projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| a046d57d UB |
2 | /* |
| 3 | * Shared Memory Communications over RDMA (SMC-R) and RoCE | |
| 4 | * | |
| 5 | * CLC (connection layer control) handshake over initial TCP socket to | |
| 6 | * prepare for RDMA traffic | |
| 7 | * | |
| 8 | * Copyright IBM Corp. 2016 | |
| 9 | * | |
| 10 | * Author(s): Ursula Braun <[email protected]> | |
| 11 | */ | |
| 12 | ||
| 13 | #ifndef _SMC_CLC_H | |
| 14 | #define _SMC_CLC_H | |
| 15 | ||
| 16 | #include <rdma/ib_verbs.h> | |
| 17 | ||
| 18 | #include "smc.h" | |
| 19 | ||
| 20 | #define SMC_CLC_PROPOSAL 0x01 | |
| 21 | #define SMC_CLC_ACCEPT 0x02 | |
| 22 | #define SMC_CLC_CONFIRM 0x03 | |
| 23 | #define SMC_CLC_DECLINE 0x04 | |
| 24 | ||
| 25 | /* eye catcher "SMCR" EBCDIC for CLC messages */ | |
| 26 | static const char SMC_EYECATCHER[4] = {'\xe2', '\xd4', '\xc3', '\xd9'}; | |
| 27 | ||
| 28 | #define SMC_CLC_V1 0x1 /* SMC version */ | |
| 29 | #define CLC_WAIT_TIME (6 * HZ) /* max. wait time on clcsock */ | |
| 30 | #define SMC_CLC_DECL_MEM 0x01010000 /* insufficient memory resources */ | |
| 31 | #define SMC_CLC_DECL_TIMEOUT 0x02000000 /* timeout */ | |
| 32 | #define SMC_CLC_DECL_CNFERR 0x03000000 /* configuration error */ | |
| 33 | #define SMC_CLC_DECL_IPSEC 0x03030000 /* IPsec usage */ | |
| 34 | #define SMC_CLC_DECL_SYNCERR 0x04000000 /* synchronization error */ | |
| 35 | #define SMC_CLC_DECL_REPLY 0x06000000 /* reply to a received decline */ | |
| 36 | #define SMC_CLC_DECL_INTERR 0x99990000 /* internal error */ | |
| 9bf9abea UB |
37 | #define SMC_CLC_DECL_TCL 0x02040000 /* timeout w4 QP confirm */ |
| 38 | #define SMC_CLC_DECL_SEND 0x07000000 /* sending problem */ | |
| a046d57d UB |
39 | |
| 40 | struct smc_clc_msg_hdr { /* header1 of clc messages */ | |
| 41 | u8 eyecatcher[4]; /* eye catcher */ | |
| 42 | u8 type; /* proposal / accept / confirm / decline */ | |
| 43 | __be16 length; | |
| 44 | #if defined(__BIG_ENDIAN_BITFIELD) | |
| 45 | u8 version : 4, | |
| 46 | flag : 1, | |
| 47 | rsvd : 3; | |
| 48 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
| 49 | u8 rsvd : 3, | |
| 50 | flag : 1, | |
| 51 | version : 4; | |
| 52 | #endif | |
| 53 | } __packed; /* format defined in RFC7609 */ | |
| 54 | ||
| 55 | struct smc_clc_msg_trail { /* trailer of clc messages */ | |
| 56 | u8 eyecatcher[4]; | |
| 57 | }; | |
| 58 | ||
| 59 | struct smc_clc_msg_local { /* header2 of clc messages */ | |
| 60 | u8 id_for_peer[SMC_SYSTEMID_LEN]; /* unique system id */ | |
| 61 | u8 gid[16]; /* gid of ib_device port */ | |
| 62 | u8 mac[6]; /* mac of ib_device port */ | |
| 63 | }; | |
| 64 | ||
| 65 | struct smc_clc_msg_proposal { /* clc proposal message */ | |
| 66 | struct smc_clc_msg_hdr hdr; | |
| 67 | struct smc_clc_msg_local lcl; | |
| 68 | __be16 iparea_offset; /* offset to IP address information area */ | |
| 69 | __be32 outgoing_subnet; /* subnet mask */ | |
| 70 | u8 prefix_len; /* number of significant bits in mask */ | |
| 71 | u8 reserved[2]; | |
| 72 | u8 ipv6_prefixes_cnt; /* number of IPv6 prefixes in prefix array */ | |
| 73 | struct smc_clc_msg_trail trl; /* eye catcher "SMCR" EBCDIC */ | |
| 74 | } __aligned(4); | |
| 75 | ||
| 76 | struct smc_clc_msg_accept_confirm { /* clc accept / confirm message */ | |
| 77 | struct smc_clc_msg_hdr hdr; | |
| 78 | struct smc_clc_msg_local lcl; | |
| 79 | u8 qpn[3]; /* QP number */ | |
| 80 | __be32 rmb_rkey; /* RMB rkey */ | |
| 81 | u8 conn_idx; /* Connection index, which RMBE in RMB */ | |
| 82 | __be32 rmbe_alert_token;/* unique connection id */ | |
| 83 | #if defined(__BIG_ENDIAN_BITFIELD) | |
| 84 | u8 rmbe_size : 4, /* RMBE buf size (compressed notation) */ | |
| 85 | qp_mtu : 4; /* QP mtu */ | |
| 86 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
| 87 | u8 qp_mtu : 4, | |
| 88 | rmbe_size : 4; | |
| 89 | #endif | |
| 90 | u8 reserved; | |
| 91 | __be64 rmb_dma_addr; /* RMB virtual address */ | |
| 92 | u8 reserved2; | |
| 93 | u8 psn[3]; /* initial packet sequence number */ | |
| 94 | struct smc_clc_msg_trail trl; /* eye catcher "SMCR" EBCDIC */ | |
| 95 | } __packed; /* format defined in RFC7609 */ | |
| 96 | ||
| 97 | struct smc_clc_msg_decline { /* clc decline message */ | |
| 98 | struct smc_clc_msg_hdr hdr; | |
| 99 | u8 id_for_peer[SMC_SYSTEMID_LEN]; /* sender peer_id */ | |
| 100 | __be32 peer_diagnosis; /* diagnosis information */ | |
| 101 | u8 reserved2[4]; | |
| 102 | struct smc_clc_msg_trail trl; /* eye catcher "SMCR" EBCDIC */ | |
| 103 | } __aligned(4); | |
| 104 | ||
| 105 | struct smc_sock; | |
| 106 | struct smc_ib_device; | |
| 107 | ||
| 108 | int smc_clc_wait_msg(struct smc_sock *smc, void *buf, int buflen, | |
| 109 | u8 expected_type); | |
| bfbedfd3 | 110 | int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info); |
| a046d57d UB |
111 | int smc_clc_send_proposal(struct smc_sock *smc, struct smc_ib_device *smcibdev, |
| 112 | u8 ibport); | |
| 113 | int smc_clc_send_confirm(struct smc_sock *smc); | |
| 0cfdd8f9 | 114 | int smc_clc_send_accept(struct smc_sock *smc, int srv_first_contact); |
| a046d57d UB |
115 | |
| 116 | #endif |