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![Leon Romanovsky](/assets/img/avatar_default.png)
The header files in RDMA subsystem are dual licensed and can be described by simple SPDX tag, so replace all of them at once together with making them use the same coding style for header guard defines. Link: https://lore.kernel.org/r/20200719072521.135260-1-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
269 lines
7.6 KiB
C
269 lines
7.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*/
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#ifndef IB_ADDR_H
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#define IB_ADDR_H
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/socket.h>
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#include <linux/if_vlan.h>
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#include <net/ipv6.h>
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#include <net/if_inet6.h>
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#include <net/ip.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_pack.h>
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#include <net/net_namespace.h>
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/**
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* struct rdma_dev_addr - Contains resolved RDMA hardware addresses
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* @src_dev_addr: Source MAC address.
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* @dst_dev_addr: Destination MAC address.
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* @broadcast: Broadcast address of the device.
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* @dev_type: The interface hardware type of the device.
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* @bound_dev_if: An optional device interface index.
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* @transport: The transport type used.
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* @net: Network namespace containing the bound_dev_if net_dev.
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* @sgid_attr: GID attribute to use for identified SGID
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*/
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struct rdma_dev_addr {
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unsigned char src_dev_addr[MAX_ADDR_LEN];
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unsigned char dst_dev_addr[MAX_ADDR_LEN];
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unsigned char broadcast[MAX_ADDR_LEN];
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unsigned short dev_type;
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int bound_dev_if;
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enum rdma_transport_type transport;
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struct net *net;
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const struct ib_gid_attr *sgid_attr;
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enum rdma_network_type network;
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int hoplimit;
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};
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/**
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* rdma_translate_ip - Translate a local IP address to an RDMA hardware
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* address.
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*
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* The dev_addr->net field must be initialized.
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*/
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int rdma_translate_ip(const struct sockaddr *addr,
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struct rdma_dev_addr *dev_addr);
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/**
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* rdma_resolve_ip - Resolve source and destination IP addresses to
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* RDMA hardware addresses.
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* @src_addr: An optional source address to use in the resolution. If a
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* source address is not provided, a usable address will be returned via
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* the callback.
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* @dst_addr: The destination address to resolve.
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* @addr: A reference to a data location that will receive the resolved
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* addresses. The data location must remain valid until the callback has
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* been invoked. The net field of the addr struct must be valid.
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* @timeout_ms: Amount of time to wait for the address resolution to complete.
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* @callback: Call invoked once address resolution has completed, timed out,
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* or been canceled. A status of 0 indicates success.
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* @resolve_by_gid_attr: Resolve the ip based on the GID attribute from
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* rdma_dev_addr.
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* @context: User-specified context associated with the call.
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*/
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int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, unsigned long timeout_ms,
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context),
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bool resolve_by_gid_attr, void *context);
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void rdma_addr_cancel(struct rdma_dev_addr *addr);
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int rdma_addr_size(const struct sockaddr *addr);
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int rdma_addr_size_in6(struct sockaddr_in6 *addr);
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int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
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static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
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{
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return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
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}
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static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
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{
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dev_addr->broadcast[8] = pkey >> 8;
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dev_addr->broadcast[9] = (unsigned char) pkey;
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}
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static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
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union ib_gid *gid)
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{
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memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
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}
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static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
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{
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return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
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}
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static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
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{
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return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
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}
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static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
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{
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switch (addr->sa_family) {
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case AF_INET:
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ipv6_addr_set_v4mapped(((struct sockaddr_in *)
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addr)->sin_addr.s_addr,
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(struct in6_addr *)gid);
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break;
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case AF_INET6:
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*(struct in6_addr *)&gid->raw =
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((struct sockaddr_in6 *)addr)->sin6_addr;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
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static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
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{
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if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
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struct sockaddr_in *out_in = (struct sockaddr_in *)out;
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memset(out_in, 0, sizeof(*out_in));
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out_in->sin_family = AF_INET;
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memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
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} else {
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struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
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memset(out_in, 0, sizeof(*out_in));
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out_in->sin6_family = AF_INET6;
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memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
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}
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}
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/*
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* rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
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* They are not applicable to RoCE.
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* RoCE GIDs are derived from the IP addresses.
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*/
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static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
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sizeof(*gid));
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}
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static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
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}
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static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline enum ib_mtu iboe_get_mtu(int mtu)
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{
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/*
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* Reduce IB headers from effective IBoE MTU.
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*/
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mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
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IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
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IB_ICRC_BYTES);
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if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
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return IB_MTU_4096;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
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return IB_MTU_2048;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
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return IB_MTU_1024;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
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return IB_MTU_512;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
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return IB_MTU_256;
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else
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return 0;
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}
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static inline int iboe_get_rate(struct net_device *dev)
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{
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struct ethtool_link_ksettings cmd;
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int err;
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rtnl_lock();
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err = __ethtool_get_link_ksettings(dev, &cmd);
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rtnl_unlock();
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if (err)
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return IB_RATE_PORT_CURRENT;
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if (cmd.base.speed >= 40000)
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return IB_RATE_40_GBPS;
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else if (cmd.base.speed >= 30000)
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return IB_RATE_30_GBPS;
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else if (cmd.base.speed >= 20000)
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return IB_RATE_20_GBPS;
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else if (cmd.base.speed >= 10000)
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return IB_RATE_10_GBPS;
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else
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return IB_RATE_PORT_CURRENT;
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}
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static inline int rdma_link_local_addr(struct in6_addr *addr)
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{
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if (addr->s6_addr32[0] == htonl(0xfe800000) &&
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addr->s6_addr32[1] == 0)
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return 1;
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return 0;
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}
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static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
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{
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memcpy(mac, &addr->s6_addr[8], 3);
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memcpy(mac + 3, &addr->s6_addr[13], 3);
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mac[0] ^= 2;
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}
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static inline int rdma_is_multicast_addr(struct in6_addr *addr)
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{
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__be32 ipv4_addr;
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if (addr->s6_addr[0] == 0xff)
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return 1;
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ipv4_addr = addr->s6_addr32[3];
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return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
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}
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static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
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{
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int i;
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mac[0] = 0x33;
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mac[1] = 0x33;
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for (i = 2; i < 6; ++i)
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mac[i] = addr->s6_addr[i + 10];
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}
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static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
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{
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u16 vid;
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vid = dgid->raw[11] << 8 | dgid->raw[12];
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return vid < 0x1000 ? vid : 0xffff;
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}
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static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
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{
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return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
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}
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#endif /* IB_ADDR_H */
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