include/rdma/ib_addr.h - kernel/windcharger - Git at Google

 /*
  * 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 */
	/*
	* 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 */