16bf9d8f6SLeon Romanovsky /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
27025fcd3SSean Hefty /*
37025fcd3SSean Hefty * Copyright (c) 2005 Voltaire Inc. All rights reserved.
47025fcd3SSean Hefty * Copyright (c) 2005 Intel Corporation. All rights reserved.
57025fcd3SSean Hefty */
67025fcd3SSean Hefty
76bf9d8f6SLeon Romanovsky #ifndef IB_ADDR_H
87025fcd3SSean Hefty #define IB_ADDR_H
97025fcd3SSean Hefty
10*cc69837fSJakub Kicinski #include <linux/ethtool.h>
117025fcd3SSean Hefty #include <linux/in.h>
127025fcd3SSean Hefty #include <linux/in6.h>
13c4315d85SSean Hefty #include <linux/if_arp.h>
147025fcd3SSean Hefty #include <linux/netdevice.h>
157b85627bSMoni Shoua #include <linux/inetdevice.h>
167025fcd3SSean Hefty #include <linux/socket.h>
17af7bd463SEli Cohen #include <linux/if_vlan.h>
187b85627bSMoni Shoua #include <net/ipv6.h>
197b85627bSMoni Shoua #include <net/if_inet6.h>
207b85627bSMoni Shoua #include <net/ip.h>
217025fcd3SSean Hefty #include <rdma/ib_verbs.h>
223c86aa70SEli Cohen #include <rdma/ib_pack.h>
23565edd1dSGuy Shapiro #include <net/net_namespace.h>
247025fcd3SSean Hefty
25565edd1dSGuy Shapiro /**
26565edd1dSGuy Shapiro * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
27565edd1dSGuy Shapiro * @src_dev_addr: Source MAC address.
28565edd1dSGuy Shapiro * @dst_dev_addr: Destination MAC address.
29565edd1dSGuy Shapiro * @broadcast: Broadcast address of the device.
30565edd1dSGuy Shapiro * @dev_type: The interface hardware type of the device.
31565edd1dSGuy Shapiro * @bound_dev_if: An optional device interface index.
32565edd1dSGuy Shapiro * @transport: The transport type used.
33565edd1dSGuy Shapiro * @net: Network namespace containing the bound_dev_if net_dev.
344ed13a5fSParav Pandit * @sgid_attr: GID attribute to use for identified SGID
35565edd1dSGuy Shapiro */
367025fcd3SSean Hefty struct rdma_dev_addr {
377025fcd3SSean Hefty unsigned char src_dev_addr[MAX_ADDR_LEN];
387025fcd3SSean Hefty unsigned char dst_dev_addr[MAX_ADDR_LEN];
397025fcd3SSean Hefty unsigned char broadcast[MAX_ADDR_LEN];
40c4315d85SSean Hefty unsigned short dev_type;
416266ed6eSSean Hefty int bound_dev_if;
423c86aa70SEli Cohen enum rdma_transport_type transport;
43565edd1dSGuy Shapiro struct net *net;
444ed13a5fSParav Pandit const struct ib_gid_attr *sgid_attr;
45c865f246SSomnath Kotur enum rdma_network_type network;
46c3efe750SMatan Barak int hoplimit;
477025fcd3SSean Hefty };
487025fcd3SSean Hefty
497025fcd3SSean Hefty /**
507025fcd3SSean Hefty * rdma_translate_ip - Translate a local IP address to an RDMA hardware
517025fcd3SSean Hefty * address.
52565edd1dSGuy Shapiro *
53565edd1dSGuy Shapiro * The dev_addr->net field must be initialized.
547025fcd3SSean Hefty */
5520029832SMatan Barak int rdma_translate_ip(const struct sockaddr *addr,
56575c7e58SParav Pandit struct rdma_dev_addr *dev_addr);
577025fcd3SSean Hefty
587025fcd3SSean Hefty /**
597025fcd3SSean Hefty * rdma_resolve_ip - Resolve source and destination IP addresses to
607025fcd3SSean Hefty * RDMA hardware addresses.
