[mirror_ubuntu-artful-kernel.git] / include / rdma / 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);

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 */
Commit	Line	Data
7025fcd3 SH	1	/*
	2	* Copyright (c) 2005 Voltaire Inc. All rights reserved.
	3	* Copyright (c) 2005 Intel Corporation. All rights reserved.
	4	*
a9474917 SH	5	* This software is available to you under a choice of one of two
	6	* licenses. You may choose to be licensed under the terms of the GNU
	7	* General Public License (GPL) Version 2, available from the file
	8	* COPYING in the main directory of this source tree, or the
	9	* OpenIB.org BSD license below:
	10	*
	11	* Redistribution and use in source and binary forms, with or
	12	* without modification, are permitted provided that the following
	13	* conditions are met:
	14	*
	15	* - Redistributions of source code must retain the above
	16	* copyright notice, this list of conditions and the following
	17	* disclaimer.
	18	*
	19	* - Redistributions in binary form must reproduce the above
	20	* copyright notice, this list of conditions and the following
	21	* disclaimer in the documentation and/or other materials
	22	* provided with the distribution.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	25	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	26	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	27	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
	28	* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	29	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
	30	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	31	* SOFTWARE.
7025fcd3 SH	32	*/
	33
	34	#if !defined(IB_ADDR_H)
	35	#define IB_ADDR_H
	36
	37	#include <linux/in.h>
	38	#include <linux/in6.h>
c4315d85	39	#include <linux/if_arp.h>
7025fcd3 SH	40	#include <linux/netdevice.h>
7025fcd3 SH	41	#include <linux/socket.h>
af7bd463	42	#include <linux/if_vlan.h>
7025fcd3	43	#include <rdma/ib_verbs.h>
3c86aa70	44	#include <rdma/ib_pack.h>
7025fcd3	45
7a118df3 SH	46	struct rdma_addr_client {
	47	atomic_t refcount;
	48	struct completion comp;
	49	};
	50
	51	/**
	52	* rdma_addr_register_client - Register an address client.
	53	*/
	54	void rdma_addr_register_client(struct rdma_addr_client *client);
	55
	56	/**
	57	* rdma_addr_unregister_client - Deregister an address client.
	58	* @client: Client object to deregister.
	59	*/
	60	void rdma_addr_unregister_client(struct rdma_addr_client *client);
	61
7025fcd3 SH	62	struct rdma_dev_addr {
	63	unsigned char src_dev_addr[MAX_ADDR_LEN];
	64	unsigned char dst_dev_addr[MAX_ADDR_LEN];
	65	unsigned char broadcast[MAX_ADDR_LEN];
c4315d85	66	unsigned short dev_type;
6266ed6e	67	int bound_dev_if;
3c86aa70	68	enum rdma_transport_type transport;
7025fcd3 SH	69	};
	70
	71	/**
	72	* rdma_translate_ip - Translate a local IP address to an RDMA hardware
	73	* address.
	74	*/
	75	int rdma_translate_ip(struct sockaddr addr, struct rdma_dev_addr dev_addr);
	76
	77	/**
	78	* rdma_resolve_ip - Resolve source and destination IP addresses to
	79	* RDMA hardware addresses.
7a118df3	80	* @client: Address client associated with request.
7025fcd3 SH	81	* @src_addr: An optional source address to use in the resolution. If a
	82	* source address is not provided, a usable address will be returned via
	83	* the callback.
	84	* @dst_addr: The destination address to resolve.
	85	* @addr: A reference to a data location that will receive the resolved
	86	* addresses. The data location must remain valid until the callback has
	87	* been invoked.
	88	* @timeout_ms: Amount of time to wait for the address resolution to complete.
	89	* @callback: Call invoked once address resolution has completed, timed out,
	90	* or been canceled. A status of 0 indicates success.
	91	* @context: User-specified context associated with the call.
	92	*/
7a118df3 SH	93	int rdma_resolve_ip(struct rdma_addr_client *client,
7a118df3 SH	94	struct sockaddr src_addr, struct sockaddr dst_addr,
7025fcd3 SH	95	struct rdma_dev_addr *addr, int timeout_ms,
	96	void (callback)(int status, struct sockaddr src_addr,
	97	struct rdma_dev_addr addr, void context),
	98	void *context);
	99
	100	void rdma_addr_cancel(struct rdma_dev_addr *addr);
	101
07ebafba TT	102	int rdma_copy_addr(struct rdma_dev_addr dev_addr, struct net_device dev,
	103	const unsigned char *dst_dev_addr);
	104
ef560861	105	int rdma_addr_size(struct sockaddr *addr);
7025fcd3 SH	106
	107	static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
	108	{
	109	return ((u16)dev_addr->broadcast[8] << 8) \| (u16)dev_addr->broadcast[9];
	110	}
	111
	112	static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
	113	{
	114	dev_addr->broadcast[8] = pkey >> 8;
	115	dev_addr->broadcast[9] = (unsigned char) pkey;
	116	}
	117
faec2f7b SH	118	static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
	119	union ib_gid *gid)
	120	{
	121	memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
	122	}
	123
6f8372b6	124	static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
7025fcd3	125	{
6f8372b6	126	return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
7025fcd3 SH	127	}
7025fcd3 SH	128
af7bd463	129	static inline void iboe_mac_vlan_to_ll(union ib_gid gid, u8 mac, u16 vid)
3c86aa70 EC	130	{
	131	memset(gid->raw, 0, 16);
	132	((__be32 ) gid->raw) = cpu_to_be32(0xfe800000);
af7bd463 EC	133	if (vid < 0x1000) {
	134	gid->raw[12] = vid & 0xff;
	135	gid->raw[11] = vid >> 8;
	136	} else {
	137	gid->raw[12] = 0xfe;
	138	gid->raw[11] = 0xff;
	139	}
3c86aa70 EC	140	memcpy(gid->raw + 13, mac + 3, 3);
	141	memcpy(gid->raw + 8, mac, 3);
	142	gid->raw[8] ^= 2;
	143	}
	144
af7bd463 EC	145	static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
	146	{
	147	return dev->priv_flags & IFF_802_1Q_VLAN ?
