[mirror_ubuntu-hirsute-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/inetdevice.h>
#include <linux/socket.h>
#include <linux/if_vlan.h>
#include <net/ipv6.h>
#include <net/if_inet6.h>
#include <net/ip.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_pack.h>
#include <net/ipv6.h>
#include <net/net_namespace.h>

/**
 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
 * @src_dev_addr:	Source MAC address.
 * @dst_dev_addr:	Destination MAC address.
 * @broadcast:		Broadcast address of the device.
 * @dev_type:		The interface hardware type of the device.
 * @bound_dev_if:	An optional device interface index.
 * @transport:		The transport type used.
 * @net:		Network namespace containing the bound_dev_if net_dev.
 * @sgid_attr:		GID attribute to use for identified SGID
 */
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;
	struct net *net;
	const struct ib_gid_attr *sgid_attr;
	enum rdma_network_type network;
	int hoplimit;
};

/**
 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
 *   address.
 *
 * The dev_addr->net field must be initialized.
 */
int rdma_translate_ip(const struct sockaddr *addr,
		      struct rdma_dev_addr *dev_addr);

/**
 * rdma_resolve_ip - Resolve source and destination IP addresses to
 *   RDMA hardware addresses.
 * @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. The net field of the addr struct must be valid.
 * @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 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);

void rdma_copy_addr(struct rdma_dev_addr *dev_addr,
		    const struct net_device *dev,
		    const unsigned char *dst_dev_addr);

int rdma_addr_size(struct sockaddr *addr);
int rdma_addr_size_in6(struct sockaddr_in6 *addr);
int rdma_addr_size_kss(struct __kernel_sockaddr_storage *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 u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
{
	return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
}

static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
{
	switch (addr->sa_family) {
	case AF_INET:
		ipv6_addr_set_v4mapped(((struct sockaddr_in *)
					addr)->sin_addr.s_addr,
				       (struct in6_addr *)gid);
		break;
	case AF_INET6:
		*(struct in6_addr *)&gid->raw =
			((struct sockaddr_in6 *)addr)->sin6_addr;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
{
	if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
		struct sockaddr_in *out_in = (struct sockaddr_in *)out;
		memset(out_in, 0, sizeof(*out_in));
		out_in->sin_family = AF_INET;
		memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
	} else {
		struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
		memset(out_in, 0, sizeof(*out_in));
		out_in->sin6_family = AF_INET6;
		memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
	}
}

/*
 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
 * They are not applicable to RoCE.
 * RoCE GIDs are derived from the IP addresses.
 */
static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
{
	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.
	 */
	mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
		     IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
		     IB_ICRC_BYTES);

	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_link_ksettings cmd;
	int err;

	rtnl_lock();
	err = __ethtool_get_link_ksettings(dev, &cmd);
	rtnl_unlock();
	if (err)
		return IB_RATE_PORT_CURRENT;

	if (cmd.base.speed >= 40000)
		return IB_RATE_40_GBPS;
	else if (cmd.base.speed >= 30000)
		return IB_RATE_30_GBPS;
	else if (cmd.base.speed >= 20000)
		return IB_RATE_20_GBPS;
	else if (cmd.base.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)
{
	__be32 ipv4_addr;

	if (addr->s6_addr[0] == 0xff)
		return 1;

	ipv4_addr = addr->s6_addr32[3];
	return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
}

