1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
5 * Copyright (c) 2005 Intel Corporation. All rights reserved.
6 *
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer.
20 *
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
25 *
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 * SOFTWARE.
34 *
35 * $FreeBSD$
36 */
37
38 #if !defined(IB_ADDR_H)
39 #define IB_ADDR_H
40
41 #include <linux/in.h>
42 #include <linux/in6.h>
43 #include <linux/if_arp.h>
44 #include <linux/netdevice.h>
45 #include <linux/inetdevice.h>
46 #include <linux/socket.h>
47 #include <linux/if_vlan.h>
48 #include <net/ipv6.h>
49 #include <net/if_inet6.h>
50 #include <net/ip.h>
51 #include <rdma/ib_verbs.h>
52 #include <rdma/ib_pack.h>
53 #include <net/ipv6.h>
54
55 struct rdma_addr_client {
56 atomic_t refcount;
57 struct completion comp;
58 };
59
60 /**
61 * rdma_addr_register_client - Register an address client.
62 */
63 void rdma_addr_register_client(struct rdma_addr_client *client);
64
65 /**
66 * rdma_addr_unregister_client - Deregister an address client.
67 * @client: Client object to deregister.
68 */
69 void rdma_addr_unregister_client(struct rdma_addr_client *client);
70
71 /**
72 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
73 * @src_dev_addr: Source MAC address.
74 * @dst_dev_addr: Destination MAC address.
75 * @broadcast: Broadcast address of the device.
76 * @dev_type: The interface hardware type of the device.
77 * @bound_dev_if: An optional device interface index.
78 * @transport: The transport type used.
79 * @net: Network namespace containing the bound_dev_if net_dev.
80 */
81 struct vnet;
82 struct rdma_dev_addr {
83 unsigned char src_dev_addr[MAX_ADDR_LEN];
84 unsigned char dst_dev_addr[MAX_ADDR_LEN];
85 unsigned char broadcast[MAX_ADDR_LEN];
86 unsigned short dev_type;
87 int bound_dev_if;
88 enum rdma_transport_type transport;
89 struct vnet *net;
90 enum rdma_network_type network;
91 int hoplimit;
92 };
93
94 /**
95 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
96 * address.
97 *
98 * The dev_addr->net and dev_addr->bound_dev_if fields must be initialized.
99 */
100 int rdma_translate_ip(const struct sockaddr *addr,
101 struct rdma_dev_addr *dev_addr);
102
103 /**
104 * rdma_resolve_ip - Resolve source and destination IP addresses to
105 * RDMA hardware addresses.
106 * @client: Address client associated with request.
107 * @src_addr: An optional source address to use in the resolution. If a
108 * source address is not provided, a usable address will be returned via
109 * the callback.
110 * @dst_addr: The destination address to resolve.
111 * @addr: A reference to a data location that will receive the resolved
112 * addresses. The data location must remain valid until the callback has
113 * been invoked. The net field of the addr struct must be valid.
114 * @timeout_ms: Amount of time to wait for the address resolution to complete.
115 * @callback: Call invoked once address resolution has completed, timed out,
116 * or been canceled. A status of 0 indicates success.
117 * @context: User-specified context associated with the call.
118 */
119 int rdma_resolve_ip(struct rdma_addr_client *client,
120 struct sockaddr *src_addr, struct sockaddr *dst_addr,
121 struct rdma_dev_addr *addr, int timeout_ms,
122 void (*callback)(int status, struct sockaddr *src_addr,
123 struct rdma_dev_addr *addr, void *context),
124 void *context);
125
126 int rdma_resolve_ip_route(struct sockaddr *src_addr,
127 const struct sockaddr *dst_addr,
128 struct rdma_dev_addr *addr);
129
130 void rdma_addr_cancel(struct rdma_dev_addr *addr);
131
132 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
133 const unsigned char *dst_dev_addr);
134
135 int rdma_addr_size(struct sockaddr *addr);
136 int rdma_addr_size_in6(struct sockaddr_in6 *addr);
137 int rdma_addr_size_kss(struct sockaddr_storage *addr);
138
139 int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
140 const union ib_gid *dgid,
141 u8 *smac, struct net_device *dev,
142 int *hoplimit);
143
ib_addr_get_pkey(struct rdma_dev_addr * dev_addr)144 static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
145 {
146 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
147 }
148
ib_addr_set_pkey(struct rdma_dev_addr * dev_addr,u16 pkey)149 static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
150 {
151 dev_addr->broadcast[8] = pkey >> 8;
152 dev_addr->broadcast[9] = (unsigned char) pkey;
153 }
154
ib_addr_get_mgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)155 static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
156 union ib_gid *gid)
157 {
158 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
159 }
160
rdma_addr_gid_offset(struct rdma_dev_addr * dev_addr)161 static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
162 {
163 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
164 }
165
rdma_vlan_dev_vlan_id(const struct net_device * dev)166 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
167 {
168 uint16_t tag;
169
170 if (dev->if_type == IFT_ETHER && dev->if_pcp != IFNET_PCP_NONE)
171 return 0x0000; /* prio-tagged traffic */
172 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0)
173 return 0xffff;
174 return tag;
175 }
176
rdma_ip2gid(const struct sockaddr * addr,union ib_gid * gid)177 static inline int rdma_ip2gid(const struct sockaddr *addr, union ib_gid *gid)
178 {
179 switch (addr->sa_family) {
180 case AF_INET:
181 ipv6_addr_set_v4mapped(((const struct sockaddr_in *)
182 addr)->sin_addr.s_addr,
183 (struct in6_addr *)gid);
184 break;
185 case AF_INET6:
186 memcpy(gid->raw, &((const struct sockaddr_in6 *)addr)->sin6_addr, 16);
