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1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2/*
3 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
4 * Copyright (c) 2005 Intel Corporation. All rights reserved.
5 */
6
7#ifndef IB_ADDR_H
8#define IB_ADDR_H
9
10#include <linux/ethtool.h>
11#include <linux/in.h>
12#include <linux/in6.h>
13#include <linux/if_arp.h>
14#include <linux/netdevice.h>
15#include <linux/inetdevice.h>
16#include <linux/socket.h>
17#include <linux/if_vlan.h>
18#include <net/ipv6.h>
19#include <net/if_inet6.h>
20#include <net/ip.h>
21#include <rdma/ib_verbs.h>
22#include <rdma/ib_pack.h>
23#include <net/net_namespace.h>
24
25/**
26 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
27 * @src_dev_addr: Source MAC address.
28 * @dst_dev_addr: Destination MAC address.
29 * @broadcast: Broadcast address of the device.
30 * @dev_type: The interface hardware type of the device.
31 * @bound_dev_if: An optional device interface index.
32 * @transport: The transport type used.
33 * @net: Network namespace containing the bound_dev_if net_dev.
34 * @sgid_attr: GID attribute to use for identified SGID
35 */
36struct rdma_dev_addr {
37 unsigned char src_dev_addr[MAX_ADDR_LEN];
38 unsigned char dst_dev_addr[MAX_ADDR_LEN];
39 unsigned char broadcast[MAX_ADDR_LEN];
40 unsigned short dev_type;
41 int bound_dev_if;
42 enum rdma_transport_type transport;
43 struct net *net;
44 const struct ib_gid_attr *sgid_attr;
45 enum rdma_network_type network;
46 int hoplimit;
47};
48
49/**
50 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
51 * address.
52 *
53 * The dev_addr->net field must be initialized.
54 */
55int rdma_translate_ip(const struct sockaddr *addr,
56 struct rdma_dev_addr *dev_addr);
57
58/**
59 * rdma_resolve_ip - Resolve source and destination IP addresses to
60 * RDMA hardware addresses.
61 * @src_addr: An optional source address to use in the resolution. If a
62 * source address is not provided, a usable address will be returned via
63 * the callback.
64 * @dst_addr: The destination address to resolve.
65 * @addr: A reference to a data location that will receive the resolved
66 * addresses. The data location must remain valid until the callback has
67 * been invoked. The net field of the addr struct must be valid.
68 * @timeout_ms: Amount of time to wait for the address resolution to complete.
69 * @callback: Call invoked once address resolution has completed, timed out,
70 * or been canceled. A status of 0 indicates success.
71 * @resolve_by_gid_attr: Resolve the ip based on the GID attribute from
72 * rdma_dev_addr.
73 * @context: User-specified context associated with the call.
74 */
75int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
76 struct rdma_dev_addr *addr, unsigned long timeout_ms,
77 void (*callback)(int status, struct sockaddr *src_addr,
78 struct rdma_dev_addr *addr, void *context),
79 bool resolve_by_gid_attr, void *context);
80
81void rdma_addr_cancel(struct rdma_dev_addr *addr);
82
83int rdma_addr_size(const struct sockaddr *addr);
84int rdma_addr_size_in6(struct sockaddr_in6 *addr);
85int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
86
87static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
88{
89 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
90}
91
92static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
93{
94 dev_addr->broadcast[8] = pkey >> 8;
95 dev_addr->broadcast[9] = (unsigned char) pkey;
96}
97
98static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
99 union ib_gid *gid)
100{
101 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
102}
103
104static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
105{
106 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
107}
108
109static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
110{
111 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
112}
113
114static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
115{
116 switch (addr->sa_family) {
117 case AF_INET:
118 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
119 addr)->sin_addr.s_addr,
120 (struct in6_addr *)gid);
121 break;
122 case AF_INET6:
123 *(struct in6_addr *)&gid->raw =
124 ((struct sockaddr_in6 *)addr)->sin6_addr;
125 break;
126 default:
127 return -EINVAL;
128 }
129 return 0;
130}
131
132/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
133static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
134{
135 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
136 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
137 memset(out_in, 0, sizeof(*out_in));
138 out_in->sin_family = AF_INET;
139 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
140 } else {
141 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
142 memset(out_in, 0, sizeof(*out_in));
143 out_in->sin6_family = AF_INET6;
144 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
145 }
146}
147
148/*
149 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
150 * They are not applicable to RoCE.
151 * RoCE GIDs are derived from the IP addresses.
152 */
153static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
154{
155 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
156 sizeof(*gid));
157}
158
159static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
160{
161 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
162}
163
164static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
165{
166 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
167}
168
169static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
170{
171 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
172}
173
174static inline enum ib_mtu iboe_get_mtu(int mtu)
175{
176 /*
177 * Reduce IB headers from effective IBoE MTU.
