| /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ |
| /* |
| * Copyright (c) 2005 Voltaire Inc. All rights reserved. |
| * Copyright (c) 2005 Intel Corporation. All rights reserved. |
| */ |
| |
| #ifndef IB_ADDR_H |
| #define IB_ADDR_H |
| |
| #include <linux/in.h> |
| #include <linux/in6.h> |
| #include <linux/if_arp.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/socket.h> |
| #include <linux/if_vlan.h> |
| #include <net/ipv6.h> |
| #include <net/if_inet6.h> |
| #include <net/ip.h> |
| #include <rdma/ib_verbs.h> |
| #include <rdma/ib_pack.h> |
| #include <net/net_namespace.h> |
| |
| /** |
| * struct rdma_dev_addr - Contains resolved RDMA hardware addresses |
| * @src_dev_addr: Source MAC address. |
| * @dst_dev_addr: Destination MAC address. |
| * @broadcast: Broadcast address of the device. |
| * @dev_type: The interface hardware type of the device. |
| * @bound_dev_if: An optional device interface index. |
| * @transport: The transport type used. |
| * @net: Network namespace containing the bound_dev_if net_dev. |
| * @sgid_attr: GID attribute to use for identified SGID |
| */ |
| struct rdma_dev_addr { |
| unsigned char src_dev_addr[MAX_ADDR_LEN]; |
| unsigned char dst_dev_addr[MAX_ADDR_LEN]; |
| unsigned char broadcast[MAX_ADDR_LEN]; |
| unsigned short dev_type; |
| int bound_dev_if; |
| enum rdma_transport_type transport; |
| struct net *net; |
| const struct ib_gid_attr *sgid_attr; |
| enum rdma_network_type network; |
| int hoplimit; |
| }; |
| |
| /** |
| * rdma_translate_ip - Translate a local IP address to an RDMA hardware |
| * address. |
| * |
| * The dev_addr->net field must be initialized. |
| */ |
| int rdma_translate_ip(const struct sockaddr *addr, |
| struct rdma_dev_addr *dev_addr); |
| |
| /** |
| * rdma_resolve_ip - Resolve source and destination IP addresses to |
| * RDMA hardware addresses. |
| * @src_addr: An optional source address to use in the resolution. If a |
| * source address is not provided, a usable address will be returned via |
| * the callback. |
| * @dst_addr: The destination address to resolve. |
| * @addr: A reference to a data location that will receive the resolved |
| * addresses. The data location must remain valid until the callback has |
| * been invoked. The net field of the addr struct must be valid. |
| * @timeout_ms: Amount of time to wait for the address resolution to complete. |
| * @callback: Call invoked once address resolution has completed, timed out, |
| * or been canceled. A status of 0 indicates success. |
| * @resolve_by_gid_attr: Resolve the ip based on the GID attribute from |
| * rdma_dev_addr. |
| * @context: User-specified context associated with the call. |
| */ |
| int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr, |
| struct rdma_dev_addr *addr, unsigned long timeout_ms, |
| void (*callback)(int status, struct sockaddr *src_addr, |
| struct rdma_dev_addr *addr, void *context), |
| bool resolve_by_gid_attr, void *context); |
| |
| void rdma_addr_cancel(struct rdma_dev_addr *addr); |
| |
| int rdma_addr_size(const struct sockaddr *addr); |
| int rdma_addr_size_in6(struct sockaddr_in6 *addr); |
| int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr); |
| |
| static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) |
| { |
| return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; |
| } |
| |
| static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) |
| { |
| dev_addr->broadcast[8] = pkey >> 8; |
| dev_addr->broadcast[9] = (unsigned char) pkey; |
| } |
| |
| static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, |
| union ib_gid *gid) |
| { |
| memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); |
| } |
| |
| static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) |
| { |
| return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; |
| } |
| |
| static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) |
| { |
| return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff; |
| } |
| |
| static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid) |
| { |
| switch (addr->sa_family) { |
| case AF_INET: |
| ipv6_addr_set_v4mapped(((struct sockaddr_in *) |
| addr)->sin_addr.s_addr, |
| (struct in6_addr *)gid); |
| break; |
| case AF_INET6: |
| *(struct in6_addr *)&gid->raw = |
| ((struct sockaddr_in6 *)addr)->sin6_addr; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ |
| static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) |
| { |
| if (ipv6_addr_v4mapped((struct in6_addr *)gid)) { |
| struct sockaddr_in *out_in = (struct sockaddr_in *)out; |
| memset(out_in, 0, sizeof(*out_in)); |
| out_in->sin_family = AF_INET; |
| memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); |
| } else { |
| struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; |
| memset(out_in, 0, sizeof(*out_in)); |
| out_in->sin6_family = AF_INET6; |
| memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); |
| } |
| } |
| |
| /* |
| * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp. |
| * They are not applicable to RoCE. |
| * RoCE GIDs are derived from the IP addresses. |
| */ |
| static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
| { |
| memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), |
| sizeof(*gid)); |
| } |
| |
| static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
| { |
| memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
| } |
| |
| static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
| { |
| memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); |
| } |
| |
| static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) |
| { |
| memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); |
| } |
| |
| static inline enum ib_mtu iboe_get_mtu(int mtu) |
| { |
| /* |
| * Reduce IB headers from effective IBoE MTU. |
| */ |
| mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES + |
| IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES + |
| IB_ICRC_BYTES); |
| |
| if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) |
| return IB_MTU_4096; |
| else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) |
| return IB_MTU_2048; |
| else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) |
| return IB_MTU_1024; |
| else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) |
| return IB_MTU_512; |
| else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) |
| return IB_MTU_256; |
| else |
| return 0; |
| } |
| |
| static inline int rdma_link_local_addr(struct in6_addr *addr) |
| { |
| if (addr->s6_addr32[0] == htonl(0xfe800000) && |
| addr->s6_addr32[1] == 0) |
| return 1; |
| |
| return 0; |
| } |
| |
| static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) |
| { |
| memcpy(mac, &addr->s6_addr[8], 3); |
| memcpy(mac + 3, &addr->s6_addr[13], 3); |
| mac[0] ^= 2; |
| } |
| |
| static inline int rdma_is_multicast_addr(struct in6_addr *addr) |
| { |
| __be32 ipv4_addr; |
| |
| if (addr->s6_addr[0] == 0xff) |
| return 1; |
| |
| ipv4_addr = addr->s6_addr32[3]; |
| return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr)); |
| } |
| |
| static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) |
| { |
| int i; |
| |
| mac[0] = 0x33; |
| mac[1] = 0x33; |
| for (i = 2; i < 6; ++i) |
| mac[i] = addr->s6_addr[i + 10]; |
| } |
| |
| static inline u16 rdma_get_vlan_id(union ib_gid *dgid) |
| { |
| u16 vid; |
| |
| vid = dgid->raw[11] << 8 | dgid->raw[12]; |
| return vid < 0x1000 ? vid : 0xffff; |
| } |
| |
| static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) |
| { |
| return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL; |
| } |
| |
| #endif /* IB_ADDR_H */ |