617025fcd3SSean Hefty * @src_addr: An optional source address to use in the resolution. If a
627025fcd3SSean Hefty * source address is not provided, a usable address will be returned via
637025fcd3SSean Hefty * the callback.
647025fcd3SSean Hefty * @dst_addr: The destination address to resolve.
657025fcd3SSean Hefty * @addr: A reference to a data location that will receive the resolved
667025fcd3SSean Hefty * addresses. The data location must remain valid until the callback has
67565edd1dSGuy Shapiro * been invoked. The net field of the addr struct must be valid.
687025fcd3SSean Hefty * @timeout_ms: Amount of time to wait for the address resolution to complete.
697025fcd3SSean Hefty * @callback: Call invoked once address resolution has completed, timed out,
707025fcd3SSean Hefty * or been canceled. A status of 0 indicates success.
710e9d2c19SParav Pandit * @resolve_by_gid_attr: Resolve the ip based on the GID attribute from
720e9d2c19SParav Pandit * rdma_dev_addr.
737025fcd3SSean Hefty * @context: User-specified context associated with the call.
747025fcd3SSean Hefty */
752df7dba8SParav Pandit int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
76dbace111SLeon Romanovsky struct rdma_dev_addr *addr, unsigned long timeout_ms,
777025fcd3SSean Hefty void (*callback)(int status, struct sockaddr *src_addr,
787025fcd3SSean Hefty struct rdma_dev_addr *addr, void *context),
799549c2bdSLeon Romanovsky bool resolve_by_gid_attr, void *context);
807025fcd3SSean Hefty
817025fcd3SSean Hefty void rdma_addr_cancel(struct rdma_dev_addr *addr);
827025fcd3SSean Hefty
832df7dba8SParav Pandit int rdma_addr_size(const struct sockaddr *addr);
8484652aefSRoland Dreier int rdma_addr_size_in6(struct sockaddr_in6 *addr);
8584652aefSRoland Dreier int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
867025fcd3SSean Hefty
ib_addr_get_pkey(struct rdma_dev_addr * dev_addr)877025fcd3SSean Hefty static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
887025fcd3SSean Hefty {
897025fcd3SSean Hefty return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
907025fcd3SSean Hefty }
917025fcd3SSean Hefty
ib_addr_set_pkey(struct rdma_dev_addr * dev_addr,u16 pkey)927025fcd3SSean Hefty static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
937025fcd3SSean Hefty {
947025fcd3SSean Hefty dev_addr->broadcast[8] = pkey >> 8;
957025fcd3SSean Hefty dev_addr->broadcast[9] = (unsigned char) pkey;
967025fcd3SSean Hefty }
977025fcd3SSean Hefty
ib_addr_get_mgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)98faec2f7bSSean Hefty static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
99faec2f7bSSean Hefty union ib_gid *gid)
100faec2f7bSSean Hefty {
101faec2f7bSSean Hefty memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
102faec2f7bSSean Hefty }
103faec2f7bSSean Hefty
rdma_addr_gid_offset(struct rdma_dev_addr * dev_addr)1046f8372b6SSean Hefty static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
1057025fcd3SSean Hefty {
1066f8372b6SSean Hefty return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
1077025fcd3SSean Hefty }
1087025fcd3SSean Hefty
rdma_vlan_dev_vlan_id(const struct net_device * dev)1097b85627bSMoni Shoua static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
1103c86aa70SEli Cohen {
111d0d7b10bSParav Pandit return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
1123c86aa70SEli Cohen }
1133c86aa70SEli Cohen
rdma_ip2gid(struct sockaddr * addr,union ib_gid * gid)114dd5f03beSMatan Barak static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
