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kernel/include/rdma/ib_pack.h

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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,
IB_OPCODE_FLUSH = 0x1C,
IB_OPCODE_ATOMIC_WRITE = 0x1D,
/* 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),
IB_OPCODE(RC, FLUSH),
IB_OPCODE(RC, ATOMIC_WRITE),
/* 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),
IB_OPCODE(RD, FLUSH),
/* 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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