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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 | 40 | #include <linux/netdevice.h> |
7b85627b | 41 | #include <linux/inetdevice.h> |
7025fcd3 | 42 | #include <linux/socket.h> |
af7bd463 | 43 | #include <linux/if_vlan.h> |
7b85627b MS |
44 | #include <net/ipv6.h> |
45 | #include <net/if_inet6.h> | |
46 | #include <net/ip.h> | |
7025fcd3 | 47 | #include <rdma/ib_verbs.h> |
3c86aa70 | 48 | #include <rdma/ib_pack.h> |
dd5f03be | 49 | #include <net/ipv6.h> |
565edd1d | 50 | #include <net/net_namespace.h> |
7025fcd3 | 51 | |
7a118df3 SH |
52 | struct rdma_addr_client { |
53 | atomic_t refcount; | |
54 | struct completion comp; | |
55 | }; | |
56 | ||
57 | /** | |
58 | * rdma_addr_register_client - Register an address client. | |
59 | */ | |
60 | void 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 | */ | |
66 | void rdma_addr_unregister_client(struct rdma_addr_client *client); | |
67 | ||
565edd1d GS |
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 | */ | |
7025fcd3 SH |
78 | struct 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]; | |
c4315d85 | 82 | unsigned short dev_type; |
6266ed6e | 83 | int bound_dev_if; |
3c86aa70 | 84 | enum rdma_transport_type transport; |
565edd1d | 85 | struct net *net; |
c865f246 | 86 | enum rdma_network_type network; |
c3efe750 | 87 | int hoplimit; |
7025fcd3 SH |
88 | }; |
89 | ||
90 | /** | |
91 | * rdma_translate_ip - Translate a local IP address to an RDMA hardware | |
92 | * address. | |
565edd1d GS |
93 | * |
94 | * The dev_addr->net field must be initialized. | |
7025fcd3 | 95 | */ |
20029832 MB |
96 | int rdma_translate_ip(const struct sockaddr *addr, |
97 | struct rdma_dev_addr *dev_addr, u16 *vlan_id); | |
7025fcd3 SH |
98 | |
99 | /** | |
100 | * rdma_resolve_ip - Resolve source and destination IP addresses to | |
101 | * RDMA hardware addresses. | |
7a118df3 | 102 | * @client: Address client associated with request. |
7025fcd3 SH |
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 | |
565edd1d | 109 | * been invoked. The net field of the addr struct must be valid. |
7025fcd3 SH |
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 | */ | |
7a118df3 SH |
115 | int rdma_resolve_ip(struct rdma_addr_client *client, |
116 | struct sockaddr *src_addr, struct sockaddr *dst_addr, | |
7025fcd3 SH |
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 | ||
20029832 MB |
122 | int rdma_resolve_ip_route(struct sockaddr *src_addr, |
123 | const struct sockaddr *dst_addr, | |
124 | struct rdma_dev_addr *addr); | |
125 | ||
7025fcd3 SH |
126 | void rdma_addr_cancel(struct rdma_dev_addr *addr); |
127 | ||
07ebafba TT |
128 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
129 | const unsigned char *dst_dev_addr); | |
130 | ||
ef560861 | 131 | int rdma_addr_size(struct sockaddr *addr); |
7025fcd3 | 132 | |
dd5f03be | 133 | int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); |
f7f4b23e MB |
134 | int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, |
135 | const union ib_gid *dgid, | |
c3efe750 MB |
136 | u8 *smac, u16 *vlan_id, int *if_index, |
137 | int *hoplimit); | |
dd5f03be | 138 | |
7025fcd3 SH |
139 | static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) |
140 | { | |
141 | return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; | |
142 | } | |
143 | ||
144 | static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) | |
145 | { | |
146 | dev_addr->broadcast[8] = pkey >> 8; | |
147 | dev_addr->broadcast[9] = (unsigned char) pkey; | |
148 | } | |
149 | ||
faec2f7b SH |
150 | static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, |
151 | union ib_gid *gid) | |
152 | { | |
153 | memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); | |
154 | } | |
155 | ||
6f8372b6 | 156 | static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
7025fcd3 | 157 | { |
6f8372b6 | 158 | return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
7025fcd3 SH |
159 | } |
160 | ||
7b85627b | 161 | static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) |
3c86aa70 | 162 | { |
d0d7b10b | 163 | return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; |
3c86aa70 EC |
164 | } |
165 | ||
dd5f03be MB |
166 | static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) |
167 | { | |
168 | switch (addr->sa_family) { | |
169 | case AF_INET: | |
170 | ipv6_addr_set_v4mapped(((struct sockaddr_in *) | |
171 | addr)->sin_addr.s_addr, | |
172 | (struct in6_addr *)gid); | |
173 | break; | |
174 | case AF_INET6: | |
175 | memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); | |
176 | break; | |
177 | default: | |
178 | return -EINVAL; | |
179 | } | |
180 | return 0; | |
181 | } | |
182 | ||
183 | /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ | |
73cdaaee | 184 | static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) |
dd5f03be MB |
185 | { |
186 | if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { | |
187 | struct sockaddr_in *out_in = (struct sockaddr_in *)out; | |
188 | memset(out_in, 0, sizeof(*out_in)); | |
