[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_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 - 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.
 */
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;
	enum rdma_network_type network;
};

/**
 * 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, u16 *vlan_id);

/**
 * 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. 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 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);

int rdma_resolve_ip_route(struct sockaddr *src_addr,
			  const struct sockaddr *dst_addr,
			  struct rdma_dev_addr *addr);

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);

int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
				 const union ib_gid *dgid,
				 u8 *smac, u16 *vlan_id, int *if_index);

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 dev->priv_flags & IFF_802_1Q_VLAN ?
		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:
		memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
		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);
	}
}

static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
				      union ib_gid *gid)
{
	struct net_device *dev;
	struct in_device *ip4;

	dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
	if (dev) {
		ip4 = (struct in_device *)dev->ip_ptr;
		if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
			ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
					       (struct in6_addr *)gid);
		dev_put(dev);
	}
}

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	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
7a118df3 SH	52	struct rdma_addr_client {
	53	atomic_t refcount;
	54	struct completion comp;
	55	};
	56
	57	/**
	58	* rdma_addr_register_client - Register an address client.
	59	*/
	60	void rdma_addr_register_client(struct rdma_addr_client *client);
	61
	62	/**
	63	* rdma_addr_unregister_client - Deregister an address client.
	64	* @client: Client object to deregister.
	65	*/
	66	void rdma_addr_unregister_client(struct rdma_addr_client *client);
	67
565edd1d GS	68	/**
	69	* struct rdma_dev_addr - Contains resolved RDMA hardware addresses
	70	* @src_dev_addr: Source MAC address.
	71	* @dst_dev_addr: Destination MAC address.
	72	* @broadcast: Broadcast address of the device.
	73	* @dev_type: The interface hardware type of the device.
	74	* @bound_dev_if: An optional device interface index.
	75	* @transport: The transport type used.
	76	* @net: Network namespace containing the bound_dev_if net_dev.
	77	*/
7025fcd3 SH	78	struct rdma_dev_addr {
	79	unsigned char src_dev_addr[MAX_ADDR_LEN];
	80	unsigned char dst_dev_addr[MAX_ADDR_LEN];
	81	unsigned char broadcast[MAX_ADDR_LEN];
c4315d85	82	unsigned short dev_type;
6266ed6e	83	int bound_dev_if;
3c86aa70	84	enum rdma_transport_type transport;
565edd1d	85	struct net *net;
c865f246	86	enum rdma_network_type network;
7025fcd3 SH	87	};
	88
	89	/**
	90	* rdma_translate_ip - Translate a local IP address to an RDMA hardware
	91	* address.
565edd1d GS	92	*
565edd1d GS	93	* The dev_addr->net field must be initialized.
7025fcd3	94	*/
20029832 MB	95	int rdma_translate_ip(const struct sockaddr *addr,
20029832 MB	96	struct rdma_dev_addr dev_addr, u16 vlan_id);
7025fcd3 SH	97
	98	/**
	99	* rdma_resolve_ip - Resolve source and destination IP addresses to
	100	* RDMA hardware addresses.
7a118df3	101	* @client: Address client associated with request.
7025fcd3 SH	102	* @src_addr: An optional source address to use in the resolution. If a
	103	* source address is not provided, a usable address will be returned via
	104	* the callback.
	105	* @dst_addr: The destination address to resolve.
	106	* @addr: A reference to a data location that will receive the resolved
	107	* addresses. The data location must remain valid until the callback has