115dd5f03beSMatan Barak {
116dd5f03beSMatan Barak switch (addr->sa_family) {
117dd5f03beSMatan Barak case AF_INET:
118dd5f03beSMatan Barak ipv6_addr_set_v4mapped(((struct sockaddr_in *)
119dd5f03beSMatan Barak addr)->sin_addr.s_addr,
120dd5f03beSMatan Barak (struct in6_addr *)gid);
121dd5f03beSMatan Barak break;
122dd5f03beSMatan Barak case AF_INET6:
1235f8a4db7SArnd Bergmann *(struct in6_addr *)&gid->raw =
1245f8a4db7SArnd Bergmann ((struct sockaddr_in6 *)addr)->sin6_addr;
125dd5f03beSMatan Barak break;
126dd5f03beSMatan Barak default:
127dd5f03beSMatan Barak return -EINVAL;
128dd5f03beSMatan Barak }
129dd5f03beSMatan Barak return 0;
130dd5f03beSMatan Barak }
131dd5f03beSMatan Barak
132dd5f03beSMatan Barak /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
rdma_gid2ip(struct sockaddr * out,const union ib_gid * gid)13373cdaaeeSIra Weiny static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
134dd5f03beSMatan Barak {
135dd5f03beSMatan Barak if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
136dd5f03beSMatan Barak struct sockaddr_in *out_in = (struct sockaddr_in *)out;
137dd5f03beSMatan Barak memset(out_in, 0, sizeof(*out_in));
138dd5f03beSMatan Barak out_in->sin_family = AF_INET;
139dd5f03beSMatan Barak memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
140dd5f03beSMatan Barak } else {
141dd5f03beSMatan Barak struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
142dd5f03beSMatan Barak memset(out_in, 0, sizeof(*out_in));
143dd5f03beSMatan Barak out_in->sin6_family = AF_INET6;
144dd5f03beSMatan Barak memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
145dd5f03beSMatan Barak }
146dd5f03beSMatan Barak }
147dd5f03beSMatan Barak
14815cbc519SParav Pandit /*
14915cbc519SParav Pandit * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
15015cbc519SParav Pandit * They are not applicable to RoCE.
15115cbc519SParav Pandit * RoCE GIDs are derived from the IP addresses.
15215cbc519SParav Pandit */
rdma_addr_get_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)1536f8372b6SSean Hefty static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
1547025fcd3SSean Hefty {
15515cbc519SParav Pandit memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
15615cbc519SParav Pandit sizeof(*gid));
1577025fcd3SSean Hefty }
1587025fcd3SSean Hefty
rdma_addr_set_sgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)1596f8372b6SSean Hefty static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
1607025fcd3SSean Hefty {
1616f8372b6SSean Hefty memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
1627025fcd3SSean Hefty }
1637025fcd3SSean Hefty
rdma_addr_get_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)1646f8372b6SSean Hefty static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
1657025fcd3SSean Hefty {
1666f8372b6SSean Hefty memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
1677025fcd3SSean Hefty }
1687025fcd3SSean Hefty
rdma_addr_set_dgid(struct rdma_dev_addr * dev_addr,union ib_gid * gid)1696f8372b6SSean Hefty static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
17007ebafbaSTom Tucker {
1716f8372b6SSean Hefty memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
17207ebafbaSTom Tucker }
17307ebafbaSTom Tucker
iboe_get_mtu(int mtu)1743c86aa70SEli Cohen static inline enum ib_mtu iboe_get_mtu(int mtu)
1753c86aa70SEli Cohen {
1763c86aa70SEli Cohen /*
17799260132SParav Pandit * Reduce IB headers from effective IBoE MTU.
