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Sean Hefty7025fcd2006-06-17 20:37:28 -07001/*
2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2005 Intel Corporation. All rights reserved.
4 *
Sean Heftya9474912008-07-14 23:48:43 -07005 * 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:
Sean Hefty7025fcd2006-06-17 20:37:28 -070010 *
Sean Heftya9474912008-07-14 23:48:43 -070011 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
Sean Hefty7025fcd2006-06-17 20:37:28 -070014 *
Sean Heftya9474912008-07-14 23:48:43 -070015 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
Sean Hefty7025fcd2006-06-17 20:37:28 -070018 *
Sean Heftya9474912008-07-14 23:48:43 -070019 * - 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.
Sean Hefty7025fcd2006-06-17 20:37:28 -070023 *
Sean Heftya9474912008-07-14 23:48:43 -070024 * 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.
Sean Hefty7025fcd2006-06-17 20:37:28 -070032 */
33
34#if !defined(IB_ADDR_H)
35#define IB_ADDR_H
36
37#include <linux/in.h>
38#include <linux/in6.h>
Sean Heftyc4315d82009-11-19 12:57:18 -080039#include <linux/if_arp.h>
Sean Hefty7025fcd2006-06-17 20:37:28 -070040#include <linux/netdevice.h>
Moni Shoua7b856272013-12-12 18:03:12 +020041#include <linux/inetdevice.h>
Sean Hefty7025fcd2006-06-17 20:37:28 -070042#include <linux/socket.h>
Eli Cohenaf7bd462010-08-26 17:18:59 +030043#include <linux/if_vlan.h>
Moni Shoua7b856272013-12-12 18:03:12 +020044#include <net/ipv6.h>
45#include <net/if_inet6.h>
46#include <net/ip.h>
Sean Hefty7025fcd2006-06-17 20:37:28 -070047#include <rdma/ib_verbs.h>
Eli Cohen3c86aa72010-10-13 21:26:51 +020048#include <rdma/ib_pack.h>
Matan Barakdd5f03b2013-12-12 18:03:11 +020049#include <net/ipv6.h>
Guy Shapiro565edd12015-10-22 15:20:08 +030050#include <net/net_namespace.h>
Sean Hefty7025fcd2006-06-17 20:37:28 -070051
Sean Hefty7a118df2006-10-31 11:12:59 -080052struct rdma_addr_client {
53 atomic_t refcount;
54 struct completion comp;
55};
56
57/**
58 * rdma_addr_register_client - Register an address client.
59 */
60void 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 */
66void rdma_addr_unregister_client(struct rdma_addr_client *client);
67
Guy Shapiro565edd12015-10-22 15:20:08 +030068/**
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 */
Sean Hefty7025fcd2006-06-17 20:37:28 -070078struct 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];
Sean Heftyc4315d82009-11-19 12:57:18 -080082 unsigned short dev_type;
Sean Hefty6266ed62009-11-19 12:55:22 -080083 int bound_dev_if;
Eli Cohen3c86aa72010-10-13 21:26:51 +020084 enum rdma_transport_type transport;
Guy Shapiro565edd12015-10-22 15:20:08 +030085 struct net *net;
Somnath Koturc865f242015-12-23 14:56:51 +020086 enum rdma_network_type network;
Matan Barakc3efe752016-01-04 10:49:54 +020087 int hoplimit;
Sean Hefty7025fcd2006-06-17 20:37:28 -070088};
89
90/**
91 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
92 * address.
Guy Shapiro565edd12015-10-22 15:20:08 +030093 *
94 * The dev_addr->net field must be initialized.
Sean Hefty7025fcd2006-06-17 20:37:28 -070095 */
Matan Barak20029832015-12-23 14:56:53 +020096int rdma_translate_ip(const struct sockaddr *addr,
97 struct rdma_dev_addr *dev_addr, u16 *vlan_id);
Sean Hefty7025fcd2006-06-17 20:37:28 -070098
99/**
100 * rdma_resolve_ip - Resolve source and destination IP addresses to
101 * RDMA hardware addresses.
Sean Hefty7a118df2006-10-31 11:12:59 -0800102 * @client: Address client associated with request.
Sean Hefty7025fcd2006-06-17 20:37:28 -0700103 * @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
Guy Shapiro565edd12015-10-22 15:20:08 +0300109 * been invoked. The net field of the addr struct must be valid.
