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 <linux/if_vlan.h>
43 #include <rdma/ib_verbs.h>
44 #include <rdma/ib_pack.h>
45
46 struct rdma_addr_client {
47 atomic_t refcount;
48 struct completion comp;
49 };
50
51 /**
52 * rdma_addr_register_client - Register an address client.
53 */
54 void rdma_addr_register_client(struct rdma_addr_client *client);
55
56 /**
57 * rdma_addr_unregister_client - Deregister an address client.
58 * @client: Client object to deregister.
59 */
60 void rdma_addr_unregister_client(struct rdma_addr_client *client);
61
62 struct rdma_dev_addr {
63 unsigned char src_dev_addr[MAX_ADDR_LEN];
64 unsigned char dst_dev_addr[MAX_ADDR_LEN];
65 unsigned char broadcast[MAX_ADDR_LEN];
66 unsigned short dev_type;
67 int bound_dev_if;
68 enum rdma_transport_type transport;
69 };
70
71 /**
72 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
73 * address.
74 */
75 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
76
77 /**
78 * rdma_resolve_ip - Resolve source and destination IP addresses to
79 * RDMA hardware addresses.
80 * @client: Address client associated with request.
81 * @src_addr: An optional source address to use in the resolution. If a
82 * source address is not provided, a usable address will be returned via
83 * the callback.
84 * @dst_addr: The destination address to resolve.
85 * @addr: A reference to a data location that will receive the resolved
86 * addresses. The data location must remain valid until the callback has
87 * been invoked.
88 * @timeout_ms: Amount of time to wait for the address resolution to complete.
89 * @callback: Call invoked once address resolution has completed, timed out,
90 * or been canceled. A status of 0 indicates success.
91 * @context: User-specified context associated with the call.
92 */
93 int rdma_resolve_ip(struct rdma_addr_client *client,
94 struct sockaddr *src_addr, struct sockaddr *dst_addr,
95 struct rdma_dev_addr *addr, int timeout_ms,
96 void (*callback)(int status, struct sockaddr *src_addr,
97 struct rdma_dev_addr *addr, void *context),
98 void *context);
99
100 void rdma_addr_cancel(struct rdma_dev_addr *addr);
101
102 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
103 const unsigned char *dst_dev_addr);
104
ip_addr_size(struct sockaddr * addr)105 static inline int ip_addr_size(struct sockaddr *addr)
106 {
107 return addr->sa_family == AF_INET6 ?
108 sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
109 }
110
ib_addr_get_pkey(struct rdma_dev_addr * dev_addr)111 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
112 {
113 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
114 }
115
ib_addr_set_pkey(struct rdma_dev_addr * dev_addr,u16 pkey)116 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
117 {
118 dev_addr->broadcast[8] = pkey >> 8;
119 dev_addr->broadcast[9] = (unsigned char) pkey;
120 }
121
ib_addr_get_mgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)122 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
123 union ib_gid *gid)
124 {
125 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
126 }
127
rdma_addr_gid_offset(struct rdma_dev_addr * dev_addr)128 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
129 {
130 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
131 }
132
iboe_mac_vlan_to_ll(union ib_gid * gid,u8 * mac,u16 vid)133 static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid)
134 {
135 memset(gid->raw, 0, 16);
136 *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000);
137 if (vid < 0x1000) {
138 gid->raw[12] = vid & 0xff;
139 gid->raw[11] = vid >> 8;
140 } else {
141 gid->raw[12] = 0xfe;
142 gid->raw[11] = 0xff;
143 }
144 memcpy(gid->raw + 13, mac + 3, 3);
145 memcpy(gid->raw + 8, mac, 3);
146 gid->raw[8] ^= 2;
147 }
148
rdma_vlan_dev_vlan_id(const struct net_device * dev)149 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
150 {
151 return dev->priv_flags & IFF_802_1Q_VLAN ?
