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linux/include/rdma/ib_pack.h
Leon Romanovsky 6bf9d8f6f0 RDMA/include: Replace license text with SPDX tags 
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>
2020-07-29 14:48:36 -03:00

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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2004 Topspin Corporation. All rights reserved.
*/
#ifndef IB_PACK_H
#define IB_PACK_H
#include <rdma/ib_verbs.h>
#include <uapi/linux/if_ether.h>
enum {
IB_LRH_BYTES = 8,
IB_ETH_BYTES = 14,
IB_VLAN_BYTES = 4,
IB_GRH_BYTES = 40,
IB_IP4_BYTES = 20,
IB_UDP_BYTES = 8,
IB_BTH_BYTES = 12,
IB_DETH_BYTES = 8,
IB_EXT_ATOMICETH_BYTES = 28,
IB_EXT_XRC_BYTES = 4,
IB_ICRC_BYTES = 4
};
struct ib_field {
size_t struct_offset_bytes;
size_t struct_size_bytes;
int offset_words;
int offset_bits;
int size_bits;
char *field_name;
};
#define RESERVED \
.field_name = "reserved"
/*
* This macro cleans up the definitions of constants for BTH opcodes.
* It is used to define constants such as IB_OPCODE_UD_SEND_ONLY,
* which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives
* the correct value.
*
* In short, user code should use the constants defined using the
* macro rather than worrying about adding together other constants.
*/
#define IB_OPCODE(transport, op) \
IB_OPCODE_ ## transport ## _ ## op = \
IB_OPCODE_ ## transport + IB_OPCODE_ ## op
enum {
/* transport types -- just used to define real constants */
IB_OPCODE_RC = 0x00,
IB_OPCODE_UC = 0x20,
IB_OPCODE_RD = 0x40,
IB_OPCODE_UD = 0x60,
/* per IBTA 1.3 vol 1 Table 38, A10.3.2 */
IB_OPCODE_CNP = 0x80,
/* Manufacturer specific */
IB_OPCODE_MSP = 0xe0,
/* operations -- just used to define real constants */
IB_OPCODE_SEND_FIRST = 0x00,
IB_OPCODE_SEND_MIDDLE = 0x01,
IB_OPCODE_SEND_LAST = 0x02,
IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03,
IB_OPCODE_SEND_ONLY = 0x04,
IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05,
IB_OPCODE_RDMA_WRITE_FIRST = 0x06,
IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07,
IB_OPCODE_RDMA_WRITE_LAST = 0x08,
IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09,
IB_OPCODE_RDMA_WRITE_ONLY = 0x0a,
IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b,
IB_OPCODE_RDMA_READ_REQUEST = 0x0c,
IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d,
IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e,
IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f,
IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10,
IB_OPCODE_ACKNOWLEDGE = 0x11,
IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12,
IB_OPCODE_COMPARE_SWAP = 0x13,
IB_OPCODE_FETCH_ADD = 0x14,
/* opcode 0x15 is reserved */
IB_OPCODE_SEND_LAST_WITH_INVALIDATE = 0x16,
IB_OPCODE_SEND_ONLY_WITH_INVALIDATE = 0x17,
/* real constants follow -- see comment about above IB_OPCODE()
macro for more details */
/* RC */
IB_OPCODE(RC, SEND_FIRST),
IB_OPCODE(RC, SEND_MIDDLE),
IB_OPCODE(RC, SEND_LAST),
IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
IB_OPCODE(RC, SEND_ONLY),
IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
IB_OPCODE(RC, RDMA_WRITE_FIRST),
IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
IB_OPCODE(RC, RDMA_WRITE_LAST),
IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
IB_OPCODE(RC, RDMA_WRITE_ONLY),
IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
IB_OPCODE(RC, RDMA_READ_REQUEST),
IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
IB_OPCODE(RC, ACKNOWLEDGE),
IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
IB_OPCODE(RC, COMPARE_SWAP),