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 is_vlan_dev(dev) ? 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	40	#include <linux/netdevice.h>
7b85627b	41	#include <linux/inetdevice.h>
7025fcd3	42	#include <linux/socket.h>
af7bd463	43	#include <linux/if_vlan.h>
7b85627b MS	44	#include <net/ipv6.h>
	45	#include <net/if_inet6.h>
	46	#include <net/ip.h>
7025fcd3	47	#include <rdma/ib_verbs.h>
3c86aa70	48	#include <rdma/ib_pack.h>
dd5f03be	49	#include <net/ipv6.h>
565edd1d	50	#include <net/net_namespace.h>
7025fcd3	51
565edd1d GS	52	/**
	53	* struct rdma_dev_addr - Contains resolved RDMA hardware addresses
	54	* @src_dev_addr: Source MAC address.
	55	* @dst_dev_addr: Destination MAC address.
	56	* @broadcast: Broadcast address of the device.
	57	* @dev_type: The interface hardware type of the device.
	58	* @bound_dev_if: An optional device interface index.
	59	* @transport: The transport type used.
	60	* @net: Network namespace containing the bound_dev_if net_dev.
4ed13a5f	61	* @sgid_attr: GID attribute to use for identified SGID
565edd1d	62	*/
7025fcd3 SH	63	struct rdma_dev_addr {
	64	unsigned char src_dev_addr[MAX_ADDR_LEN];
	65	unsigned char dst_dev_addr[MAX_ADDR_LEN];
	66	unsigned char broadcast[MAX_ADDR_LEN];
c4315d85	67	unsigned short dev_type;
6266ed6e	68	int bound_dev_if;
3c86aa70	69	enum rdma_transport_type transport;
565edd1d	70	struct net *net;
4ed13a5f	71	const struct ib_gid_attr *sgid_attr;
c865f246	72	enum rdma_network_type network;
c3efe750	73	int hoplimit;
7025fcd3 SH	74	};
	75
	76	/**
	77	* rdma_translate_ip - Translate a local IP address to an RDMA hardware
	78	* address.
565edd1d GS	79	*
565edd1d GS	80	* The dev_addr->net field must be initialized.
7025fcd3	81	*/
20029832	82	int rdma_translate_ip(const struct sockaddr *addr,
575c7e58	83	struct rdma_dev_addr *dev_addr);
7025fcd3 SH	84
	85	/**
	86	* rdma_resolve_ip - Resolve source and destination IP addresses to
	87	* RDMA hardware addresses.
	88	* @src_addr: An optional source address to use in the resolution. If a
	89	* source address is not provided, a usable address will be returned via
	90	* the callback.
	91	* @dst_addr: The destination address to resolve.
	92	* @addr: A reference to a data location that will receive the resolved
	93	* addresses. The data location must remain valid until the callback has
565edd1d	94	* been invoked. The net field of the addr struct must be valid.
7025fcd3 SH	95	* @timeout_ms: Amount of time to wait for the address resolution to complete.
	96	* @callback: Call invoked once address resolution has completed, timed out,
	97	* or been canceled. A status of 0 indicates success.
	98	* @context: User-specified context associated with the call.
	99	*/
ee6548d1	100	int rdma_resolve_ip(struct sockaddr src_addr, struct sockaddr dst_addr,
7025fcd3 SH	101	struct rdma_dev_addr *addr, int timeout_ms,
	102	void (callback)(int status, struct sockaddr src_addr,
	103	struct rdma_dev_addr addr, void context),
	104	void *context);
	105
	106	void rdma_addr_cancel(struct rdma_dev_addr *addr);
	107
e08ce2e8 YS	108	void rdma_copy_addr(struct rdma_dev_addr *dev_addr,
	109	const struct net_device *dev,
	110	const unsigned char *dst_dev_addr);
07ebafba	111
ef560861	112	int rdma_addr_size(struct sockaddr *addr);
84652aef RD	113	int rdma_addr_size_in6(struct sockaddr_in6 *addr);
84652aef RD	114	int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
7025fcd3 SH	115
	116	static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
	117	{
	118	return ((u16)dev_addr->broadcast[8] << 8) \| (u16)dev_addr->broadcast[9];
	119	}
	120
	121	static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
	122	{
	123	dev_addr->broadcast[8] = pkey >> 8;
	124	dev_addr->broadcast[9] = (unsigned char) pkey;
	125	}
	126
faec2f7b SH	127	static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
	128	union ib_gid *gid)
	129	{
	130	memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
	131	}
	132
6f8372b6	133	static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
7025fcd3	134	{
6f8372b6	135	return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
7025fcd3 SH	136	}
7025fcd3 SH	137
7b85627b	138	static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
3c86aa70	139	{
d0d7b10b	140	return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
3c86aa70 EC	141	}
3c86aa70 EC	142
dd5f03be MB	143	static inline int rdma_ip2gid(struct sockaddr addr, union ib_gid gid)
	144	{
	145	switch (addr->sa_family) {
	146	case AF_INET:
	147	ipv6_addr_set_v4mapped(((struct sockaddr_in *)
	148	addr)->sin_addr.s_addr,
	149	(struct in6_addr *)gid);
	150	break;
	151	case AF_INET6:
5f8a4db7 AB	152	(struct in6_addr )&gid->raw =
5f8a4db7 AB	153	((struct sockaddr_in6 *)addr)->sin6_addr;