Sean Hefty7025fcd2006-06-17 20:37:28 -0700110 * @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 */
Sean Hefty7a118df2006-10-31 11:12:59 -0800115int rdma_resolve_ip(struct rdma_addr_client *client,
116 struct sockaddr *src_addr, struct sockaddr *dst_addr,
Sean Hefty7025fcd2006-06-17 20:37:28 -0700117 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
Matan Barak20029832015-12-23 14:56:53 +0200122int rdma_resolve_ip_route(struct sockaddr *src_addr,
123 const struct sockaddr *dst_addr,
124 struct rdma_dev_addr *addr);
125
Sean Hefty7025fcd2006-06-17 20:37:28 -0700126void rdma_addr_cancel(struct rdma_dev_addr *addr);
127
Tom Tucker07ebafb2006-08-03 16:02:42 -0500128int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
129 const unsigned char *dst_dev_addr);
130
Sean Heftyef560862013-05-29 10:09:10 -0700131int rdma_addr_size(struct sockaddr *addr);
Sean Hefty7025fcd2006-06-17 20:37:28 -0700132
Matan Barakdd5f03b2013-12-12 18:03:11 +0200133int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
Matan Barakf7f4b23e2016-01-04 10:49:53 +0200134int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
135 const union ib_gid *dgid,
Matan Barakc3efe752016-01-04 10:49:54 +0200136 u8 *smac, u16 *vlan_id, int *if_index,
137 int *hoplimit);
Matan Barakdd5f03b2013-12-12 18:03:11 +0200138
Sean Hefty7025fcd2006-06-17 20:37:28 -0700139static 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
144static 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
Sean Heftyfaec2f72007-02-15 17:00:17 -0800150static 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
Sean Hefty6f8372b2009-11-19 13:26:06 -0800156static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
Sean Hefty7025fcd2006-06-17 20:37:28 -0700157{
Sean Hefty6f8372b2009-11-19 13:26:06 -0800158 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
Sean Hefty7025fcd2006-06-17 20:37:28 -0700159}
160
Moni Shoua7b856272013-12-12 18:03:12 +0200161static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200162{
Moni Shoua7b856272013-12-12 18:03:12 +0200163 return dev->priv_flags & IFF_802_1Q_VLAN ?
164 vlan_dev_vlan_id(dev) : 0xffff;
Eli Cohen3c86aa72010-10-13 21:26:51 +0200165}
166
Matan Barakdd5f03b2013-12-12 18:03:11 +0200167static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
168{
169 switch (addr->sa_family) {
170 case AF_INET:
171 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
172 addr)->sin_addr.s_addr,
173 (struct in6_addr *)gid);
174 break;
175 case AF_INET6:
176 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
177 break;
178 default:
179 return -EINVAL;
180 }
181 return 0;
182}
183
184/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
Ira Weiny73cdaae2015-05-31 17:15:31 -0400185static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
Matan Barakdd5f03b2013-12-12 18:03:11 +0200186{
187 if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
188 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
189 memset(out_in, 0, sizeof(*out_in));
190 out_in->sin_family = AF_INET;
191 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
192 } else {
193 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
194 memset(out_in, 0, sizeof(*out_in));
195 out_in->sin6_family = AF_INET6;
196 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
197 }
Matan Barakdd5f03b2013-12-12 18:03:11 +0200198}
199
Eli Cohen3c86aa72010-10-13 21:26:51 +0200200static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
201 union ib_gid *gid)
202{
Eli Cohenaf7bd462010-08-26 17:18:59 +0300203 struct net_device *dev;
Moni Shoua7b856272013-12-12 18:03:12 +0200204 struct in_device *ip4;
Eli Cohenaf7bd462010-08-26 17:18:59 +0300205
206 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
207 if (dev) {
Moni Shoua7b856272013-12-12 18:03:12 +0200208 ip4 = (struct in_device *)dev->ip_ptr;
209 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
210 ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
211 (struct in6_addr *)gid);
Eli Cohenaf7bd462010-08-26 17:18:59 +0300212 dev_put(dev);
213 }
Eli Cohen3c86aa72010-10-13 21:26:51 +0200214}
215
Sean Hefty6f8372b2009-11-19 13:26:06 -0800216static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
Sean Hefty7025fcd2006-06-17 20:37:28 -0700217{
Eli Cohen3c86aa72010-10-13 21:26:51 +0200218 if (dev_addr->transport == RDMA_TRANSPORT_IB &&
