| /* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */ |
| |
| /* Authors: Bernard Metzler <bmt@zurich.ibm.com> */ |
| /* Copyright (c) 2008-2019, IBM Corporation */ |
| |
| #ifndef _IWARP_H |
| #define _IWARP_H |
| |
| #include <rdma/rdma_user_cm.h> /* RDMA_MAX_PRIVATE_DATA */ |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| |
| #define RDMAP_VERSION 1 |
| #define DDP_VERSION 1 |
| #define MPA_REVISION_1 1 |
| #define MPA_REVISION_2 2 |
| #define MPA_MAX_PRIVDATA RDMA_MAX_PRIVATE_DATA |
| #define MPA_KEY_REQ "MPA ID Req Frame" |
| #define MPA_KEY_REP "MPA ID Rep Frame" |
| #define MPA_IRD_ORD_MASK 0x3fff |
| |
| struct mpa_rr_params { |
| __be16 bits; |
| __be16 pd_len; |
| }; |
| |
| /* |
| * MPA request/response header bits & fields |
| */ |
| enum { |
| MPA_RR_FLAG_MARKERS = cpu_to_be16(0x8000), |
| MPA_RR_FLAG_CRC = cpu_to_be16(0x4000), |
| MPA_RR_FLAG_REJECT = cpu_to_be16(0x2000), |
| MPA_RR_FLAG_ENHANCED = cpu_to_be16(0x1000), |
| MPA_RR_FLAG_GSO_EXP = cpu_to_be16(0x0800), |
| MPA_RR_MASK_REVISION = cpu_to_be16(0x00ff) |
| }; |
| |
| /* |
| * MPA request/reply header |
| */ |
| struct mpa_rr { |
| __u8 key[16]; |
| struct mpa_rr_params params; |
| }; |
| |
| static inline void __mpa_rr_set_revision(__be16 *bits, u8 rev) |
| { |
| *bits = (*bits & ~MPA_RR_MASK_REVISION) | |
| (cpu_to_be16(rev) & MPA_RR_MASK_REVISION); |
| } |
| |
| static inline u8 __mpa_rr_revision(__be16 mpa_rr_bits) |
| { |
| __be16 rev = mpa_rr_bits & MPA_RR_MASK_REVISION; |
| |
| return be16_to_cpu(rev); |
| } |
| |
| enum mpa_v2_ctrl { |
| MPA_V2_PEER_TO_PEER = cpu_to_be16(0x8000), |
| MPA_V2_ZERO_LENGTH_RTR = cpu_to_be16(0x4000), |
| MPA_V2_RDMA_WRITE_RTR = cpu_to_be16(0x8000), |
| MPA_V2_RDMA_READ_RTR = cpu_to_be16(0x4000), |
| MPA_V2_RDMA_NO_RTR = cpu_to_be16(0x0000), |
| MPA_V2_MASK_IRD_ORD = cpu_to_be16(0x3fff) |
| }; |
| |
| struct mpa_v2_data { |
| __be16 ird; |
| __be16 ord; |
| }; |
| |
| struct mpa_marker { |
| __be16 rsvd; |
| __be16 fpdu_hmd; /* FPDU header-marker distance (= MPA's FPDUPTR) */ |
| }; |
| |
| /* |
| * maximum MPA trailer |
| */ |
| struct mpa_trailer { |
| __u8 pad[4]; |
| __be32 crc; |
| }; |
| |
| #define MPA_HDR_SIZE 2 |
| #define MPA_CRC_SIZE 4 |
| |
| /* |
| * Common portion of iWARP headers (MPA, DDP, RDMAP) |
| * for any FPDU |
| */ |
| struct iwarp_ctrl { |
| __be16 mpa_len; |
| __be16 ddp_rdmap_ctrl; |
| }; |
| |
| /* |
| * DDP/RDMAP Hdr bits & fields |
| */ |
| enum { |
| DDP_FLAG_TAGGED = cpu_to_be16(0x8000), |
| DDP_FLAG_LAST = cpu_to_be16(0x4000), |
| DDP_MASK_RESERVED = cpu_to_be16(0x3C00), |
| DDP_MASK_VERSION = cpu_to_be16(0x0300), |
| RDMAP_MASK_VERSION = cpu_to_be16(0x00C0), |
| RDMAP_MASK_RESERVED = cpu_to_be16(0x0030), |
| RDMAP_MASK_OPCODE = cpu_to_be16(0x000f) |
| }; |
| |
| static inline u8 __ddp_get_version(struct iwarp_ctrl *ctrl) |
| { |
| return be16_to_cpu(ctrl->ddp_rdmap_ctrl & DDP_MASK_VERSION) >> 8; |
| } |
| |
| static inline u8 __rdmap_get_version(struct iwarp_ctrl *ctrl) |
| { |
| __be16 ver = ctrl->ddp_rdmap_ctrl & RDMAP_MASK_VERSION; |
| |