565edd1d	108	* been invoked. The net field of the addr struct must be valid.
7025fcd3 SH	109	* @timeout_ms: Amount of time to wait for the address resolution to complete.
	110	* @callback: Call invoked once address resolution has completed, timed out,
	111	* or been canceled. A status of 0 indicates success.
	112	* @context: User-specified context associated with the call.
	113	*/
7a118df3 SH	114	int rdma_resolve_ip(struct rdma_addr_client *client,
7a118df3 SH	115	struct sockaddr src_addr, struct sockaddr dst_addr,
7025fcd3 SH	116	struct rdma_dev_addr *addr, int timeout_ms,
	117	void (callback)(int status, struct sockaddr src_addr,
	118	struct rdma_dev_addr addr, void context),
	119	void *context);
	120
20029832 MB	121	int rdma_resolve_ip_route(struct sockaddr *src_addr,
	122	const struct sockaddr *dst_addr,
	123	struct rdma_dev_addr *addr);
	124
7025fcd3 SH	125	void rdma_addr_cancel(struct rdma_dev_addr *addr);
7025fcd3 SH	126
07ebafba TT	127	int rdma_copy_addr(struct rdma_dev_addr dev_addr, struct net_device dev,
	128	const unsigned char *dst_dev_addr);
	129
ef560861	130	int rdma_addr_size(struct sockaddr *addr);
7025fcd3	131
dd5f03be	132	int rdma_addr_find_smac_by_sgid(union ib_gid sgid, u8 smac, u16 *vlan_id);
f7f4b23e MB	133	int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid,
	134	const union ib_gid *dgid,
	135	u8 smac, u16 vlan_id, int *if_index);
dd5f03be	136
7025fcd3 SH	137	static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
	138	{
	139	return ((u16)dev_addr->broadcast[8] << 8) \| (u16)dev_addr->broadcast[9];
	140	}
	141
	142	static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
	143	{
	144	dev_addr->broadcast[8] = pkey >> 8;
	145	dev_addr->broadcast[9] = (unsigned char) pkey;
	146	}
	147
faec2f7b SH	148	static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
	149	union ib_gid *gid)
	150	{
	151	memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
	152	}
	153
6f8372b6	154	static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
7025fcd3	155	{
6f8372b6	156	return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
7025fcd3 SH	157	}
7025fcd3 SH	158
7b85627b	159	static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
3c86aa70	160	{
7b85627b MS	161	return dev->priv_flags & IFF_802_1Q_VLAN ?
7b85627b MS	162	vlan_dev_vlan_id(dev) : 0xffff;
3c86aa70 EC	163	}
3c86aa70 EC	164
dd5f03be MB	165	static inline int rdma_ip2gid(struct sockaddr addr, union ib_gid gid)
	166	{
	167	switch (addr->sa_family) {
	168	case AF_INET:
	169	ipv6_addr_set_v4mapped(((struct sockaddr_in *)
	170	addr)->sin_addr.s_addr,
	171	(struct in6_addr *)gid);
	172	break;
	173	case AF_INET6:
	174	memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
	175	break;
	176	default:
	177	return -EINVAL;
	178	}
	179	return 0;
	180	}
	181
	182	/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
73cdaaee	183	static inline void rdma_gid2ip(struct sockaddr out, const union ib_gid gid)
dd5f03be MB	184	{
	185	if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
	186	struct sockaddr_in out_in = (struct sockaddr_in )out;
	187	memset(out_in, 0, sizeof(*out_in));
	188	out_in->sin_family = AF_INET;
	189	memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
	190	} else {
	191	struct sockaddr_in6 out_in = (struct sockaddr_in6 )out;
	192	memset(out_in, 0, sizeof(*out_in));
	193	out_in->sin6_family = AF_INET6;
	194	memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
	195	}
dd5f03be MB	196	}
dd5f03be MB	197
3c86aa70 EC	198	static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
	199	union ib_gid *gid)
	200	{
af7bd463	201	struct net_device *dev;
7b85627b	202	struct in_device *ip4;
af7bd463 EC	203
	204	dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
	205	if (dev) {
7b85627b MS	206	ip4 = (struct in_device *)dev->ip_ptr;
	207	if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
