2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
4 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
5 * Copyright (c) 2005 Intel Corporation. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #if !defined(IB_ADDR_H)
40 #include <linux/in6.h>
41 #include <linux/if_arp.h>
42 #include <linux/netdevice.h>
43 #include <linux/inetdevice.h>
44 #include <linux/socket.h>
45 #include <linux/if_vlan.h>
47 #include <net/if_inet6.h>
49 #include <rdma/ib_verbs.h>
50 #include <rdma/ib_pack.h>
53 struct rdma_addr_client {
55 struct completion comp;
59 * rdma_addr_register_client - Register an address client.
61 void rdma_addr_register_client(struct rdma_addr_client *client);
64 * rdma_addr_unregister_client - Deregister an address client.
65 * @client: Client object to deregister.
67 void rdma_addr_unregister_client(struct rdma_addr_client *client);
70 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
71 * @src_dev_addr: Source MAC address.
72 * @dst_dev_addr: Destination MAC address.
73 * @broadcast: Broadcast address of the device.
74 * @dev_type: The interface hardware type of the device.
75 * @bound_dev_if: An optional device interface index.
76 * @transport: The transport type used.
77 * @net: Network namespace containing the bound_dev_if net_dev.
80 struct rdma_dev_addr {
81 unsigned char src_dev_addr[MAX_ADDR_LEN];
82 unsigned char dst_dev_addr[MAX_ADDR_LEN];
83 unsigned char broadcast[MAX_ADDR_LEN];
84 unsigned short dev_type;
86 enum rdma_transport_type transport;
88 enum rdma_network_type network;
93 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
96 * The dev_addr->net field must be initialized.
98 int rdma_translate_ip(const struct sockaddr *addr,
99 struct rdma_dev_addr *dev_addr, u16 *vlan_id);
102 * rdma_resolve_ip - Resolve source and destination IP addresses to
103 * RDMA hardware addresses.
104 * @client: Address client associated with request.
105 * @src_addr: An optional source address to use in the resolution. If a
106 * source address is not provided, a usable address will be returned via
108 * @dst_addr: The destination address to resolve.
109 * @addr: A reference to a data location that will receive the resolved
110 * addresses. The data location must remain valid until the callback has
111 * been invoked. The net field of the addr struct must be valid.
112 * @timeout_ms: Amount of time to wait for the address resolution to complete.
113 * @callback: Call invoked once address resolution has completed, timed out,
114 * or been canceled. A status of 0 indicates success.
115 * @context: User-specified context associated with the call.
117 int rdma_resolve_ip(struct rdma_addr_client *client,
118 struct sockaddr *src_addr, struct sockaddr *dst_addr,
119 struct rdma_dev_addr *addr, int timeout_ms,
120 void (*callback)(int status, struct sockaddr *src_addr,
121 struct rdma_dev_addr *addr, void *context),
124 int rdma_resolve_ip_route(struct sockaddr *src_addr,
125 const struct sockaddr *dst_addr,
126 struct rdma_dev_addr *addr);
128 void rdma_addr_cancel(struct rdma_dev_addr *addr);
130 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
131 const unsigned char *dst_dev_addr);
133 int rdma_addr_size(struct sockaddr *addr);
135 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
136 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
137 const union ib_gid *dgid,
138 u8 *smac, u16 *vlan_id, int *if_index,
141 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
143 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
146 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
148 dev_addr->broadcast[8] = pkey >> 8;
149 dev_addr->broadcast[9] = (unsigned char) pkey;
152 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
155 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
158 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
160 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
163 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
167 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0)
172 static inline int rdma_ip2gid(const struct sockaddr *addr, union ib_gid *gid)
174 switch (addr->sa_family) {
176 ipv6_addr_set_v4mapped(((const struct sockaddr_in *)
177 addr)->sin_addr.s_addr,
178 (struct in6_addr *)gid);
181 memcpy(gid->raw, &((const struct sockaddr_in6 *)addr)->sin6_addr, 16);
182 /* make sure scope ID gets zeroed inside GID */
183 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) ||
184 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) {
195 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
196 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
198 if (ipv6_addr_v4mapped((const struct in6_addr *)gid)) {
199 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
200 memset(out_in, 0, sizeof(*out_in));
201 out_in->sin_len = sizeof(*out_in);
202 out_in->sin_family = AF_INET;
203 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
205 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
206 memset(out_in, 0, sizeof(*out_in));
207 out_in->sin6_len = sizeof(*out_in);
208 out_in->sin6_family = AF_INET6;
209 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
213 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
216 struct net_device *dev;
219 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
221 TAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) {
222 if (ifa->ifa_addr == NULL ||
223 ifa->ifa_addr->sa_family != AF_INET)
225 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
226 ifa->ifa_addr)->sin_addr.s_addr,
227 (struct in6_addr *)gid);
234 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
236 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
237 dev_addr->dev_type != ARPHRD_INFINIBAND)
238 iboe_addr_get_sgid(dev_addr, gid);
240 memcpy(gid, dev_addr->src_dev_addr +
241 rdma_addr_gid_offset(dev_addr), sizeof *gid);
244 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
246 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
249 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
251 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
254 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
256 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
259 static inline enum ib_mtu iboe_get_mtu(int mtu)
262 * reduce IB headers from effective IBoE MTU. 28 stands for
263 * atomic header which is the biggest possible header after BTH
265 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
267 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
269 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
271 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
273 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
275 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
281 static inline int iboe_get_rate(struct net_device *dev)
283 uint64_t baudrate = dev->if_baudrate;
284 #ifdef if_baudrate_pf
286 for (exp = dev->if_baudrate_pf; exp > 0; exp--)
289 if (baudrate >= IF_Gbps(40))
290 return IB_RATE_40_GBPS;
291 else if (baudrate >= IF_Gbps(30))
292 return IB_RATE_30_GBPS;
293 else if (baudrate >= IF_Gbps(20))
294 return IB_RATE_20_GBPS;
295 else if (baudrate >= IF_Gbps(10))
296 return IB_RATE_10_GBPS;
298 return IB_RATE_PORT_CURRENT;
301 static inline int rdma_link_local_addr(struct in6_addr *addr)
303 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
304 addr->s6_addr32[1] == 0)
310 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
312 memcpy(mac, &addr->s6_addr[8], 3);
313 memcpy(mac + 3, &addr->s6_addr[13], 3);
317 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
319 return addr->s6_addr[0] == 0xff;
322 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
328 for (i = 2; i < 6; ++i)
329 mac[i] = addr->s6_addr[i + 10];
332 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
336 vid = dgid->raw[11] << 8 | dgid->raw[12];
337 return vid < 0x1000 ? vid : 0xffff;
340 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
342 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev));
345 #endif /* IB_ADDR_H */