	148	vlan_dev_vlan_id(dev) : 0xffff;
	149	}
	150
3c86aa70 EC	151	static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
	152	union ib_gid *gid)
	153	{
af7bd463 EC	154	struct net_device *dev;
	155	u16 vid = 0xffff;
	156
	157	dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
	158	if (dev) {
	159	vid = rdma_vlan_dev_vlan_id(dev);
	160	dev_put(dev);
	161	}
	162
	163	iboe_mac_vlan_to_ll(gid, dev_addr->src_dev_addr, vid);
3c86aa70 EC	164	}
3c86aa70 EC	165
6f8372b6	166	static inline void rdma_addr_get_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	167	{
3c86aa70 EC	168	if (dev_addr->transport == RDMA_TRANSPORT_IB &&
	169	dev_addr->dev_type != ARPHRD_INFINIBAND)
	170	iboe_addr_get_sgid(dev_addr, gid);
	171	else
	172	memcpy(gid, dev_addr->src_dev_addr +
	173	rdma_addr_gid_offset(dev_addr), sizeof *gid);
7025fcd3 SH	174	}
7025fcd3 SH	175
6f8372b6	176	static inline void rdma_addr_set_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	177	{
6f8372b6	178	memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
7025fcd3 SH	179	}
7025fcd3 SH	180
6f8372b6	181	static inline void rdma_addr_get_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	182	{
6f8372b6	183	memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
7025fcd3 SH	184	}
7025fcd3 SH	185
6f8372b6	186	static inline void rdma_addr_set_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
07ebafba	187	{
6f8372b6	188	memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
07ebafba TT	189	}
07ebafba TT	190
3c86aa70 EC	191	static inline enum ib_mtu iboe_get_mtu(int mtu)
	192	{
	193	/*
	194	* reduce IB headers from effective IBoE MTU. 28 stands for
	195	* atomic header which is the biggest possible header after BTH
	196	*/
	197	mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
	198
	199	if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
	200	return IB_MTU_4096;
	201	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
	202	return IB_MTU_2048;
	203	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
	204	return IB_MTU_1024;
	205	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
	206	return IB_MTU_512;
	207	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
	208	return IB_MTU_256;
	209	else
	210	return 0;
	211	}
	212
	213	static inline int iboe_get_rate(struct net_device *dev)
	214	{
	215	struct ethtool_cmd cmd;
8ae6daca	216	u32 speed;
4bc71cb9	217	int err;
3c86aa70	218
4bc71cb9 JP	219	rtnl_lock();
	220	err = __ethtool_get_settings(dev, &cmd);
	221	rtnl_unlock();
	222	if (err)
3c86aa70 EC	223	return IB_RATE_PORT_CURRENT;
3c86aa70 EC	224
8ae6daca DD	225	speed = ethtool_cmd_speed(&cmd);
8ae6daca DD	226	if (speed >= 40000)
3c86aa70	227	return IB_RATE_40_GBPS;
8ae6daca	228	else if (speed >= 30000)
3c86aa70	229	return IB_RATE_30_GBPS;
8ae6daca	230	else if (speed >= 20000)
3c86aa70	231	return IB_RATE_20_GBPS;
8ae6daca	232	else if (speed >= 10000)
3c86aa70 EC	233	return IB_RATE_10_GBPS;
	234	else
	235	return IB_RATE_PORT_CURRENT;
	236	}
	237
	238	static inline int rdma_link_local_addr(struct in6_addr *addr)
	239	{
	240	if (addr->s6_addr32[0] == htonl(0xfe800000) &&
	241	addr->s6_addr32[1] == 0)
	242	return 1;
	243
	244	return 0;
	245	}
	246
	247	static inline void rdma_get_ll_mac(struct in6_addr addr, u8 mac)
	248	{
	249	memcpy(mac, &addr->s6_addr[8], 3);
	250	memcpy(mac + 3, &addr->s6_addr[13], 3);
	251	mac[0] ^= 2;
	252	}
	253
	254	static inline int rdma_is_multicast_addr(struct in6_addr *addr)
	255	{
	256	return addr->s6_addr[0] == 0xff;
	257	}
	258
	259	static inline void rdma_get_mcast_mac(struct in6_addr addr, u8 mac)
	260	{
	261	int i;
	262
	263	mac[0] = 0x33;
	264	mac[1] = 0x33;
	265	for (i = 2; i < 6; ++i)
	266	mac[i] = addr->s6_addr[i + 10];
	267	}
	268
af7bd463 EC	269	static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
	270	{
	271	u16 vid;
	272
	273	vid = dgid->raw[11] << 8 \| dgid->raw[12];
	274	return vid < 0x1000 ? vid : 0xffff;
	275	}
	276
	277	static inline struct net_device rdma_vlan_dev_real_dev(const struct net_device dev)
	278	{
	279	return dev->priv_flags & IFF_802_1Q_VLAN ?
c89d1bed	280	vlan_dev_real_dev(dev) : NULL;
af7bd463 EC	281	}
af7bd463 EC	282
7025fcd3	283	#endif /* IB_ADDR_H */