178 */
179 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
180 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
181 IB_ICRC_BYTES);
182
183 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
184 return IB_MTU_4096;
185 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
186 return IB_MTU_2048;
187 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
188 return IB_MTU_1024;
189 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
190 return IB_MTU_512;
191 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
192 return IB_MTU_256;
193 else
194 return 0;
195}
196
197static inline int iboe_get_rate(struct net_device *dev)
198{
199 struct ethtool_link_ksettings cmd;
200 int err;
201
202 rtnl_lock();
203 err = __ethtool_get_link_ksettings(dev, &cmd);
204 rtnl_unlock();
205 if (err)
206 return IB_RATE_PORT_CURRENT;
207
208 if (cmd.base.speed >= 40000)
209 return IB_RATE_40_GBPS;
210 else if (cmd.base.speed >= 30000)
211 return IB_RATE_30_GBPS;
212 else if (cmd.base.speed >= 20000)
213 return IB_RATE_20_GBPS;
214 else if (cmd.base.speed >= 10000)
215 return IB_RATE_10_GBPS;
216 else
217 return IB_RATE_PORT_CURRENT;
218}
219
220static inline int rdma_link_local_addr(struct in6_addr *addr)
221{
222 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
223 addr->s6_addr32[1] == 0)
224 return 1;
225
226 return 0;
227}
228
229static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
230{
231 memcpy(mac, &addr->s6_addr[8], 3);
232 memcpy(mac + 3, &addr->s6_addr[13], 3);
233 mac[0] ^= 2;
234}
235
236static inline int rdma_is_multicast_addr(struct in6_addr *addr)
237{
238 __be32 ipv4_addr;
239
240 if (addr->s6_addr[0] == 0xff)
241 return 1;
242
243 ipv4_addr = addr->s6_addr32[3];
244 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
245}
246
247static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
248{
249 int i;
250
251 mac[0] = 0x33;
252 mac[1] = 0x33;
253 for (i = 2; i < 6; ++i)
254 mac[i] = addr->s6_addr[i + 10];
255}
256
257static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
258{
259 u16 vid;
260
261 vid = dgid->raw[11] << 8 | dgid->raw[12];
262 return vid < 0x1000 ? vid : 0xffff;
263}
264
265static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
266{
267 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
268}
269
270#endif /* IB_ADDR_H */
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/inetdevice.h>
42#include <linux/socket.h>
43#include <linux/if_vlan.h>
44#include <net/ipv6.h>
45#include <net/if_inet6.h>
46#include <net/ip.h>
47#include <rdma/ib_verbs.h>
48#include <rdma/ib_pack.h>
49#include <net/ipv6.h>
50#include <net/net_namespace.h>
51
52struct rdma_addr_client {
53 atomic_t refcount;
54 struct completion comp;
55};
56
57/**
58 * rdma_addr_register_client - Register an address client.
59 */
60void rdma_addr_register_client(struct rdma_addr_client *client);
61
62/**
63 * rdma_addr_unregister_client - Deregister an address client.
64 * @client: Client object to deregister.
65 */
66void rdma_addr_unregister_client(struct rdma_addr_client *client);
67
68/**
69 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
70 * @src_dev_addr: Source MAC address.
71 * @dst_dev_addr: Destination MAC address.
72 * @broadcast: Broadcast address of the device.
73 * @dev_type: The interface hardware type of the device.
74 * @bound_dev_if: An optional device interface index.
75 * @transport: The transport type used.
76 * @net: Network namespace containing the bound_dev_if net_dev.
77 */
78struct rdma_dev_addr {
79 unsigned char src_dev_addr[MAX_ADDR_LEN];
80 unsigned char dst_dev_addr[MAX_ADDR_LEN];
81 unsigned char broadcast[MAX_ADDR_LEN];
82 unsigned short dev_type;
83 int bound_dev_if;
84 enum rdma_transport_type transport;
85 struct net *net;
86 enum rdma_network_type network;
87 int hoplimit;
88};
89
90/**
91 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
92 * address.
93 *
94 * The dev_addr->net field must be initialized.
95 */
96int rdma_translate_ip(const struct sockaddr *addr,
97 struct rdma_dev_addr *dev_addr);
98
99/**
100 * rdma_resolve_ip - Resolve source and destination IP addresses to
101 * RDMA hardware addresses.
102 * @client: Address client associated with request.
103 * @src_addr: An optional source address to use in the resolution. If a
104 * source address is not provided, a usable address will be returned via
105 * the callback.
106 * @dst_addr: The destination address to resolve.
107 * @addr: A reference to a data location that will receive the resolved
108 * addresses. The data location must remain valid until the callback has
109 * been invoked. The net field of the addr struct must be valid.
110 * @timeout_ms: Amount of time to wait for the address resolution to complete.