219 dev_addr->dev_type != ARPHRD_INFINIBAND)
220 iboe_addr_get_sgid(dev_addr, gid);
221 else
222 memcpy(gid, dev_addr->src_dev_addr +
223 rdma_addr_gid_offset(dev_addr), sizeof *gid);
Sean Hefty7025fcd2006-06-17 20:37:28 -0700224}
225
Sean Hefty6f8372b2009-11-19 13:26:06 -0800226static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
Sean Hefty7025fcd2006-06-17 20:37:28 -0700227{
Sean Hefty6f8372b2009-11-19 13:26:06 -0800228 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
Sean Hefty7025fcd2006-06-17 20:37:28 -0700229}
230
Sean Hefty6f8372b2009-11-19 13:26:06 -0800231static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
Sean Hefty7025fcd2006-06-17 20:37:28 -0700232{
Sean Hefty6f8372b2009-11-19 13:26:06 -0800233 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
Sean Hefty7025fcd2006-06-17 20:37:28 -0700234}
235
Sean Hefty6f8372b2009-11-19 13:26:06 -0800236static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
Tom Tucker07ebafb2006-08-03 16:02:42 -0500237{
Sean Hefty6f8372b2009-11-19 13:26:06 -0800238 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
Tom Tucker07ebafb2006-08-03 16:02:42 -0500239}
240
Eli Cohen3c86aa72010-10-13 21:26:51 +0200241static inline enum ib_mtu iboe_get_mtu(int mtu)
242{
243 /*
244 * reduce IB headers from effective IBoE MTU. 28 stands for
245 * atomic header which is the biggest possible header after BTH
246 */
247 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
248
249 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
250 return IB_MTU_4096;
251 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
252 return IB_MTU_2048;
253 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
254 return IB_MTU_1024;
255 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
256 return IB_MTU_512;
257 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
258 return IB_MTU_256;
259 else
260 return 0;
261}
262
263static inline int iboe_get_rate(struct net_device *dev)
264{
265 struct ethtool_cmd cmd;
David Decotigny8ae6dac2011-04-27 18:32:38 +0000266 u32 speed;
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000267 int err;
Eli Cohen3c86aa72010-10-13 21:26:51 +0200268
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000269 rtnl_lock();
270 err = __ethtool_get_settings(dev, &cmd);
271 rtnl_unlock();
272 if (err)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200273 return IB_RATE_PORT_CURRENT;
274
David Decotigny8ae6dac2011-04-27 18:32:38 +0000275 speed = ethtool_cmd_speed(&cmd);
276 if (speed >= 40000)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200277 return IB_RATE_40_GBPS;
David Decotigny8ae6dac2011-04-27 18:32:38 +0000278 else if (speed >= 30000)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200279 return IB_RATE_30_GBPS;
David Decotigny8ae6dac2011-04-27 18:32:38 +0000280 else if (speed >= 20000)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200281 return IB_RATE_20_GBPS;
David Decotigny8ae6dac2011-04-27 18:32:38 +0000282 else if (speed >= 10000)
Eli Cohen3c86aa72010-10-13 21:26:51 +0200283 return IB_RATE_10_GBPS;
284 else
285 return IB_RATE_PORT_CURRENT;
286}
287
288static inline int rdma_link_local_addr(struct in6_addr *addr)
289{
290 if (addr->s6_addr32[0] == htonl(0xfe800000) &&
291 addr->s6_addr32[1] == 0)
292 return 1;
293
294 return 0;
295}
296
297static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
298{
299 memcpy(mac, &addr->s6_addr[8], 3);
300 memcpy(mac + 3, &addr->s6_addr[13], 3);
301 mac[0] ^= 2;
302}
303
304static inline int rdma_is_multicast_addr(struct in6_addr *addr)
305{
306 return addr->s6_addr[0] == 0xff;
307}
308
309static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
310{
311 int i;
312
313 mac[0] = 0x33;
314 mac[1] = 0x33;
315 for (i = 2; i < 6; ++i)
316 mac[i] = addr->s6_addr[i + 10];
317}
318
Eli Cohenaf7bd462010-08-26 17:18:59 +0300319static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
320{
321 u16 vid;
322
323 vid = dgid->raw[11] << 8 | dgid->raw[12];
324 return vid < 0x1000 ? vid : 0xffff;
325}
326
327static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
328{
329 return dev->priv_flags & IFF_802_1Q_VLAN ?
Sean Heftyc89d1be2011-12-06 21:13:10 +0000330 vlan_dev_real_dev(dev) : NULL;
Eli Cohenaf7bd462010-08-26 17:18:59 +0300331}
332
Sean Hefty7025fcd2006-06-17 20:37:28 -0700333#endif /* IB_ADDR_H */