dd5f03be MB	154	break;
	155	default:
	156	return -EINVAL;
	157	}
	158	return 0;
	159	}
	160
	161	/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
73cdaaee	162	static inline void rdma_gid2ip(struct sockaddr out, const union ib_gid gid)
dd5f03be MB	163	{
	164	if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
	165	struct sockaddr_in out_in = (struct sockaddr_in )out;
	166	memset(out_in, 0, sizeof(*out_in));
	167	out_in->sin_family = AF_INET;
	168	memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
	169	} else {
	170	struct sockaddr_in6 out_in = (struct sockaddr_in6 )out;
	171	memset(out_in, 0, sizeof(*out_in));
	172	out_in->sin6_family = AF_INET6;
	173	memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
	174	}
dd5f03be MB	175	}
dd5f03be MB	176
15cbc519 PP	177	/*
	178	* rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
	179	* They are not applicable to RoCE.
	180	* RoCE GIDs are derived from the IP addresses.
	181	*/
6f8372b6	182	static inline void rdma_addr_get_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	183	{
15cbc519 PP	184	memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
15cbc519 PP	185	sizeof(*gid));
7025fcd3 SH	186	}
7025fcd3 SH	187
6f8372b6	188	static inline void rdma_addr_set_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	189	{
6f8372b6	190	memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
7025fcd3 SH	191	}
7025fcd3 SH	192
6f8372b6	193	static inline void rdma_addr_get_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	194	{
6f8372b6	195	memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
7025fcd3 SH	196	}
7025fcd3 SH	197
6f8372b6	198	static inline void rdma_addr_set_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
07ebafba	199	{
6f8372b6	200	memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
07ebafba TT	201	}
07ebafba TT	202
3c86aa70 EC	203	static inline enum ib_mtu iboe_get_mtu(int mtu)
	204	{
	205	/*
99260132	206	* Reduce IB headers from effective IBoE MTU.
3c86aa70	207	*/
99260132 PP	208	mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
	209	IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
	210	IB_ICRC_BYTES);
3c86aa70 EC	211
	212	if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
	213	return IB_MTU_4096;
	214	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
	215	return IB_MTU_2048;
	216	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
	217	return IB_MTU_1024;
	218	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
	219	return IB_MTU_512;
	220	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
	221	return IB_MTU_256;
	222	else
	223	return 0;
	224	}
	225
	226	static inline int iboe_get_rate(struct net_device *dev)
	227	{
17605b96	228	struct ethtool_link_ksettings cmd;
4bc71cb9	229	int err;
3c86aa70	230
4bc71cb9	231	rtnl_lock();
17605b96	232	err = __ethtool_get_link_ksettings(dev, &cmd);
4bc71cb9 JP	233	rtnl_unlock();
4bc71cb9 JP	234	if (err)
3c86aa70 EC	235	return IB_RATE_PORT_CURRENT;
3c86aa70 EC	236
17605b96	237	if (cmd.base.speed >= 40000)
3c86aa70	238	return IB_RATE_40_GBPS;
17605b96	239	else if (cmd.base.speed >= 30000)
3c86aa70	240	return IB_RATE_30_GBPS;
17605b96	241	else if (cmd.base.speed >= 20000)
3c86aa70	242	return IB_RATE_20_GBPS;
17605b96	243	else if (cmd.base.speed >= 10000)
3c86aa70 EC	244	return IB_RATE_10_GBPS;
	245	else
	246	return IB_RATE_PORT_CURRENT;
	247	}
	248
	249	static inline int rdma_link_local_addr(struct in6_addr *addr)
	250	{
	251	if (addr->s6_addr32[0] == htonl(0xfe800000) &&
	252	addr->s6_addr32[1] == 0)
	253	return 1;
	254
	255	return 0;
	256	}
	257
	258	static inline void rdma_get_ll_mac(struct in6_addr addr, u8 mac)
	259	{
	260	memcpy(mac, &addr->s6_addr[8], 3);
	261	memcpy(mac + 3, &addr->s6_addr[13], 3);
	262	mac[0] ^= 2;
	263	}
	264
	265	static inline int rdma_is_multicast_addr(struct in6_addr *addr)
	266	{
1c3aea2b	267	__be32 ipv4_addr;
be1d325a NO	268
	269	if (addr->s6_addr[0] == 0xff)
	270	return 1;
	271
1c3aea2b	272	ipv4_addr = addr->s6_addr32[3];
be1d325a	273	return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
3c86aa70 EC	274	}
	275
	276	static inline void rdma_get_mcast_mac(struct in6_addr addr, u8 mac)
	277	{
	278	int i;
	279
	280	mac[0] = 0x33;
	281	mac[1] = 0x33;
	282	for (i = 2; i < 6; ++i)
	283	mac[i] = addr->s6_addr[i + 10];
	284	}
	285
af7bd463 EC	286	static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
	287	{
	288	u16 vid;
	289
	290	vid = dgid->raw[11] << 8 \| dgid->raw[12];
	291	return vid < 0x1000 ? vid : 0xffff;
	292	}
	293
	294	static inline struct net_device rdma_vlan_dev_real_dev(const struct net_device dev)
	295	{
d0d7b10b	296	return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
af7bd463 EC	297	}
af7bd463 EC	298
7025fcd3	299	#endif /* IB_ADDR_H */