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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 | ||
ef560861 | 105 | int rdma_addr_size(struct sockaddr *addr); |
7025fcd3 SH |
106 | |
107 | static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) | |
108 | { | |
109 | return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; | |
110 | } | |
111 | ||
112 | static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) | |
113 | { | |
114 | dev_addr->broadcast[8] = pkey >> 8; | |
115 | dev_addr->broadcast[9] = (unsigned char) pkey; | |
116 | } | |
117 | ||
faec2f7b SH |
118 | static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, |
119 | union ib_gid *gid) | |
120 | { | |
121 | memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); | |
122 | } | |
123 | ||
6f8372b6 | 124 | static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
7025fcd3 | 125 | { |
6f8372b6 | 126 | return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
7025fcd3 SH |
127 | } |
128 | ||
af7bd463 | 129 | static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid) |
3c86aa70 EC |
130 | { |
131 | memset(gid->raw, 0, 16); | |
132 | *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000); | |
af7bd463 EC |
133 | if (vid < 0x1000) { |
134 | gid->raw[12] = vid & 0xff; | |
135 | gid->raw[11] = vid >> 8; | |
136 | } else { | |
137 | gid->raw[12] = 0xfe; | |
138 | gid->raw[11] = 0xff; | |
139 | } | |
3c86aa70 EC |
140 | memcpy(gid->raw + 13, mac + 3, 3); |
141 | memcpy(gid->raw + 8, mac, 3); | |
142 | gid->raw[8] ^= 2; | |
143 | } | |
144 | ||
af7bd463 EC |
145 | static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) |
146 | { | |
147 | return dev->priv_flags & IFF_802_1Q_VLAN ? | |
148 | vlan_dev_vlan_id(dev) : 0xffff; | |
149 | } | |
150 | ||
3c86aa70 EC |
151 | static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, |
152 | union ib_gid *gid) | |
153 | { | |
af7bd463 EC |
154 | struct net_device *dev; |
155 | u16 vid = 0xffff; | |
156 | ||
157 | dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); | |
158 | if (dev) { | |
159 | vid = rdma_vlan_dev_vlan_id(dev); | |
160 | dev_put(dev); | |
161 | } | |
162 | ||
163 | iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid); | |
3c86aa70 EC |
164 | } |
165 | ||
6f8372b6 | 166 | static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 167 | { |
3c86aa70 EC |
168 | if (dev_addr->transport == RDMA_TRANSPORT_IB && |
169 | dev_addr->dev_type != ARPHRD_INFINIBAND) | |
170 | iboe_addr_get_sgid(dev_addr, gid); | |
171 | else | |
172 | memcpy(gid, dev_addr->src_dev_addr + | |
173 | rdma_addr_gid_offset(dev_addr), sizeof *gid); | |
7025fcd3 SH |
174 | } |
175 | ||
6f8372b6 | 176 | static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 177 | { |
6f8372b6 | 178 | memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
7025fcd3 SH |
179 | } |
180 | ||
6f8372b6 | 181 | static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
7025fcd3 | 182 | { |
6f8372b6 | 183 | memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
7025fcd3 SH |
184 | } |
185 | ||
6f8372b6 | 186 | static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
07ebafba | 187 | { |
6f8372b6 | 188 | memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
07ebafba TT |
189 | } |
190 | ||
3c86aa70 EC |
191 | static inline enum ib_mtu iboe_get_mtu(int mtu) |
192 | { | |
193 | /* | |
194 | * reduce IB headers from effective IBoE MTU. 28 stands for | |
195 | * atomic header which is the biggest possible header after BTH | |
196 | */ | |
197 | mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; | |
198 | ||
199 | if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) | |
200 | return IB_MTU_4096; | |
201 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) | |
202 | return IB_MTU_2048; | |
203 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) | |
204 | return IB_MTU_1024; | |
205 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) | |
206 | return IB_MTU_512; | |
207 | else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) | |
208 | return IB_MTU_256; | |
209 | else | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static inline int iboe_get_rate(struct net_device *dev) | |
214 | { | |
215 | struct ethtool_cmd cmd; | |
8ae6daca | 216 | u32 speed; |
4bc71cb9 | 217 | int err; |
3c86aa70 | 218 | |
4bc71cb9 JP |
219 | rtnl_lock(); |
220 | err = __ethtool_get_settings(dev, &cmd); | |
221 | rtnl_unlock(); | |
222 | if (err) | |
3c86aa70 EC |
223 | return IB_RATE_PORT_CURRENT; |
224 | ||
8ae6daca DD |
225 | speed = ethtool_cmd_speed(&cmd); |
226 | if (speed >= 40000) | |
3c86aa70 | 227 | return IB_RATE_40_GBPS; |
8ae6daca | 228 | else if (speed >= 30000) |
3c86aa70 | 229 | return IB_RATE_30_GBPS; |
8ae6daca | 230 | else if (speed >= 20000) |
3c86aa70 | 231 | return IB_RATE_20_GBPS; |
8ae6daca | 232 | else if (speed >= 10000) |
3c86aa70 EC |
233 | return IB_RATE_10_GBPS; |
234 | else | |
235 | return IB_RATE_PORT_CURRENT; | |
236 | } | |
237 | ||
238 | static inline int rdma_link_local_addr(struct in6_addr *addr) | |
239 | { | |
240 | if (addr->s6_addr32[0] == htonl(0xfe800000) && | |
241 | addr->s6_addr32[1] == 0) | |
242 | return 1; | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) | |
248 | { | |
249 | memcpy(mac, &addr->s6_addr[8], 3); | |
250 | memcpy(mac + 3, &addr->s6_addr[13], 3); | |
251 | mac[0] ^= 2; | |
252 | } | |
253 | ||
254 | static inline int rdma_is_multicast_addr(struct in6_addr *addr) | |
255 | { | |
256 | return addr->s6_addr[0] == 0xff; | |
257 | } | |
258 | ||
259 | static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) | |
260 | { | |
261 | int i; | |
262 | ||
263 | mac[0] = 0x33; | |
264 | mac[1] = 0x33; | |
265 | for (i = 2; i < 6; ++i) | |
266 | mac[i] = addr->s6_addr[i + 10]; | |
267 | } | |
268 | ||
af7bd463 EC |
269 | static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
270 | { | |
271 | u16 vid; | |
272 | ||
273 | vid = dgid->raw[11] << 8 | dgid->raw[12]; | |
274 | return vid < 0x1000 ? vid : 0xffff; | |
275 | } | |
276 | ||
277 | static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) | |
278 | { | |
279 | return dev->priv_flags & IFF_802_1Q_VLAN ? | |
c89d1bed | 280 | vlan_dev_real_dev(dev) : NULL; |
af7bd463 EC |
281 | } |
282 | ||
7025fcd3 | 283 | #endif /* IB_ADDR_H */ |