| return be16_to_cpu(ver) >> 6; |
| } |
| |
| static inline u8 __rdmap_get_opcode(struct iwarp_ctrl *ctrl) |
| { |
| return be16_to_cpu(ctrl->ddp_rdmap_ctrl & RDMAP_MASK_OPCODE); |
| } |
| |
| static inline void __rdmap_set_opcode(struct iwarp_ctrl *ctrl, u8 opcode) |
| { |
| ctrl->ddp_rdmap_ctrl = (ctrl->ddp_rdmap_ctrl & ~RDMAP_MASK_OPCODE) | |
| (cpu_to_be16(opcode) & RDMAP_MASK_OPCODE); |
| } |
| |
| struct iwarp_rdma_write { |
| struct iwarp_ctrl ctrl; |
| __be32 sink_stag; |
| __be64 sink_to; |
| }; |
| |
| struct iwarp_rdma_rreq { |
| struct iwarp_ctrl ctrl; |
| __be32 rsvd; |
| __be32 ddp_qn; |
| __be32 ddp_msn; |
| __be32 ddp_mo; |
| __be32 sink_stag; |
| __be64 sink_to; |
| __be32 read_size; |
| __be32 source_stag; |
| __be64 source_to; |
| }; |
| |
| struct iwarp_rdma_rresp { |
| struct iwarp_ctrl ctrl; |
| __be32 sink_stag; |
| __be64 sink_to; |
| }; |
| |
| struct iwarp_send { |
| struct iwarp_ctrl ctrl; |
| __be32 rsvd; |
| __be32 ddp_qn; |
| __be32 ddp_msn; |
| __be32 ddp_mo; |
| }; |
| |
| struct iwarp_send_inv { |
| struct iwarp_ctrl ctrl; |
| __be32 inval_stag; |
| __be32 ddp_qn; |
| __be32 ddp_msn; |
| __be32 ddp_mo; |
| }; |
| |
| struct iwarp_terminate { |
| struct iwarp_ctrl ctrl; |
| __be32 rsvd; |
| __be32 ddp_qn; |
| __be32 ddp_msn; |
| __be32 ddp_mo; |
| #if defined(__LITTLE_ENDIAN_BITFIELD) |
| __be32 layer : 4; |
| __be32 etype : 4; |
| __be32 ecode : 8; |
| __be32 flag_m : 1; |
| __be32 flag_d : 1; |
| __be32 flag_r : 1; |
| __be32 reserved : 13; |
| #elif defined(__BIG_ENDIAN_BITFIELD) |
| __be32 reserved : 13; |
| __be32 flag_r : 1; |
| __be32 flag_d : 1; |
| __be32 flag_m : 1; |
| __be32 ecode : 8; |
| __be32 etype : 4; |
| __be32 layer : 4; |
| #else |
| #error "undefined byte order" |
| #endif |
| }; |
| |
| /* |
| * Terminate Hdr bits & fields |
| */ |
| enum { |
| TERM_MASK_LAYER = cpu_to_be32(0xf0000000), |
| TERM_MASK_ETYPE = cpu_to_be32(0x0f000000), |
| TERM_MASK_ECODE = cpu_to_be32(0x00ff0000), |
| TERM_FLAG_M = cpu_to_be32(0x00008000), |
| TERM_FLAG_D = cpu_to_be32(0x00004000), |
| TERM_FLAG_R = cpu_to_be32(0x00002000), |
| TERM_MASK_RESVD = cpu_to_be32(0x00001fff) |
| }; |
| |
| static inline u8 __rdmap_term_layer(struct iwarp_terminate *term) |
| { |
| return term->layer; |
| } |
| |
| static inline void __rdmap_term_set_layer(struct iwarp_terminate *term, |
| u8 layer) |
| { |
| term->layer = layer & 0xf; |
| } |
| |
| static inline u8 __rdmap_term_etype(struct iwarp_terminate *term) |
| { |
| return term->etype; |
| } |
| |
| static inline void __rdmap_term_set_etype(struct iwarp_terminate *term, |
| u8 etype) |
| { |
| term->etype = etype & 0xf; |
| } |
| |
| static inline u8 __rdmap_term_ecode(struct iwarp_terminate *term) |
| { |
| return term->ecode; |
| } |
| |
| static inline void __rdmap_term_set_ecode(struct iwarp_terminate *term, |
| u8 ecode) |
| { |
| term->ecode = ecode; |
| } |
| |
| /* |
| * Common portion of iWARP headers (MPA, DDP, RDMAP) |
| * for an FPDU carrying an untagged DDP segment |
| */ |
| struct iwarp_ctrl_untagged { |
| struct iwarp_ctrl ctrl; |