111 * @callback: Call invoked once address resolution has completed, timed out,
112 * or been canceled. A status of 0 indicates success.
113 * @context: User-specified context associated with the call.
114 */
115int rdma_resolve_ip(struct rdma_addr_client *client,
116 struct sockaddr *src_addr, struct sockaddr *dst_addr,
117 struct rdma_dev_addr *addr, int timeout_ms,
118 void (*callback)(int status, struct sockaddr *src_addr,
119 struct rdma_dev_addr *addr, void *context),
120 void *context);
121
122void rdma_addr_cancel(struct rdma_dev_addr *addr);
123
124void rdma_copy_addr(struct rdma_dev_addr *dev_addr,
125 const struct net_device *dev,
126 const unsigned char *dst_dev_addr);
127
128int rdma_addr_size(struct sockaddr *addr);
129int rdma_addr_size_in6(struct sockaddr_in6 *addr);
130int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
131
132static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
133{
134 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
135}
136
137static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
138{
139 dev_addr->broadcast[8] = pkey >> 8;
140 dev_addr->broadcast[9] = (unsigned char) pkey;
141}
142
143static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
144 union ib_gid *gid)
145{
146 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
147}
148
149static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
150{
151 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
152}
153
154static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
155{
156 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
157}
158
159static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
160{
161 switch (addr->sa_family) {
162 case AF_INET:
163 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
164 addr)->sin_addr.s_addr,
165 (struct in6_addr *)gid);
166 break;
167 case AF_INET6:
168 *(struct in6_addr *)&gid->raw =
169 ((struct sockaddr_in6 *)addr)->sin6_addr;
170 break;
171 default:
172 return -EINVAL;
173 }
174 return 0;
175}
176
177/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
178static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
179{
180 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
181 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
182 memset(out_in, 0, sizeof(*out_in));
183 out_in->sin_family = AF_INET;
184 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
185 } else {
186 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
187 memset(out_in, 0, sizeof(*out_in));
188 out_in->sin6_family = AF_INET6;
189 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
190 }
191}
192
193/*
194 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
195 * They are not applicable to RoCE.
196 * RoCE GIDs are derived from the IP addresses.
197 */
198static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
199{
200 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
201 sizeof(*gid));
202}
203
204static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
205{
206 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
207}
208
209static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
210{
211 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
212}
213
214static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
215{
216 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
217}
218
219static inline enum ib_mtu iboe_get_mtu(int mtu)
220{
221 /*
222 * Reduce IB headers from effective IBoE MTU.
223 */
224 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
225 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
226 IB_ICRC_BYTES);
227
228 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
229 return IB_MTU_4096;
230 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
231 return IB_MTU_2048;
232 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
233 return IB_MTU_1024;
234 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
235 return IB_MTU_512;
236 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
237 return IB_MTU_256;
238 else
239 return 0;
240}
241
242static inline int iboe_get_rate(struct net_device *dev)
243{
244 struct ethtool_link_ksettings cmd;
245 int err;
246
247 rtnl_lock();
248 err = __ethtool_get_link_ksettings(dev, &cmd);
249 rtnl_unlock();
250 if (err)
251 return IB_RATE_PORT_CURRENT;
252
253 if (cmd.base.speed >= 40000)
254 return IB_RATE_40_GBPS;
255 else if (cmd.base.speed >= 30000)
256 return IB_RATE_30_GBPS;
257 else if (cmd.base.speed >= 20000)
258 return IB_RATE_20_GBPS;
259 else if (cmd.base.speed >= 10000)
260 return IB_RATE_10_GBPS;
261 else
262 return IB_RATE_PORT_CURRENT;
263}
264
265static inline int rdma_link_local_addr(struct in6_addr *addr)
266{
267 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
268 addr->s6_addr32[1] == 0)
269 return 1;
270
271 return 0;
272}
273
274static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
275{
276 memcpy(mac, &addr->s6_addr[8], 3);
277 memcpy(mac + 3, &addr->s6_addr[13], 3);
278 mac[0] ^= 2;
279}
280
281static inline int rdma_is_multicast_addr(struct in6_addr *addr)
282{
283 __be32 ipv4_addr;
284
285 if (addr->s6_addr[0] == 0xff)
286 return 1;
287
288 ipv4_addr = addr->s6_addr32[3];
289 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
290}
291
292static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
293{
294 int i;
295
296 mac[0] = 0x33;
297 mac[1] = 0x33;
298 for (i = 2; i < 6; ++i)
299 mac[i] = addr->s6_addr[i + 10];
300}
301
302static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
303{
304 u16 vid;
305
306 vid = dgid->raw[11] << 8 | dgid->raw[12];
307 return vid < 0x1000 ? vid : 0xffff;
308}
309
310static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
311{
312 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
313}
314
315#endif /* IB_ADDR_H */