/* * 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. */ #if !defined(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/socket.h> #include <linux/if_vlan.h> #include <rdma/ib_verbs.h> #include <rdma/ib_pack.h> 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); /** * 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_size(struct sockaddr *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 void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid) { memset(gid->raw, 0, 16); *((__be32 *) gid->raw) = cpu_to_be32(0xfe800000); if (vid < 0x1000) { gid->raw[12] = vid & 0xff; gid->raw[11] = vid >> 8; } else { gid->raw[12] = 0xfe; gid->raw[11] = 0xff; } memcpy(gid->raw + 13, mac + 3, 3); memcpy(gid->raw + 8, mac, 3); gid->raw[8] ^= 2; } static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) { return dev->priv_flags & IFF_802_1Q_VLAN ? vlan_dev_vlan_id(dev) : 0xffff; } static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) { struct net_device *dev; u16 vid = 0xffff; dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); if (dev) { vid = rdma_vlan_dev_vlan_id(dev); dev_put(dev); } iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid); } 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) { struct ethtool_cmd cmd; u32 speed; int err; rtnl_lock(); err = __ethtool_get_settings(dev, &cmd); rtnl_unlock(); if (err) return IB_RATE_PORT_CURRENT; speed = ethtool_cmd_speed(&cmd); if (speed >= 40000) return IB_RATE_40_GBPS; else if (speed >= 30000) return IB_RATE_30_GBPS; else if (speed >= 20000) return IB_RATE_20_GBPS; else if (speed >= 10000) 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 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 dev->priv_flags & IFF_802_1Q_VLAN ? vlan_dev_real_dev(dev) : NULL; } #endif /* IB_ADDR_H */