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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> |
565edd1d | 49 | #include <net/net_namespace.h> |
7025fcd3 | 50 | |
565edd1d GS |
51 | /** |
52 | * struct rdma_dev_addr - Contains resolved RDMA hardware addresses | |
53 | * @src_dev_addr: Source MAC address. | |
54 | * @dst_dev_addr: Destination MAC address. | |
55 | * @broadcast: Broadcast address of the device. | |
56 | * @dev_type: The interface hardware type of the device. | |
57 | * @bound_dev_if: An optional device interface index. | |
58 | * @transport: The transport type used. | |
59 | * @net: Network namespace containing the bound_dev_if net_dev. | |
4ed13a5f | 60 | * @sgid_attr: GID attribute to use for identified SGID |
565edd1d | 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; |
565edd1d | 69 | struct net *net; |
4ed13a5f | 70 | const struct ib_gid_attr *sgid_attr; |
c865f246 | 71 | enum rdma_network_type network; |
c3efe750 | 72 | int hoplimit; |
7025fcd3 SH |
73 | }; |
74 | ||
75 | /** | |
76 | * rdma_translate_ip - Translate a local IP address to an RDMA hardware | |
77 | * address. | |
565edd1d GS |
78 | * |
79 | * The dev_addr->net field must be initialized. | |
7025fcd3 | 80 | */ |
20029832 | 81 | int rdma_translate_ip(const struct sockaddr *addr, |
575c7e58 | 82 | struct rdma_dev_addr *dev_addr); |
7025fcd3 SH |
83 | |
84 | /** | |
85 | * rdma_resolve_ip - Resolve source and destination IP addresses to | |
86 | * RDMA hardware addresses. | |
87 | * @src_addr: An optional source address to use in the resolution. If a | |
88 | * source address is not provided, a usable address will be returned via | |
89 | * the callback. | |
90 | * @dst_addr: The destination address to resolve. | |
91 | * @addr: A reference to a data location that will receive the resolved | |
92 | * addresses. The data location must remain valid until the callback has | |
565edd1d | 93 | * been invoked. The net field of the addr struct must be valid. |
7025fcd3 SH |
94 | * @timeout_ms: Amount of time to wait for the address resolution to complete. |
95 | * @callback: Call invoked once address resolution has completed, timed out, | |
96 | * or been canceled. A status of 0 indicates success. | |
0e9d2c19 PP |
97 | * @resolve_by_gid_attr: Resolve the ip based on the GID attribute from |
98 | * rdma_dev_addr. | |
7025fcd3 SH |
99 | * @context: User-specified context associated with the call. |
100 | */ | |
2df7dba8 | 101 | int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr, |
7025fcd3 SH |
102 | struct rdma_dev_addr *addr, int timeout_ms, |
103 | void (*callback)(int status, struct sockaddr *src_addr, | |
104 | struct rdma_dev_addr *addr, void *context), | |
0e9d2c19 | 105 | bool resolve_by_gid_attr, |
7025fcd3 SH |
106 | void *context); |
107 | ||
108 | void rdma_addr_cancel(struct rdma_dev_addr *addr); | |
109 | ||
2df7dba8 | 110 | int rdma_addr_size(const struct sockaddr *addr); |
84652aef RD |
111 | int rdma_addr_size_in6(struct sockaddr_in6 *addr); |
112 | int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr); | |
7025fcd3 SH |
113 | |
114 | static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) | |
115 | { | |
116 | return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; | |
117 | } | |
118 | ||
119 | static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) | |
120 | { | |
121 | dev_addr->broadcast[8] = pkey >> 8; | |
122 | dev_addr->broadcast[9] = (unsigned char) pkey; | |
123 | } | |
124 | ||
faec2f7b SH |
125 | static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, |
126 | union ib_gid *gid) | |
127 | { | |
128 | memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); | |
129 | } | |
130 | ||
6f8372b6 | 131 | static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
7025fcd3 | 132 | { |
6f8372b6 | 133 | return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
7025fcd3 SH |
134 | } |
135 | ||
7b85627b | 136 | static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) |
3c86aa70 | 137 | { |
d0d7b10b | 138 | return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; |
3c86aa70 EC |
139 | } |
140 | ||
dd5f03be MB |
141 | static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) |
142 | { | |
143 | switch (addr->sa_family) { | |
144 | case AF_INET: | |
145 | ipv6_addr_set_v4mapped(((struct sockaddr_in *) | |
146 | addr)->sin_addr.s_addr, | |
147 | (struct in6_addr *)gid); | |
148 | break; | |
149 | case AF_INET6: | |
5f8a4db7 AB |
150 | *(struct in6_addr *)&gid->raw = |
151 | ((struct sockaddr_in6 *)addr)->sin6_addr; | |
dd5f03be MB |
152 | break; |
153 | default: | |
154 | return -EINVAL; | |
155 | } | |
156 | return 0; | |
157 | } | |
158 | ||
159 | /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ | |
73cdaaee | 160 | static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) |
dd5f03be MB |
161 | { |
