/* * 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 */