| __be32 rsvd; |
| __be32 ddp_qn; |
| __be32 ddp_msn; |
| __be32 ddp_mo; |
| }; |
| |
| /* |
| * Common portion of iWARP headers (MPA, DDP, RDMAP) |
| * for an FPDU carrying a tagged DDP segment |
| */ |
| struct iwarp_ctrl_tagged { |
| struct iwarp_ctrl ctrl; |
| __be32 ddp_stag; |
| __be64 ddp_to; |
| }; |
| |
| union iwarp_hdr { |
| struct iwarp_ctrl ctrl; |
| struct iwarp_ctrl_untagged c_untagged; |
| struct iwarp_ctrl_tagged c_tagged; |
| struct iwarp_rdma_write rwrite; |
| struct iwarp_rdma_rreq rreq; |
| struct iwarp_rdma_rresp rresp; |
| struct iwarp_terminate terminate; |
| struct iwarp_send send; |
| struct iwarp_send_inv send_inv; |
| }; |
| |
| enum term_elayer { |
| TERM_ERROR_LAYER_RDMAP = 0x00, |
| TERM_ERROR_LAYER_DDP = 0x01, |
| TERM_ERROR_LAYER_LLP = 0x02 /* eg., MPA */ |
| }; |
| |
| enum ddp_etype { |
| DDP_ETYPE_CATASTROPHIC = 0x0, |
| DDP_ETYPE_TAGGED_BUF = 0x1, |
| DDP_ETYPE_UNTAGGED_BUF = 0x2, |
| DDP_ETYPE_RSVD = 0x3 |
| }; |
| |
| enum ddp_ecode { |
| /* unspecified, set to zero */ |
| DDP_ECODE_CATASTROPHIC = 0x00, |
| /* Tagged Buffer Errors */ |
| DDP_ECODE_T_INVALID_STAG = 0x00, |
| DDP_ECODE_T_BASE_BOUNDS = 0x01, |
| DDP_ECODE_T_STAG_NOT_ASSOC = 0x02, |
| DDP_ECODE_T_TO_WRAP = 0x03, |
| DDP_ECODE_T_VERSION = 0x04, |
| /* Untagged Buffer Errors */ |
| DDP_ECODE_UT_INVALID_QN = 0x01, |
| DDP_ECODE_UT_INVALID_MSN_NOBUF = 0x02, |
| DDP_ECODE_UT_INVALID_MSN_RANGE = 0x03, |
| DDP_ECODE_UT_INVALID_MO = 0x04, |
| DDP_ECODE_UT_MSG_TOOLONG = 0x05, |
| DDP_ECODE_UT_VERSION = 0x06 |
| }; |
| |
| enum rdmap_untagged_qn { |
| RDMAP_UNTAGGED_QN_SEND = 0, |
| RDMAP_UNTAGGED_QN_RDMA_READ = 1, |
| RDMAP_UNTAGGED_QN_TERMINATE = 2, |
| RDMAP_UNTAGGED_QN_COUNT = 3 |
| }; |
| |
| enum rdmap_etype { |
| RDMAP_ETYPE_CATASTROPHIC = 0x0, |
| RDMAP_ETYPE_REMOTE_PROTECTION = 0x1, |
| RDMAP_ETYPE_REMOTE_OPERATION = 0x2 |
| }; |
| |
| enum rdmap_ecode { |
| RDMAP_ECODE_INVALID_STAG = 0x00, |
| RDMAP_ECODE_BASE_BOUNDS = 0x01, |
| RDMAP_ECODE_ACCESS_RIGHTS = 0x02, |
| RDMAP_ECODE_STAG_NOT_ASSOC = 0x03, |
| RDMAP_ECODE_TO_WRAP = 0x04, |
| RDMAP_ECODE_VERSION = 0x05, |
| RDMAP_ECODE_OPCODE = 0x06, |
| RDMAP_ECODE_CATASTROPHIC_STREAM = 0x07, |
| RDMAP_ECODE_CATASTROPHIC_GLOBAL = 0x08, |
| RDMAP_ECODE_CANNOT_INVALIDATE = 0x09, |
| RDMAP_ECODE_UNSPECIFIED = 0xff |
| }; |
| |
| enum llp_ecode { |
| LLP_ECODE_TCP_STREAM_LOST = 0x01, /* How to transfer this ?? */ |
| LLP_ECODE_RECEIVED_CRC = 0x02, |
| LLP_ECODE_FPDU_START = 0x03, |
| LLP_ECODE_INVALID_REQ_RESP = 0x04, |
| |
| /* Errors for Enhanced Connection Establishment only */ |
| LLP_ECODE_LOCAL_CATASTROPHIC = 0x05, |
| LLP_ECODE_INSUFFICIENT_IRD = 0x06, |
| LLP_ECODE_NO_MATCHING_RTR = 0x07 |
| }; |
| |
| enum llp_etype { LLP_ETYPE_MPA = 0x00 }; |
| |
| enum rdma_opcode { |
| RDMAP_RDMA_WRITE = 0x0, |
| RDMAP_RDMA_READ_REQ = 0x1, |
| RDMAP_RDMA_READ_RESP = 0x2, |
| RDMAP_SEND = 0x3, |
| RDMAP_SEND_INVAL = 0x4, |
| RDMAP_SEND_SE = 0x5, |
| RDMAP_SEND_SE_INVAL = 0x6, |
| RDMAP_TERMINATE = 0x7, |
| RDMAP_NOT_SUPPORTED = RDMAP_TERMINATE + 1 |
| }; |
| |
| #endif |