1783c86aa70SEli Cohen */
17999260132SParav Pandit mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
18099260132SParav Pandit IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
18199260132SParav Pandit IB_ICRC_BYTES);
1823c86aa70SEli Cohen
1833c86aa70SEli Cohen if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
1843c86aa70SEli Cohen return IB_MTU_4096;
1853c86aa70SEli Cohen else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
1863c86aa70SEli Cohen return IB_MTU_2048;
1873c86aa70SEli Cohen else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
1883c86aa70SEli Cohen return IB_MTU_1024;
1893c86aa70SEli Cohen else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
1903c86aa70SEli Cohen return IB_MTU_512;
1913c86aa70SEli Cohen else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
1923c86aa70SEli Cohen return IB_MTU_256;
1933c86aa70SEli Cohen else
1943c86aa70SEli Cohen return 0;
1953c86aa70SEli Cohen }
1963c86aa70SEli Cohen
rdma_link_local_addr(struct in6_addr * addr)1973c86aa70SEli Cohen static inline int rdma_link_local_addr(struct in6_addr *addr)
1983c86aa70SEli Cohen {
1993c86aa70SEli Cohen if (addr->s6_addr32[0] == htonl(0xfe800000) &&
2003c86aa70SEli Cohen addr->s6_addr32[1] == 0)
2013c86aa70SEli Cohen return 1;
2023c86aa70SEli Cohen
2033c86aa70SEli Cohen return 0;
2043c86aa70SEli Cohen }
2053c86aa70SEli Cohen
rdma_get_ll_mac(struct in6_addr * addr,u8 * mac)2063c86aa70SEli Cohen static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
2073c86aa70SEli Cohen {
2083c86aa70SEli Cohen memcpy(mac, &addr->s6_addr[8], 3);
2093c86aa70SEli Cohen memcpy(mac + 3, &addr->s6_addr[13], 3);
2103c86aa70SEli Cohen mac[0] ^= 2;
2113c86aa70SEli Cohen }
2123c86aa70SEli Cohen
rdma_is_multicast_addr(struct in6_addr * addr)2133c86aa70SEli Cohen static inline int rdma_is_multicast_addr(struct in6_addr *addr)
2143c86aa70SEli Cohen {
2151c3aea2bSBart Van Assche __be32 ipv4_addr;
216be1d325aSNoa Osherovich
217be1d325aSNoa Osherovich if (addr->s6_addr[0] == 0xff)
218be1d325aSNoa Osherovich return 1;
219be1d325aSNoa Osherovich
2201c3aea2bSBart Van Assche ipv4_addr = addr->s6_addr32[3];
221be1d325aSNoa Osherovich return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
2223c86aa70SEli Cohen }
2233c86aa70SEli Cohen
rdma_get_mcast_mac(struct in6_addr * addr,u8 * mac)2243c86aa70SEli Cohen static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
2253c86aa70SEli Cohen {
2263c86aa70SEli Cohen int i;
2273c86aa70SEli Cohen
2283c86aa70SEli Cohen mac[0] = 0x33;
2293c86aa70SEli Cohen mac[1] = 0x33;
2303c86aa70SEli Cohen for (i = 2; i < 6; ++i)
2313c86aa70SEli Cohen mac[i] = addr->s6_addr[i + 10];
2323c86aa70SEli Cohen }
2333c86aa70SEli Cohen
rdma_get_vlan_id(union ib_gid * dgid)234af7bd463SEli Cohen static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
235af7bd463SEli Cohen {
236af7bd463SEli Cohen u16 vid;
237af7bd463SEli Cohen
238af7bd463SEli Cohen vid = dgid->raw[11] << 8 | dgid->raw[12];
239af7bd463SEli Cohen return vid < 0x1000 ? vid : 0xffff;
240af7bd463SEli Cohen }
241af7bd463SEli Cohen
rdma_vlan_dev_real_dev(const struct net_device * dev)242af7bd463SEli Cohen static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
243af7bd463SEli Cohen {
244d0d7b10bSParav Pandit return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
245af7bd463SEli Cohen }
246af7bd463SEli Cohen
2477025fcd3SSean Hefty #endif /* IB_ADDR_H */
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