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7025fcd3 SH |
1 | /* |
2 | * Copyright (c) 2005 Voltaire Inc. All rights reserved. | |
3 | * Copyright (c) 2005 Intel Corporation. All rights reserved. | |
4 | * | |
a9474917 SH |
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. | |
7025fcd3 SH |
32 | */ |
33 | ||
34 | #if !defined(IB_ADDR_H) | |
35 | #define IB_ADDR_H | |
36 | ||
37 | #include <linux/in.h> | |
38 | #include <linux/in6.h> | |
c4315d85 | 39 | #include <linux/if_arp.h> |
7025fcd3 SH |
40 | #include <linux/netdevice.h> |
41 | #include <linux/socket.h> | |
af7bd463 | 42 | #include <linux/if_vlan.h> |
7025fcd3 | 43 | #include <rdma/ib_verbs.h> |
3c86aa70 | 44 | #include <rdma/ib_pack.h> |
7025fcd3 | 45 | |
7a118df3 SH |
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 | ||
7025fcd3 SH |
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]; | |
c4315d85 | 66 | unsigned short dev_type; |
6266ed6e | 67 | int bound_dev_if; |
3c86aa70 | 68 | enum rdma_transport_type transport; |
7025fcd3 SH |
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. | |
7a118df3 | 80 | * @client: Address client associated with request. |
7025fcd3 SH |
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 | */ | |
7a118df3 SH |
93 | int rdma_resolve_ip(struct rdma_addr_client *client, |
94 | struct sockaddr *src_addr, struct sockaddr *dst_addr, | |
7025fcd3 SH |
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 | ||
07ebafba TT |
102 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
103 | const unsigned char *dst_dev_addr); | |
104 | ||
7025fcd3 SH |
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 | ||
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 | ||
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 | ||
faec2f7b SH |
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 | ||
6f8372b6 | 128 | static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
7025fcd3 | 129 | { |
6f8372b6 | 130 | return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
7025fcd3 SH |
131 | } |
132 | ||
af7bd463 | 133 | static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid) |
3c86aa70 EC |
134 | { |
135 | memset(gid->raw, 0, 16); | |
136 | *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000); | |
af7bd463 EC |
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 | } | |
3c86aa70 EC |
144 | memcpy(gid->raw + 13, mac + 3, 3); |
145 | memcpy(gid->raw + 8, mac, 3); | |
146 | gid->raw[8] ^= 2; | |
147 | } | |
148 | ||
af7bd463 EC |
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 | ||
3c86aa70 EC |
155 | static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, |
156 | union ib_gid *gid) | |
157 | { | |
af7bd463 EC |
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); | |
3c86aa70 EC |
168 | } |
169 | ||
6f8372b6 | 170 | static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 171 | { |
3c86aa70 EC |
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); | |
7025fcd3 SH |
178 | } |
179 | ||
6f8372b6 | 180 | static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 181 | { |
6f8372b6 | 182 | memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
7025fcd3 SH |
183 | } |
184 | ||
6f8372b6 | 185 | static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 186 | { |
6f8372b6 | 187 | memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
7025fcd3 SH |
188 | } |
189 | ||
6f8372b6 | 190 | static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
07ebafba | 191 | { |
6f8372b6 | 192 | memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
07ebafba TT |
193 | } |
194 | ||
3c86aa70 EC |
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 | ||
217 | static inline int iboe_get_rate(struct net_device *dev) | |
218 | { | |
219 | struct ethtool_cmd cmd; | |
220 | ||
221 | if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings || | |
222 | dev->ethtool_ops->get_settings(dev, &cmd)) | |
223 | return IB_RATE_PORT_CURRENT; | |
224 | ||
225 | if (cmd.speed >= 40000) | |
226 | return IB_RATE_40_GBPS; | |
227 | else if (cmd.speed >= 30000) | |
228 | return IB_RATE_30_GBPS; | |
229 | else if (cmd.speed >= 20000) | |
230 | return IB_RATE_20_GBPS; | |
231 | else if (cmd.speed >= 10000) | |
232 | return IB_RATE_10_GBPS; | |
233 | else | |
234 | return IB_RATE_PORT_CURRENT; | |
235 | } | |
236 | ||
237 | static inline int rdma_link_local_addr(struct in6_addr *addr) | |
238 | { | |
239 | if (addr->s6_addr32[0] == htonl(0xfe800000) && | |
240 | addr->s6_addr32[1] == 0) | |
241 | return 1; | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) | |
247 | { | |
248 | memcpy(mac, &addr->s6_addr[8], 3); | |
249 | memcpy(mac + 3, &addr->s6_addr[13], 3); | |
250 | mac[0] ^= 2; | |
251 | } | |
252 | ||
253 | static inline int rdma_is_multicast_addr(struct in6_addr *addr) | |
254 | { | |
255 | return addr->s6_addr[0] == 0xff; | |
256 | } | |
257 | ||
258 | static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) | |
259 | { | |
260 | int i; | |
261 | ||
262 | mac[0] = 0x33; | |
263 | mac[1] = 0x33; | |
264 | for (i = 2; i < 6; ++i) | |
265 | mac[i] = addr->s6_addr[i + 10]; | |
266 | } | |
267 | ||
af7bd463 EC |
268 | static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
269 | { | |
270 | u16 vid; | |
271 | ||
272 | vid = dgid->raw[11] << 8 | dgid->raw[12]; | |
273 | return vid < 0x1000 ? vid : 0xffff; | |
274 | } | |
275 | ||
276 | static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) | |
277 | { | |
278 | return dev->priv_flags & IFF_802_1Q_VLAN ? | |
279 | vlan_dev_real_dev(dev) : 0; | |
280 | } | |
281 | ||
7025fcd3 | 282 | #endif /* IB_ADDR_H */ |