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