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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; |
7025fcd3 SH |
86 | }; |
87 | ||
88 | /** | |
89 | * rdma_translate_ip - Translate a local IP address to an RDMA hardware | |
90 | * address. | |
565edd1d GS |
91 | * |
92 | * The dev_addr->net field must be initialized. | |
7025fcd3 | 93 | */ |
dd5f03be MB |
94 | int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, |
95 | u16 *vlan_id); | |
7025fcd3 SH |
96 | |
97 | /** | |
98 | * rdma_resolve_ip - Resolve source and destination IP addresses to | |
99 | * RDMA hardware addresses. | |
7a118df3 | 100 | * @client: Address client associated with request. |
7025fcd3 SH |
101 | * @src_addr: An optional source address to use in the resolution. If a |
102 | * source address is not provided, a usable address will be returned via | |
103 | * the callback. | |
104 | * @dst_addr: The destination address to resolve. | |
105 | * @addr: A reference to a data location that will receive the resolved | |
106 | * addresses. The data location must remain valid until the callback has | |
565edd1d | 107 | * been invoked. The net field of the addr struct must be valid. |
7025fcd3 SH |
108 | * @timeout_ms: Amount of time to wait for the address resolution to complete. |
109 | * @callback: Call invoked once address resolution has completed, timed out, | |
110 | * or been canceled. A status of 0 indicates success. | |
111 | * @context: User-specified context associated with the call. | |
112 | */ | |
7a118df3 SH |
113 | int rdma_resolve_ip(struct rdma_addr_client *client, |
114 | struct sockaddr *src_addr, struct sockaddr *dst_addr, | |
7025fcd3 SH |
115 | struct rdma_dev_addr *addr, int timeout_ms, |
116 | void (*callback)(int status, struct sockaddr *src_addr, | |
117 | struct rdma_dev_addr *addr, void *context), | |
118 | void *context); | |
119 | ||
120 | void rdma_addr_cancel(struct rdma_dev_addr *addr); | |
121 | ||
07ebafba TT |
122 | int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, |
123 | const unsigned char *dst_dev_addr); | |
124 | ||
ef560861 | 125 | int rdma_addr_size(struct sockaddr *addr); |
7025fcd3 | 126 | |
dd5f03be | 127 | int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); |
73cdaaee | 128 | int rdma_addr_find_dmac_by_grh(const union ib_gid *sgid, const union ib_gid *dgid, |
dbf727de | 129 | u8 *smac, u16 *vlan_id, int if_index); |
dd5f03be | 130 | |
7025fcd3 SH |
131 | static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) |
132 | { | |
133 | return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; | |
134 | } | |
135 | ||
136 | static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) | |
137 | { | |
138 | dev_addr->broadcast[8] = pkey >> 8; | |
139 | dev_addr->broadcast[9] = (unsigned char) pkey; | |
140 | } | |
141 | ||
faec2f7b SH |
142 | static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, |
143 | union ib_gid *gid) | |
144 | { | |
145 | memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); | |
146 | } | |
147 | ||
6f8372b6 | 148 | static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
7025fcd3 | 149 | { |
6f8372b6 | 150 | return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
7025fcd3 SH |
151 | } |
152 | ||
7b85627b | 153 | static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) |
3c86aa70 | 154 | { |
7b85627b MS |
155 | return dev->priv_flags & IFF_802_1Q_VLAN ? |
156 | vlan_dev_vlan_id(dev) : 0xffff; | |
3c86aa70 EC |
157 | } |
158 | ||
dd5f03be MB |
159 | static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) |
160 | { | |
161 | switch (addr->sa_family) { | |
162 | case AF_INET: | |
163 | ipv6_addr_set_v4mapped(((struct sockaddr_in *) | |
164 | addr)->sin_addr.s_addr, | |
165 | (struct in6_addr *)gid); | |
166 | break; | |
167 | case AF_INET6: | |
168 | memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); | |
169 | break; | |
170 | default: | |
171 | return -EINVAL; | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
176 | /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ | |
73cdaaee | 177 | static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) |
dd5f03be MB |
178 | { |
179 | if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { | |
180 | struct sockaddr_in *out_in = (struct sockaddr_in *)out; | |
181 | memset(out_in, 0, sizeof(*out_in)); | |
182 | out_in->sin_family = AF_INET; | |
183 | memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); | |
184 | } else { | |
185 | struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; | |
186 | memset(out_in, 0, sizeof(*out_in)); | |
187 | out_in->sin6_family = AF_INET6; | |
188 | memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); | |
