288 lines
8.2 KiB
C
288 lines
8.2 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#if !defined(IB_ADDR_H)
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#define IB_ADDR_H
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/socket.h>
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#include <linux/if_vlan.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_pack.h>
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struct rdma_addr_client {
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atomic_t refcount;
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struct completion comp;
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};
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/**
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* rdma_addr_register_client - Register an address client.
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*/
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void rdma_addr_register_client(struct rdma_addr_client *client);
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/**
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* rdma_addr_unregister_client - Deregister an address client.
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* @client: Client object to deregister.
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*/
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void rdma_addr_unregister_client(struct rdma_addr_client *client);
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struct rdma_dev_addr {
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unsigned char src_dev_addr[MAX_ADDR_LEN];
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unsigned char dst_dev_addr[MAX_ADDR_LEN];
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unsigned char broadcast[MAX_ADDR_LEN];
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unsigned short dev_type;
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int bound_dev_if;
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enum rdma_transport_type transport;
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};
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/**
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* rdma_translate_ip - Translate a local IP address to an RDMA hardware
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* address.
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*/
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int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr);
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/**
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* rdma_resolve_ip - Resolve source and destination IP addresses to
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* RDMA hardware addresses.
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* @client: Address client associated with request.
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* @src_addr: An optional source address to use in the resolution. If a
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* source address is not provided, a usable address will be returned via
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* the callback.
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* @dst_addr: The destination address to resolve.
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* @addr: A reference to a data location that will receive the resolved
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* addresses. The data location must remain valid until the callback has
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* been invoked.
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* @timeout_ms: Amount of time to wait for the address resolution to complete.
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* @callback: Call invoked once address resolution has completed, timed out,
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* or been canceled. A status of 0 indicates success.
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* @context: User-specified context associated with the call.
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*/
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int rdma_resolve_ip(struct rdma_addr_client *client,
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struct sockaddr *src_addr, struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, int timeout_ms,
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context),
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void *context);
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void rdma_addr_cancel(struct rdma_dev_addr *addr);
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int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
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const unsigned char *dst_dev_addr);
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static inline int ip_addr_size(struct sockaddr *addr)
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{
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return addr->sa_family == AF_INET6 ?
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sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in);
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}
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static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
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{
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return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
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}
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static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
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{
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dev_addr->broadcast[8] = pkey >> 8;
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dev_addr->broadcast[9] = (unsigned char) pkey;
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}
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static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
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union ib_gid *gid)
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{
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memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
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}
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static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
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{
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return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
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}
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static inline void iboe_mac_vlan_to_ll(union ib_gid *gid, u8 *mac, u16 vid)
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{
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memset(gid->raw, 0, 16);
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*((__be32 *) gid->raw) = cpu_to_be32(0xfe800000);
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if (vid < 0x1000) {
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gid->raw[12] = vid & 0xff;
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gid->raw[11] = vid >> 8;
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} else {
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gid->raw[12] = 0xfe;
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gid->raw[11] = 0xff;
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}
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memcpy(gid->raw + 13, mac + 3, 3);
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memcpy(gid->raw + 8, mac, 3);
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gid->raw[8] ^= 2;
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}
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static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
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{
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return dev->priv_flags & IFF_802_1Q_VLAN ?
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vlan_dev_vlan_id(dev) : 0xffff;
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}
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static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
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union ib_gid *gid)
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{
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struct net_device *dev;
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u16 vid = 0xffff;
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dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
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if (dev) {
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vid = rdma_vlan_dev_vlan_id(dev);
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dev_put(dev);
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}
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iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid);
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}
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static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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if (dev_addr->transport == RDMA_TRANSPORT_IB &&
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dev_addr->dev_type != ARPHRD_INFINIBAND)
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iboe_addr_get_sgid(dev_addr, gid);
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else
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memcpy(gid, dev_addr->src_dev_addr +
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rdma_addr_gid_offset(dev_addr), sizeof *gid);
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}
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static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
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}
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static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline enum ib_mtu iboe_get_mtu(int mtu)
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{
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/*
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* reduce IB headers from effective IBoE MTU. 28 stands for
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* atomic header which is the biggest possible header after BTH
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*/
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mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
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if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
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return IB_MTU_4096;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
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return IB_MTU_2048;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
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return IB_MTU_1024;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
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return IB_MTU_512;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
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return IB_MTU_256;
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else
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return 0;
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}
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static inline int iboe_get_rate(struct net_device *dev)
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{
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struct ethtool_cmd cmd;
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u32 speed;
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int err;
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rtnl_lock();
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err = __ethtool_get_settings(dev, &cmd);
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rtnl_unlock();
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if (err)
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return IB_RATE_PORT_CURRENT;
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speed = ethtool_cmd_speed(&cmd);
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if (speed >= 40000)
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return IB_RATE_40_GBPS;
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else if (speed >= 30000)
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return IB_RATE_30_GBPS;
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else if (speed >= 20000)
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return IB_RATE_20_GBPS;
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else if (speed >= 10000)
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return IB_RATE_10_GBPS;
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else
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return IB_RATE_PORT_CURRENT;
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}
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static inline int rdma_link_local_addr(struct in6_addr *addr)
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{
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if (addr->s6_addr32[0] == htonl(0xfe800000) &&
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addr->s6_addr32[1] == 0)
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return 1;
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return 0;
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}
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static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
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{
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memcpy(mac, &addr->s6_addr[8], 3);
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memcpy(mac + 3, &addr->s6_addr[13], 3);
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mac[0] ^= 2;
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}
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static inline int rdma_is_multicast_addr(struct in6_addr *addr)
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{
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return addr->s6_addr[0] == 0xff;
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}
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static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
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{
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int i;
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mac[0] = 0x33;
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mac[1] = 0x33;
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for (i = 2; i < 6; ++i)
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mac[i] = addr->s6_addr[i + 10];
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}
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static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
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{
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u16 vid;
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vid = dgid->raw[11] << 8 | dgid->raw[12];
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return vid < 0x1000 ? vid : 0xffff;
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}
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static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
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{
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return dev->priv_flags & IFF_802_1Q_VLAN ?
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vlan_dev_real_dev(dev) : NULL;
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}
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#endif /* IB_ADDR_H */
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