162 | if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { | |
163 | struct sockaddr_in *out_in = (struct sockaddr_in *)out; | |
164 | memset(out_in, 0, sizeof(*out_in)); | |
165 | out_in->sin_family = AF_INET; | |
166 | memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); | |
167 | } else { | |
168 | struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; | |
169 | memset(out_in, 0, sizeof(*out_in)); | |
170 | out_in->sin6_family = AF_INET6; | |
171 | memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); | |
172 | } | |
dd5f03be MB |
173 | } |
174 | ||
15cbc519 PP |
175 | /* |
176 | * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp. | |
177 | * They are not applicable to RoCE. | |
178 | * RoCE GIDs are derived from the IP addresses. | |
179 | */ | |
6f8372b6 | 180 | static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 181 | { |
15cbc519 PP |
182 | memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), |
183 | sizeof(*gid)); | |
7025fcd3 SH |
184 | } |
185 | ||
6f8372b6 | 186 | static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 187 | { |
6f8372b6 | 188 | memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
7025fcd3 SH |
189 | } |
190 | ||
6f8372b6 | 191 | static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 192 | { |
6f8372b6 | 193 | memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
7025fcd3 SH |
194 | } |
195 | ||
6f8372b6 | 196 | static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
07ebafba | 197 | { |
6f8372b6 | 198 | memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
07ebafba TT |
199 | } |
200 | ||
3c86aa70 EC |
201 | static inline enum ib_mtu iboe_get_mtu(int mtu) |
202 | { | |
203 | /* | |
99260132 | 204 | * Reduce IB headers from effective IBoE MTU. |
3c86aa70 | 205 | */ |
99260132 PP |
206 | mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES + |
207 | IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES + | |
208 | IB_ICRC_BYTES); | |
3c86aa70 EC |
209 | |
210 | if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) | |
211 | return IB_MTU_4096; | |
212 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) | |
213 | return IB_MTU_2048; | |
214 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) | |
215 | return IB_MTU_1024; | |
216 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) | |
217 | return IB_MTU_512; | |
218 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) | |
219 | return IB_MTU_256; | |
220 | else | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static inline int iboe_get_rate(struct net_device *dev) | |
225 | { | |
17605b96 | 226 | struct ethtool_link_ksettings cmd; |
4bc71cb9 | 227 | int err; |
3c86aa70 | 228 | |
4bc71cb9 | 229 | rtnl_lock(); |
17605b96 | 230 | err = __ethtool_get_link_ksettings(dev, &cmd); |
4bc71cb9 JP |
231 | rtnl_unlock(); |
232 | if (err) | |
3c86aa70 EC |
233 | return IB_RATE_PORT_CURRENT; |
234 | ||
17605b96 | 235 | if (cmd.base.speed >= 40000) |
3c86aa70 | 236 | return IB_RATE_40_GBPS; |
17605b96 | 237 | else if (cmd.base.speed >= 30000) |
3c86aa70 | 238 | return IB_RATE_30_GBPS; |
17605b96 | 239 | else if (cmd.base.speed >= 20000) |
3c86aa70 | 240 | return IB_RATE_20_GBPS; |
17605b96 | 241 | else if (cmd.base.speed >= 10000) |
3c86aa70 EC |
242 | return IB_RATE_10_GBPS; |
243 | else | |
244 | return IB_RATE_PORT_CURRENT; | |
245 | } | |
246 | ||
247 | static inline int rdma_link_local_addr(struct in6_addr *addr) | |
248 | { | |
249 | if (addr->s6_addr32[0] == htonl(0xfe800000) && | |
250 | addr->s6_addr32[1] == 0) | |
251 | return 1; | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) | |
257 | { | |
258 | memcpy(mac, &addr->s6_addr[8], 3); | |
259 | memcpy(mac + 3, &addr->s6_addr[13], 3); | |
260 | mac[0] ^= 2; | |
261 | } | |
262 | ||
263 | static inline int rdma_is_multicast_addr(struct in6_addr *addr) | |
264 | { | |
1c3aea2b | 265 | __be32 ipv4_addr; |
be1d325a NO |
266 | |
267 | if (addr->s6_addr[0] == 0xff) | |
268 | return 1; | |
269 | ||
1c3aea2b | 270 | ipv4_addr = addr->s6_addr32[3]; |
be1d325a | 271 | return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); |
3c86aa70 EC |
272 | } |
273 | ||
274 | static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) | |
275 | { | |
276 | int i; | |
277 | ||
278 | mac[0] = 0x33; | |
279 | mac[1] = 0x33; | |
280 | for (i = 2; i < 6; ++i) | |
281 | mac[i] = addr->s6_addr[i + 10]; | |
282 | } | |
283 | ||
af7bd463 EC |
284 | static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
285 | { | |
286 | u16 vid; | |
287 | ||
288 | vid = dgid->raw[11] << 8 | dgid->raw[12]; | |
289 | return vid < 0x1000 ? vid : 0xffff; | |
290 | } | |
291 | ||
292 | static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) | |
293 | { | |
d0d7b10b | 294 | return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; |
af7bd463 EC |
295 | } |
296 | ||
7025fcd3 | 297 | #endif /* IB_ADDR_H */ |