189 | } | |
dd5f03be MB |
190 | } |
191 | ||
3c86aa70 EC |
192 | static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, |
193 | union ib_gid *gid) | |
194 | { | |
af7bd463 | 195 | struct net_device *dev; |
7b85627b | 196 | struct in_device *ip4; |
af7bd463 EC |
197 | |
198 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); | |
199 | if (dev) { | |
7b85627b MS |
200 | ip4 = (struct in_device *)dev->ip_ptr; |
201 | if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address) | |
202 | ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address, | |
203 | (struct in6_addr *)gid); | |
af7bd463 EC |
204 | dev_put(dev); |
205 | } | |
3c86aa70 EC |
206 | } |
207 | ||
6f8372b6 | 208 | static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 209 | { |
3c86aa70 EC |
210 | if (dev_addr->transport == RDMA_TRANSPORT_IB && |
211 | dev_addr->dev_type != ARPHRD_INFINIBAND) | |
212 | iboe_addr_get_sgid(dev_addr, gid); | |
213 | else | |
214 | memcpy(gid, dev_addr->src_dev_addr + | |
215 | rdma_addr_gid_offset(dev_addr), sizeof *gid); | |
7025fcd3 SH |
216 | } |
217 | ||
6f8372b6 | 218 | static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 219 | { |
6f8372b6 | 220 | memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
7025fcd3 SH |
221 | } |
222 | ||
6f8372b6 | 223 | static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 224 | { |
6f8372b6 | 225 | memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
7025fcd3 SH |
226 | } |
227 | ||
6f8372b6 | 228 | static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
07ebafba | 229 | { |
6f8372b6 | 230 | memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
07ebafba TT |
231 | } |
232 | ||
3c86aa70 EC |
233 | static inline enum ib_mtu iboe_get_mtu(int mtu) |
234 | { | |
235 | /* | |
236 | * reduce IB headers from effective IBoE MTU. 28 stands for | |
237 | * atomic header which is the biggest possible header after BTH | |
238 | */ | |
239 | mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; | |
240 | ||
241 | if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) | |
242 | return IB_MTU_4096; | |
243 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) | |
244 | return IB_MTU_2048; | |
245 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) | |
246 | return IB_MTU_1024; | |
247 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) | |
248 | return IB_MTU_512; | |
249 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) | |
250 | return IB_MTU_256; | |
251 | else | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static inline int iboe_get_rate(struct net_device *dev) | |
256 | { | |
257 | struct ethtool_cmd cmd; | |
8ae6daca | 258 | u32 speed; |
4bc71cb9 | 259 | int err; |
3c86aa70 | 260 | |
4bc71cb9 JP |
261 | rtnl_lock(); |
262 | err = __ethtool_get_settings(dev, &cmd); | |
263 | rtnl_unlock(); | |
264 | if (err) | |
3c86aa70 EC |
265 | return IB_RATE_PORT_CURRENT; |
266 | ||
8ae6daca DD |
267 | speed = ethtool_cmd_speed(&cmd); |
268 | if (speed >= 40000) | |
3c86aa70 | 269 | return IB_RATE_40_GBPS; |
8ae6daca | 270 | else if (speed >= 30000) |
3c86aa70 | 271 | return IB_RATE_30_GBPS; |
8ae6daca | 272 | else if (speed >= 20000) |
3c86aa70 | 273 | return IB_RATE_20_GBPS; |
8ae6daca | 274 | else if (speed >= 10000) |
3c86aa70 EC |
275 | return IB_RATE_10_GBPS; |
276 | else | |
277 | return IB_RATE_PORT_CURRENT; | |
278 | } | |
279 | ||
280 | static inline int rdma_link_local_addr(struct in6_addr *addr) | |
281 | { | |
282 | if (addr->s6_addr32[0] == htonl(0xfe800000) && | |
283 | addr->s6_addr32[1] == 0) | |
284 | return 1; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) | |
290 | { | |
291 | memcpy(mac, &addr->s6_addr[8], 3); | |
292 | memcpy(mac + 3, &addr->s6_addr[13], 3); | |
293 | mac[0] ^= 2; | |
294 | } | |
295 | ||
296 | static inline int rdma_is_multicast_addr(struct in6_addr *addr) | |
297 | { | |
298 | return addr->s6_addr[0] == 0xff; | |
299 | } | |
300 | ||
301 | static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) | |
302 | { | |
303 | int i; | |
304 | ||
305 | mac[0] = 0x33; | |
306 | mac[1] = 0x33; | |
307 | for (i = 2; i < 6; ++i) | |
308 | mac[i] = addr->s6_addr[i + 10]; | |
309 | } | |
310 | ||
af7bd463 EC |
311 | static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
312 | { | |
313 | u16 vid; | |
314 | ||
315 | vid = dgid->raw[11] << 8 | dgid->raw[12]; | |
316 | return vid < 0x1000 ? vid : 0xffff; | |
317 | } | |
318 | ||
319 | static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) | |
320 | { | |
321 | return dev->priv_flags & IFF_802_1Q_VLAN ? | |
c89d1bed | 322 | vlan_dev_real_dev(dev) : NULL; |
af7bd463 EC |
323 | } |
324 | ||
7025fcd3 | 325 | #endif /* IB_ADDR_H */ |