152 vlan_dev_vlan_id(dev) : 0xffff;
153 }
154
iboe_addr_get_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)155 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
156 union ib_gid *gid)
157 {
158 struct net_device *dev;
159 u16 vid = 0xffff;
160
161 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
162 if (dev) {
163 vid = rdma_vlan_dev_vlan_id(dev);
164 dev_put(dev);
165 }
166
167 iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid);
168 }
169
rdma_addr_get_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)170 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
171 {
172 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
173 dev_addr->dev_type != ARPHRD_INFINIBAND)
174 iboe_addr_get_sgid(dev_addr, gid);
175 else
176 memcpy(gid, dev_addr->src_dev_addr +
177 rdma_addr_gid_offset(dev_addr), sizeof *gid);
178 }
179
rdma_addr_set_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)180 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
181 {
182 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
183 }
184
rdma_addr_get_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)185 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
186 {
187 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
188 }
189
rdma_addr_set_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)190 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
191 {
192 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
193 }
194
iboe_get_mtu(int mtu)195 static inline enum ib_mtu iboe_get_mtu(int mtu)
196 {
197 /*
198 * reduce IB headers from effective IBoE MTU. 28 stands for
199 * atomic header which is the biggest possible header after BTH
200 */
201 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
202
203 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
204 return IB_MTU_4096;
205 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
206 return IB_MTU_2048;
207 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
208 return IB_MTU_1024;
209 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
210 return IB_MTU_512;
211 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
212 return IB_MTU_256;
213 else
214 return 0;
215 }
216
iboe_get_rate(struct net_device * dev)217 static inline int iboe_get_rate(struct net_device *dev)
218 {
219 struct ethtool_cmd cmd;
220 u32 speed;
221 int err;
222
223 rtnl_lock();
224 err = __ethtool_get_settings(dev, &cmd);
225 rtnl_unlock();
226 if (err)
227 return IB_RATE_PORT_CURRENT;
228
229 speed = ethtool_cmd_speed(&cmd);
230 if (speed >= 40000)
231 return IB_RATE_40_GBPS;
232 else if (speed >= 30000)
233 return IB_RATE_30_GBPS;
234 else if (speed >= 20000)
235 return IB_RATE_20_GBPS;
236 else if (speed >= 10000)
237 return IB_RATE_10_GBPS;
238 else
239 return IB_RATE_PORT_CURRENT;
240 }
241
rdma_link_local_addr(struct in6_addr * addr)242 static inline int rdma_link_local_addr(struct in6_addr *addr)
243 {
244 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
245 addr->s6_addr32[1] == 0)
246 return 1;
247
248 return 0;
249 }
250
rdma_get_ll_mac(struct in6_addr * addr,u8 * mac)251 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
252 {
253 memcpy(mac, &addr->s6_addr[8], 3);
254 memcpy(mac + 3, &addr->s6_addr[13], 3);
255 mac[0] ^= 2;
256 }
257
rdma_is_multicast_addr(struct in6_addr * addr)258 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
259 {
260 return addr->s6_addr[0] == 0xff;
261 }
262
rdma_get_mcast_mac(struct in6_addr * addr,u8 * mac)263 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
264 {
265 int i;
266
267 mac[0] = 0x33;
268 mac[1] = 0x33;
269 for (i = 2; i < 6; ++i)
270 mac[i] = addr->s6_addr[i + 10];
271 }
272
rdma_get_vlan_id(union ib_gid * dgid)273 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
274 {
275 u16 vid;
276
277 vid = dgid->raw[11] << 8 | dgid->raw[12];
278 return vid < 0x1000 ? vid : 0xffff;
279 }
280
rdma_vlan_dev_real_dev(const struct net_device * dev)281 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
282 {
283 return dev->priv_flags & IFF_802_1Q_VLAN ?
284 vlan_dev_real_dev(dev) : NULL;
285 }
286
287 #endif /* IB_ADDR_H */
288