/* * Copyright (c) 2005 Voltaire Inc. All rights reserved. * Copyright (c) 2005 Intel Corporation. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef IB_ADDR_H #define IB_ADDR_H #include #include #include #include #include #include #include #include #include #include #include struct rdma_addr_client { atomic_t refcount; struct completion comp; }; /** * rdma_addr_register_client - Register an address client. */ void rdma_addr_register_client(struct rdma_addr_client *client); /** * rdma_addr_unregister_client - Deregister an address client. * @client: Client object to deregister. */ void rdma_addr_unregister_client(struct rdma_addr_client *client); 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; }; /** * rdma_translate_ip - Translate a local IP address to an RDMA hardware * address. */ int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr, u16 *vlan_id); /** * rdma_resolve_ip - Resolve source and destination IP addresses to * RDMA hardware addresses. * @client: Address client associated with request. * @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. * @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. * @context: User-specified context associated with the call. */ int rdma_resolve_ip(struct rdma_addr_client *client, struct sockaddr *src_addr, struct sockaddr *dst_addr, struct rdma_dev_addr *addr, int timeout_ms, void (*callback)(int status, struct sockaddr *src_addr, struct rdma_dev_addr *addr, void *context), void *context); void rdma_addr_cancel(struct rdma_dev_addr *addr); int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, const unsigned char *dst_dev_addr); int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id, u32 scope_id); int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *smac, u16 *vlan_id, u32 scope_id); static inline int ip_addr_size(struct sockaddr *addr) { return addr->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in); } 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) { uint16_t tag; if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) return 0xffff; return tag; } 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: memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16); break; default: return -EINVAL; } return 0; } /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ static inline int rdma_gid2ip(struct sockaddr *out, union ib_gid *gid, uint32_t scope_id) { 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_len = 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_len = sizeof(*out_in); out_in->sin6_family = AF_INET6; memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); if (scope_id < 256 && IN6_IS_SCOPE_LINKLOCAL(&out_in->sin6_addr)) out_in->sin6_scope_id = scope_id; } return 0; } u32 rdma_get_ipv6_scope_id(struct ib_device *ib, u8 port_num); /* This func is called only in loopback ip address (127.0.0.1) * case in which sgid is not relevant */ static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) { } static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) { if (dev_addr->transport == RDMA_TRANSPORT_IB && dev_addr->dev_type != ARPHRD_INFINIBAND) iboe_addr_get_sgid(dev_addr, gid); else 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. 28 stands for * atomic header which is the biggest possible header after BTH */ mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 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 iboe_get_rate(struct net_device *dev) { if (dev->if_baudrate >= IF_Gbps(40)) return IB_RATE_40_GBPS; else if (dev->if_baudrate >= IF_Gbps(30)) return IB_RATE_30_GBPS; else if (dev->if_baudrate >= IF_Gbps(20)) return IB_RATE_20_GBPS; else if (dev->if_baudrate >= IF_Gbps(10)) return IB_RATE_10_GBPS; else return IB_RATE_PORT_CURRENT; } 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) { return addr->s6_addr[0] == 0xff; } static inline void resolve_mcast_mac(struct in6_addr *addr, u8 *mac) { if (addr->s6_addr[0] != 0xff) return; #ifdef DUAL_MODE_MCAST_MAC if (addr->s6_addr[1] == 0x0e) /* IPv4 */ ip_eth_mc_map(addr->s6_addr32[3], mac); else #endif ipv6_eth_mc_map(addr, mac); } 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 VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); } #endif /* IB_ADDR_H */