/*
* 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);
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 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 */