187 /* make sure scope ID gets zeroed inside GID */
188 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) ||
189 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) {
190 gid->raw[2] = 0;
191 gid->raw[3] = 0;
192 }
193 break;
194 default:
195 return -EINVAL;
196 }
197 return 0;
198 }
199
200 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
rdma_gid2ip(struct sockaddr * out,const union ib_gid * gid)201 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
202 {
203 if (ipv6_addr_v4mapped((const struct in6_addr *)gid)) {
204 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
205 memset(out_in, 0, sizeof(*out_in));
206 out_in->sin_len = sizeof(*out_in);
207 out_in->sin_family = AF_INET;
208 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
209 } else {
210 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
211 memset(out_in, 0, sizeof(*out_in));
212 out_in->sin6_len = sizeof(*out_in);
213 out_in->sin6_family = AF_INET6;
214 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
215 }
216 }
217
iboe_addr_get_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)218 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
219 union ib_gid *gid)
220 {
221 struct net_device *dev;
222 struct ifaddr *ifa;
223
224 #ifdef VIMAGE
225 if (dev_addr->net == NULL)
226 return;
227 #endif
228 dev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
229 if (dev) {
230 CK_STAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) {
231 if (ifa->ifa_addr == NULL ||
232 ifa->ifa_addr->sa_family != AF_INET)
233 continue;
234 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
235 ifa->ifa_addr)->sin_addr.s_addr,
236 (struct in6_addr *)gid);
237 break;
238 }
239 dev_put(dev);
240 }
241 }
242
rdma_addr_get_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)243 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
244 {
245 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
246 dev_addr->dev_type != ARPHRD_INFINIBAND)
247 iboe_addr_get_sgid(dev_addr, gid);
248 else
249 memcpy(gid, dev_addr->src_dev_addr +
250 rdma_addr_gid_offset(dev_addr), sizeof *gid);
251 }
252
rdma_addr_set_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)253 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
254 {
255 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
256 }
257
rdma_addr_get_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)258 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
259 {
260 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
261 }
262
rdma_addr_set_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)263 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
264 {
265 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
266 }
267
iboe_get_mtu(int mtu)268 static inline enum ib_mtu iboe_get_mtu(int mtu)
269 {
270 /*
271 * reduce IB headers from effective IBoE MTU. 28 stands for
272 * atomic header which is the biggest possible header after BTH
273 */
274 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
275
276 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
277 return IB_MTU_4096;
278 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
279 return IB_MTU_2048;
280 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
281 return IB_MTU_1024;
282 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
283 return IB_MTU_512;
284 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
285 return IB_MTU_256;
286 else
287 return 0;
288 }
289
iboe_get_rate(struct net_device * dev)290 static inline int iboe_get_rate(struct net_device *dev)
291 {
292 uint64_t baudrate = dev->if_baudrate;
293 #ifdef if_baudrate_pf
294 int exp;
295 for (exp = dev->if_baudrate_pf; exp > 0; exp--)
296 baudrate *= 10;
297 #endif
298 if (baudrate >= IF_Gbps(40))
299 return IB_RATE_40_GBPS;
300 else if (baudrate >= IF_Gbps(30))
301 return IB_RATE_30_GBPS;
302 else if (baudrate >= IF_Gbps(20))
303 return IB_RATE_20_GBPS;
304 else if (baudrate >= IF_Gbps(10))
305 return IB_RATE_10_GBPS;
306 else
307 return IB_RATE_PORT_CURRENT;
308 }
309
rdma_link_local_addr(struct in6_addr * addr)310 static inline int rdma_link_local_addr(struct in6_addr *addr)
311 {
312 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
313 addr->s6_addr32[1] == 0)
314 return 1;
315
316 return 0;
317 }
318
rdma_get_ll_mac(struct in6_addr * addr,u8 * mac)319 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
320 {
321 memcpy(mac, &addr->s6_addr[8], 3);
322 memcpy(mac + 3, &addr->s6_addr[13], 3);
323 mac[0] ^= 2;
324 }
325
rdma_is_multicast_addr(struct in6_addr * addr)326 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
327 {
328 __be32 ipv4_addr;
329
330 if (addr->s6_addr[0] == 0xff)
331 return 1;
332
333 ipv4_addr = addr->s6_addr32[3];
334 return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
335 }
336
rdma_get_mcast_mac(struct in6_addr * addr,u8 * mac)337 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
338 {
339 int i;
340
341 mac[0] = 0x33;
342 mac[1] = 0x33;
343 for (i = 2; i < 6; ++i)
344 mac[i] = addr->s6_addr[i + 10];
345 }
346
rdma_get_vlan_id(union ib_gid * dgid)347 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
348 {
349 u16 vid;
350
351 vid = dgid->raw[11] << 8 | dgid->raw[12];
352 return vid < 0x1000 ? vid : 0xffff;
353 }
354
rdma_vlan_dev_real_dev(struct net_device * dev)355 static inline struct net_device *rdma_vlan_dev_real_dev(struct net_device *dev)
356 {
357 if (dev->if_type == IFT_ETHER && dev->if_pcp != IFNET_PCP_NONE)
358 return dev; /* prio-tagged traffic */
359 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev));
360 }
361
362 #endif /* IB_ADDR_H */
363