IB_OPCODE(RC, FETCH_ADD),
IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),
IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),
/* UC */
IB_OPCODE(UC, SEND_FIRST),
IB_OPCODE(UC, SEND_MIDDLE),
IB_OPCODE(UC, SEND_LAST),
IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
IB_OPCODE(UC, SEND_ONLY),
IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
IB_OPCODE(UC, RDMA_WRITE_FIRST),
IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
IB_OPCODE(UC, RDMA_WRITE_LAST),
IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
IB_OPCODE(UC, RDMA_WRITE_ONLY),
IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
/* RD */
IB_OPCODE(RD, SEND_FIRST),
IB_OPCODE(RD, SEND_MIDDLE),
IB_OPCODE(RD, SEND_LAST),
IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
IB_OPCODE(RD, SEND_ONLY),
IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
IB_OPCODE(RD, RDMA_WRITE_FIRST),
IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
IB_OPCODE(RD, RDMA_WRITE_LAST),
IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
IB_OPCODE(RD, RDMA_WRITE_ONLY),
IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
IB_OPCODE(RD, RDMA_READ_REQUEST),
IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
IB_OPCODE(RD, ACKNOWLEDGE),
IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
IB_OPCODE(RD, COMPARE_SWAP),
IB_OPCODE(RD, FETCH_ADD),
/* UD */
IB_OPCODE(UD, SEND_ONLY),
IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
};
enum {
IB_LNH_RAW = 0,
IB_LNH_IP = 1,
IB_LNH_IBA_LOCAL = 2,
IB_LNH_IBA_GLOBAL = 3
};
struct ib_unpacked_lrh {
u8 virtual_lane;
u8 link_version;
u8 service_level;
u8 link_next_header;
__be16 destination_lid;
__be16 packet_length;
__be16 source_lid;
};
struct ib_unpacked_grh {
u8 ip_version;
u8 traffic_class;
__be32 flow_label;
__be16 payload_length;
u8 next_header;
u8 hop_limit;
union ib_gid source_gid;
union ib_gid destination_gid;
};
struct ib_unpacked_bth {
u8 opcode;
u8 solicited_event;
u8 mig_req;
u8 pad_count;
u8 transport_header_version;
__be16 pkey;
__be32 destination_qpn;
u8 ack_req;
__be32 psn;
};
struct ib_unpacked_deth {
__be32 qkey;
__be32 source_qpn;
};
struct ib_unpacked_eth {
u8 dmac_h[4];
u8 dmac_l[2];
u8 smac_h[2];
u8 smac_l[4];
__be16 type;
};
struct ib_unpacked_ip4 {
u8 ver;
u8 hdr_len;
u8 tos;
__be16 tot_len;
__be16 id;
__be16 frag_off;
u8 ttl;
u8 protocol;
__sum16 check;
__be32 saddr;
__be32 daddr;
};
struct ib_unpacked_udp {
__be16 sport;
__be16 dport;
__be16 length;
__be16 csum;
};
struct ib_unpacked_vlan {
__be16 tag;
__be16 type;
};
struct ib_ud_header {
int lrh_present;
struct ib_unpacked_lrh lrh;
int eth_present;
struct ib_unpacked_eth eth;
int vlan_present;
struct ib_unpacked_vlan vlan;
int grh_present;
struct ib_unpacked_grh grh;
int ipv4_present;
struct ib_unpacked_ip4 ip4;
int udp_present;
struct ib_unpacked_udp udp;
struct ib_unpacked_bth bth;
struct ib_unpacked_deth deth;
int immediate_present;
__be32 immediate_data;
};
void ib_pack(const struct ib_field *desc,
int desc_len,
void *structure,
void *buf);
void ib_unpack(const struct ib_field *desc,
int desc_len,
void *buf,
void *structure);
__sum16 ib_ud_ip4_csum(struct ib_ud_header *header);
int ib_ud_header_init(int payload_bytes,
int lrh_present,
int eth_present,
int vlan_present,
int grh_present,
int ip_version,
int udp_present,
int immediate_present,
struct ib_ud_header *header);
int ib_ud_header_pack(struct ib_ud_header *header,
void *buf);
int ib_ud_header_unpack(void *buf,
struct ib_ud_header *header);
#endif /* IB_PACK_H */
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