	208	ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
	209	(struct in6_addr *)gid);
af7bd463 EC	210	dev_put(dev);
af7bd463 EC	211	}
3c86aa70 EC	212	}
3c86aa70 EC	213
6f8372b6	214	static inline void rdma_addr_get_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	215	{
3c86aa70 EC	216	if (dev_addr->transport == RDMA_TRANSPORT_IB &&
	217	dev_addr->dev_type != ARPHRD_INFINIBAND)
	218	iboe_addr_get_sgid(dev_addr, gid);
	219	else
	220	memcpy(gid, dev_addr->src_dev_addr +
	221	rdma_addr_gid_offset(dev_addr), sizeof *gid);
7025fcd3 SH	222	}
7025fcd3 SH	223
6f8372b6	224	static inline void rdma_addr_set_sgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	225	{
6f8372b6	226	memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
7025fcd3 SH	227	}
7025fcd3 SH	228
6f8372b6	229	static inline void rdma_addr_get_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
7025fcd3	230	{
6f8372b6	231	memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
7025fcd3 SH	232	}
7025fcd3 SH	233
6f8372b6	234	static inline void rdma_addr_set_dgid(struct rdma_dev_addr dev_addr, union ib_gid gid)
07ebafba	235	{
6f8372b6	236	memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
07ebafba TT	237	}
07ebafba TT	238
3c86aa70 EC	239	static inline enum ib_mtu iboe_get_mtu(int mtu)
	240	{
	241	/*
	242	* reduce IB headers from effective IBoE MTU. 28 stands for
	243	* atomic header which is the biggest possible header after BTH
	244	*/
	245	mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
	246
	247	if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
	248	return IB_MTU_4096;
	249	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
	250	return IB_MTU_2048;
	251	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
	252	return IB_MTU_1024;
	253	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
	254	return IB_MTU_512;
	255	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
	256	return IB_MTU_256;
	257	else
	258	return 0;
	259	}
	260
	261	static inline int iboe_get_rate(struct net_device *dev)
	262	{
	263	struct ethtool_cmd cmd;
8ae6daca	264	u32 speed;
4bc71cb9	265	int err;
3c86aa70	266
4bc71cb9 JP	267	rtnl_lock();
	268	err = __ethtool_get_settings(dev, &cmd);
	269	rtnl_unlock();
	270	if (err)
3c86aa70 EC	271	return IB_RATE_PORT_CURRENT;
3c86aa70 EC	272
8ae6daca DD	273	speed = ethtool_cmd_speed(&cmd);
8ae6daca DD	274	if (speed >= 40000)
3c86aa70	275	return IB_RATE_40_GBPS;
8ae6daca	276	else if (speed >= 30000)
3c86aa70	277	return IB_RATE_30_GBPS;
8ae6daca	278	else if (speed >= 20000)
3c86aa70	279	return IB_RATE_20_GBPS;
8ae6daca	280	else if (speed >= 10000)
3c86aa70 EC	281	return IB_RATE_10_GBPS;
	282	else
	283	return IB_RATE_PORT_CURRENT;
	284	}
	285
	286	static inline int rdma_link_local_addr(struct in6_addr *addr)
	287	{
	288	if (addr->s6_addr32[0] == htonl(0xfe800000) &&
	289	addr->s6_addr32[1] == 0)
	290	return 1;
	291
	292	return 0;
	293	}
	294
	295	static inline void rdma_get_ll_mac(struct in6_addr addr, u8 mac)
	296	{
	297	memcpy(mac, &addr->s6_addr[8], 3);
	298	memcpy(mac + 3, &addr->s6_addr[13], 3);
	299	mac[0] ^= 2;
	300	}
	301
	302	static inline int rdma_is_multicast_addr(struct in6_addr *addr)
	303	{
	304	return addr->s6_addr[0] == 0xff;
	305	}
	306
	307	static inline void rdma_get_mcast_mac(struct in6_addr addr, u8 mac)
	308	{
	309	int i;
	310
	311	mac[0] = 0x33;
	312	mac[1] = 0x33;
	313	for (i = 2; i < 6; ++i)
	314	mac[i] = addr->s6_addr[i + 10];
	315	}
	316
af7bd463 EC	317	static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
	318	{
	319	u16 vid;
	320
	321	vid = dgid->raw[11] << 8 \| dgid->raw[12];
	322	return vid < 0x1000 ? vid : 0xffff;
	323	}
	324
	325	static inline struct net_device rdma_vlan_dev_real_dev(const struct net_device dev)
	326	{
	327	return dev->priv_flags & IFF_802_1Q_VLAN ?
c89d1bed	328	vlan_dev_real_dev(dev) : NULL;
af7bd463 EC	329	}
af7bd463 EC	330
7025fcd3	331	#endif /* IB_ADDR_H */