1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
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/net_namespace.h>
50
51
52
53
54
55
56
57
58
59
60
61
62struct 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 struct net *net;
70 const struct ib_gid_attr *sgid_attr;
71 enum rdma_network_type network;
72 int hoplimit;
73};
74
75
76
77
78
79
80
81int rdma_translate_ip(const struct sockaddr *addr,
82 struct rdma_dev_addr *dev_addr);
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
102 struct rdma_dev_addr *addr, unsigned long timeout_ms,
103 void (*callback)(int status, struct sockaddr *src_addr,
104 struct rdma_dev_addr *addr, void *context),
105 bool resolve_by_gid_attr, void *context);
106
107void rdma_addr_cancel(struct rdma_dev_addr *addr);
108
109int rdma_addr_size(const struct sockaddr *addr);
110int rdma_addr_size_in6(struct sockaddr_in6 *addr);
111int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
112
113static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
114{
115 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
116}
117
118static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
119{
120 dev_addr->broadcast[8] = pkey >> 8;
121 dev_addr->broadcast[9] = (unsigned char) pkey;
122}
123
124static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
125 union ib_gid *gid)
126{
127 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
128}
129
130static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
131{
132 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
133}
134
135static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
136{
137 return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
138}
139
140static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
141{
142 switch (addr->sa_family) {
143 case AF_INET:
144 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
145 addr)->sin_addr.s_addr,
146 (struct in6_addr *)gid);
147 break;
148 case AF_INET6:
149 *(struct in6_addr *)&gid->raw =
150 ((struct sockaddr_in6 *)addr)->sin6_addr;
151 break;
152 default:
153 return -EINVAL;
154 }
155 return 0;
156}
157
158
159static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
160{
161 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
162 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
163 memset(out_in, 0, sizeof(*out_in));
164 out_in->sin_family = AF_INET;
165 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
166 } else {
167 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
168 memset(out_in, 0, sizeof(*out_in));
169 out_in->sin6_family = AF_INET6;
170 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
171 }
172}
173
174
175
176
177
178
179static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
180{
181 memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
182 sizeof(*gid));
183}
184
185static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
186{
187 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
188}
189
190static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
191{
192 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
193}
194
195static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
196{
197 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
198}
199
200static inline enum ib_mtu iboe_get_mtu(int mtu)
201{
202
203
204
205 mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
206 IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
207 IB_ICRC_BYTES);
208
209 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
210 return IB_MTU_4096;
211 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
212 return IB_MTU_2048;
213 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
214 return IB_MTU_1024;
215 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
216 return IB_MTU_512;
217 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
218 return IB_MTU_256;
219 else
220 return 0;
221}
222
223static inline int iboe_get_rate(struct net_device *dev)
224{
225 struct ethtool_link_ksettings cmd;
226 int err;
227
228 rtnl_lock();
229 err = __ethtool_get_link_ksettings(dev, &cmd);
230 rtnl_unlock();
231 if (err)
232 return IB_RATE_PORT_CURRENT;
233
234 if (cmd.base.speed >= 40000)
235 return IB_RATE_40_GBPS;
236 else if (cmd.base.speed >= 30000)
237 return IB_RATE_30_GBPS;
238 else if (cmd.base.speed >= 20000)
239 return IB_RATE_20_GBPS;
240 else if (cmd.base.speed >= 10000)
241 return IB_RATE_10_GBPS;
242 else
243 return IB_RATE_PORT_CURRENT;
244}
245
246static inline int rdma_link_local_addr(struct in6_addr *addr)
247{
248 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
249 addr->s6_addr32[1] == 0)
250 return 1;
251
252 return 0;
253}
254
255static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
256{
257 memcpy(mac, &addr->s6_addr[8], 3);
258 memcpy(mac + 3, &addr->s6_addr[13], 3);
259 mac[0] ^= 2;
260}
261
262static inline int rdma_is_multicast_addr(struct in6_addr *addr)
263{
264 __be32 ipv4_addr;
265
266 if (addr->s6_addr[0] == 0xff)
267 return 1;
268
269 ipv4_addr = addr->s6_addr32[3];
270 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
271}
272
273static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
274{
275 int i;
276
277 mac[0] = 0x33;
278 mac[1] = 0x33;
279 for (i = 2; i < 6; ++i)
280 mac[i] = addr->s6_addr[i + 10];
281}
282
283static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
284{
285 u16 vid;
286
287 vid = dgid->raw[11] << 8 | dgid->raw[12];
288 return vid < 0x1000 ? vid : 0xffff;
289}
290
291static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
292{
293 return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
294}
295
296#endif
297