #include <linux/if_arp.h>
40 #include <linux/netdevice.h>
41 #include <linux/inetdevice.h>
42 #include <linux/socket.h>
43 #include <linux/if_vlan.h>
44 #include <rdma/ib_verbs.h>
45 #include <rdma/ib_pack.h>
46 #include <net/if_inet6.h>
49 struct rdma_addr_client {
51 struct completion comp;
55 * rdma_addr_register_client - Register an address client.
57 void rdma_addr_register_client(struct rdma_addr_client *client);
60 * rdma_addr_unregister_client - Deregister an address client.
61 * @client: Client object to deregister.
63 void rdma_addr_unregister_client(struct rdma_addr_client *client);
65 struct rdma_dev_addr {
66 unsigned char src_dev_addr[MAX_ADDR_LEN];
67 unsigned char dst_dev_addr[MAX_ADDR_LEN];
68 unsigned char broadcast[MAX_ADDR_LEN];
69 unsigned short dev_type;
71 enum rdma_transport_type transport;
75 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
78 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
82 * rdma_resolve_ip - Resolve source and destination IP addresses to
83 * RDMA hardware addresses.
84 * @client: Address client associated with request.
85 * @src_addr: An optional source address to use in the resolution. If a
86 * source address is not provided, a usable address will be returned via
88 * @dst_addr: The destination address to resolve.
89 * @addr: A reference to a data location that will receive the resolved
90 * addresses. The data location must remain valid until the callback has
92 * @timeout_ms: Amount of time to wait for the address resolution to complete.
93 * @callback: Call invoked once address resolution has completed, timed out,
94 * or been canceled. A status of 0 indicates success.
95 * @context: User-specified context associated with the call.
97 int rdma_resolve_ip(struct rdma_addr_client *client,
98 struct sockaddr *src_addr, struct sockaddr *dst_addr,
99 struct rdma_dev_addr *addr, int timeout_ms,
100 void (*callback)(int status, struct sockaddr *src_addr,
101 struct rdma_dev_addr *addr, void *context),
104 void rdma_addr_cancel(struct rdma_dev_addr *addr);
106 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
107 const unsigned char *dst_dev_addr);
108 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id,
110 int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac,
111 u16 *vlan_id, u32 scope_id);
113 static inline int ip_addr_size(struct sockaddr *addr)
115 return addr->sa_family == AF_INET6 ?
116 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
119 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
121 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
124 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
126 dev_addr->broadcast[8] = pkey >> 8;
127 dev_addr->broadcast[9] = (unsigned char) pkey;
130 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
133 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
136 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
138 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
141 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
145 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0)
150 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
152 switch (addr->sa_family) {
154 ipv6_addr_set_v4mapped(((struct sockaddr_in *)addr)->sin_addr.s_addr,
155 (struct in6_addr *)gid);
158 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr,
167 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
168 static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid,
171 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
172 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
173 memset(out_in, 0, sizeof(*out_in));
174 out_in->sin_len = sizeof(*out_in);
175 out_in->sin_family = AF_INET;
176 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
178 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
179 memset(out_in, 0, sizeof(*out_in));
180 out_in->sin6_len = sizeof(*out_in);
181 out_in->sin6_family = AF_INET6;
182 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
183 if (scope_id < 256 &&
184 IN6_IS_SCOPE_LINKLOCAL(&out_in->sin6_addr))
185 out_in->sin6_scope_id = scope_id;
190 u32 rdma_get_ipv6_scope_id(struct ib_device *ib, u8 port_num);
192 /* This func is called only in loopback ip address (127.0.0.1)
193 * case in which sgid is not relevant
195 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
200 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
202 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
203 dev_addr->dev_type != ARPHRD_INFINIBAND)
204 iboe_addr_get_sgid(dev_addr, gid);
206 memcpy(gid, dev_addr->src_dev_addr +
207 rdma_addr_gid_offset(dev_addr), sizeof *gid);
210 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
212 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
215 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
217 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
220 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
222 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
225 static inline enum ib_mtu iboe_get_mtu(int mtu)
228 * reduce IB headers from effective IBoE MTU. 28 stands for
229 * atomic header which is the biggest possible header after BTH
231 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
233 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
235 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
237 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
239 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
241 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
247 static inline int iboe_get_rate(struct net_device *dev)
249 if (dev->if_baudrate >= IF_Gbps(40))
250 return IB_RATE_40_GBPS;
251 else if (dev->if_baudrate >= IF_Gbps(30))
252 return IB_RATE_30_GBPS;
253 else if (dev->if_baudrate >= IF_Gbps(20))
254 return IB_RATE_20_GBPS;
255 else if (dev->if_baudrate >= IF_Gbps(10))
256 return IB_RATE_10_GBPS;
258 return IB_RATE_PORT_CURRENT;
261 static inline int rdma_link_local_addr(struct in6_addr *addr)
263 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
264 addr->s6_addr32[1] == 0)
270 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
272 memcpy(mac, &addr->s6_addr[8], 3);
273 memcpy(mac + 3, &addr->s6_addr[13], 3);
277 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
279 return addr->s6_addr[0] == 0xff;
282 static inline void resolve_mcast_mac(struct in6_addr *addr, u8 *mac)
284 if (addr->s6_addr[0] != 0xff)
287 #ifdef DUAL_MODE_MCAST_MAC
288 if (addr->s6_addr[1] == 0x0e) /* IPv4 */
289 ip_eth_mc_map(addr->s6_addr32[3], mac);
292 ipv6_eth_mc_map(addr, mac);
296 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
302 for (i = 2; i < 6; ++i)
303 mac[i] = addr->s6_addr[i + 10];
306 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
310 vid = dgid->raw[11] << 8 | dgid->raw[12];
311 return vid < 0x1000 ? vid : 0xffff;
314 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
316 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev));
319 #endif /* IB_ADDR_H */