189 | out_in->sin_family = AF_INET; | |
190 | memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); | |
191 | } else { | |
192 | struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; | |
193 | memset(out_in, 0, sizeof(*out_in)); | |
194 | out_in->sin6_family = AF_INET6; | |
195 | memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); | |
196 | } | |
dd5f03be MB |
197 | } |
198 | ||
3c86aa70 EC |
199 | static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, |
200 | union ib_gid *gid) | |
201 | { | |
af7bd463 | 202 | struct net_device *dev; |
7b85627b | 203 | struct in_device *ip4; |
af7bd463 EC |
204 | |
205 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); | |
206 | if (dev) { | |
fba332b0 BVA |
207 | ip4 = in_dev_get(dev); |
208 | if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) { | |
7b85627b MS |
209 | ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, |
210 | (struct in6_addr *)gid); | |
fba332b0 BVA |
211 | in_dev_put(ip4); |
212 | } | |
af7bd463 EC |
213 | dev_put(dev); |
214 | } | |
3c86aa70 EC |
215 | } |
216 | ||
6f8372b6 | 217 | static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 218 | { |
3c86aa70 EC |
219 | if (dev_addr->transport == RDMA_TRANSPORT_IB && |
220 | dev_addr->dev_type != ARPHRD_INFINIBAND) | |
221 | iboe_addr_get_sgid(dev_addr, gid); | |
222 | else | |
223 | memcpy(gid, dev_addr->src_dev_addr + | |
224 | rdma_addr_gid_offset(dev_addr), sizeof *gid); | |
7025fcd3 SH |
225 | } |
226 | ||
6f8372b6 | 227 | static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 228 | { |
6f8372b6 | 229 | memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
7025fcd3 SH |
230 | } |
231 | ||
6f8372b6 | 232 | static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 233 | { |
6f8372b6 | 234 | memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
7025fcd3 SH |
235 | } |
236 | ||
6f8372b6 | 237 | static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
07ebafba | 238 | { |
6f8372b6 | 239 | memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
07ebafba TT |
240 | } |
241 | ||
3c86aa70 EC |
242 | static inline enum ib_mtu iboe_get_mtu(int mtu) |
243 | { | |
244 | /* | |
245 | * reduce IB headers from effective IBoE MTU. 28 stands for | |
246 | * atomic header which is the biggest possible header after BTH | |
247 | */ | |
248 | mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; | |
249 | ||
250 | if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) | |
251 | return IB_MTU_4096; | |
252 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) | |
253 | return IB_MTU_2048; | |
254 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) | |
255 | return IB_MTU_1024; | |
256 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) | |
257 | return IB_MTU_512; | |
258 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) | |
259 | return IB_MTU_256; | |
260 | else | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static inline int iboe_get_rate(struct net_device *dev) | |
265 | { | |
17605b96 | 266 | struct ethtool_link_ksettings cmd; |
4bc71cb9 | 267 | int err; |
3c86aa70 | 268 | |
4bc71cb9 | 269 | rtnl_lock(); |
17605b96 | 270 | err = __ethtool_get_link_ksettings(dev, &cmd); |
4bc71cb9 JP |
271 | rtnl_unlock(); |
272 | if (err) | |
3c86aa70 EC |
273 | return IB_RATE_PORT_CURRENT; |
274 | ||
17605b96 | 275 | if (cmd.base.speed >= 40000) |
3c86aa70 | 276 | return IB_RATE_40_GBPS; |
17605b96 | 277 | else if (cmd.base.speed >= 30000) |
3c86aa70 | 278 | return IB_RATE_30_GBPS; |
17605b96 | 279 | else if (cmd.base.speed >= 20000) |
3c86aa70 | 280 | return IB_RATE_20_GBPS; |
17605b96 | 281 | else if (cmd.base.speed >= 10000) |
3c86aa70 EC |
282 | return IB_RATE_10_GBPS; |
283 | else | |
284 | return IB_RATE_PORT_CURRENT; | |
285 | } | |
286 | ||
287 | static inline int rdma_link_local_addr(struct in6_addr *addr) | |
288 | { | |
289 | if (addr->s6_addr32[0] == htonl(0xfe800000) && | |
290 | addr->s6_addr32[1] == 0) | |
291 | return 1; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) | |
297 | { | |
298 | memcpy(mac, &addr->s6_addr[8], 3); | |
299 | memcpy(mac + 3, &addr->s6_addr[13], 3); | |
300 | mac[0] ^= 2; | |
301 | } | |
302 | ||
303 | static inline int rdma_is_multicast_addr(struct in6_addr *addr) | |
304 | { | |
305 | return addr->s6_addr[0] == 0xff; | |
306 | } | |
307 | ||
308 | static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) | |
309 | { | |
310 | int i; | |
311 | ||
312 | mac[0] = 0x33; | |
313 | mac[1] = 0x33; | |
314 | for (i = 2; i < 6; ++i) | |
315 | mac[i] = addr->s6_addr[i + 10]; | |
316 | } | |
317 | ||
af7bd463 EC |
318 | static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
319 | { | |
320 | u16 vid; | |
321 | ||
322 | vid = dgid->raw[11] << 8 | dgid->raw[12]; | |
323 | return vid < 0x1000 ? vid : 0xffff; | |
324 | } | |
325 | ||
326 | static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) | |
327 | { | |
d0d7b10b | 328 | return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; |
af7bd463 EC |
329 | } |
330 | ||
7025fcd3 | 331 | #endif /* IB_ADDR_H */ |