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270 lines
7.7 KiB
270 lines
7.7 KiB
/* 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/ethtool.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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