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/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) or BSD-3-Clause */
/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
/* Copyright (c) 2008-2019, IBM Corporation */
#ifndef _SIW_USER_H
#define _SIW_USER_H
#include <linux/types.h>
#define SIW_NODE_DESC_COMMON "Software iWARP stack"
#define SIW_ABI_VERSION 1
#define SIW_MAX_SGE 6
#define SIW_UOBJ_MAX_KEY 0x08FFFF
#define SIW_INVAL_UOBJ_KEY (SIW_UOBJ_MAX_KEY + 1)
struct siw_uresp_create_cq {
__u32 cq_id;
__u32 num_cqe;
__aligned_u64 cq_key;
};
struct siw_uresp_create_qp {
__u32 qp_id;
__u32 num_sqe;
__u32 num_rqe;
__u32 pad;
__aligned_u64 sq_key;
__aligned_u64 rq_key;
};
struct siw_ureq_reg_mr {
__u8 stag_key;
__u8 reserved[3];
__u32 pad;
};
struct siw_uresp_reg_mr {
__u32 stag;
__u32 pad;
};
struct siw_uresp_create_srq {
__u32 num_rqe;
__u32 pad;
__aligned_u64 srq_key;
};
struct siw_uresp_alloc_ctx {
__u32 dev_id;
__u32 pad;
};
enum siw_opcode {
SIW_OP_WRITE,
SIW_OP_READ,
SIW_OP_READ_LOCAL_INV,
SIW_OP_SEND,
SIW_OP_SEND_WITH_IMM,
SIW_OP_SEND_REMOTE_INV,
/* Unsupported */
SIW_OP_FETCH_AND_ADD,
SIW_OP_COMP_AND_SWAP,
SIW_OP_RECEIVE,
/* provider internal SQE */
SIW_OP_READ_RESPONSE,
/*
* below opcodes valid for
* in-kernel clients only
*/
SIW_OP_INVAL_STAG,
SIW_OP_REG_MR,
SIW_NUM_OPCODES
};
/* Keep it same as ibv_sge to allow for memcpy */
struct siw_sge {
__aligned_u64 laddr;
__u32 length;
__u32 lkey;
};
/*
* Inline data are kept within the work request itself occupying
* the space of sge[1] .. sge[n]. Therefore, inline data cannot be
* supported if SIW_MAX_SGE is below 2 elements.
*/
#define SIW_MAX_INLINE (sizeof(struct siw_sge) * (SIW_MAX_SGE - 1))
#if SIW_MAX_SGE < 2
#error "SIW_MAX_SGE must be at least 2"
#endif
enum siw_wqe_flags {
SIW_WQE_VALID = 1,
SIW_WQE_INLINE = (1 << 1),
SIW_WQE_SIGNALLED = (1 << 2),
SIW_WQE_SOLICITED = (1 << 3),
SIW_WQE_READ_FENCE = (1 << 4),
SIW_WQE_REM_INVAL = (1 << 5),
SIW_WQE_COMPLETED = (1 << 6)
};
/* Send Queue Element */
struct siw_sqe {
__aligned_u64 id;
__u16 flags;
__u8 num_sge;
/* Contains enum siw_opcode values */
__u8 opcode;
__u32 rkey;
union {
__aligned_u64 raddr;
__aligned_u64 base_mr;
};
union {
struct siw_sge sge[SIW_MAX_SGE];
__aligned_u64 access;
};
};
/* Receive Queue Element */
struct siw_rqe {
__aligned_u64 id;
__u16 flags;
__u8 num_sge;
/*
* only used by kernel driver,
* ignored if set by user
*/
__u8 opcode;
__u32 unused;
struct siw_sge sge[SIW_MAX_SGE];
};
enum siw_notify_flags {
SIW_NOTIFY_NOT = (0),
SIW_NOTIFY_SOLICITED = (1 << 0),
SIW_NOTIFY_NEXT_COMPLETION = (1 << 1),
SIW_NOTIFY_MISSED_EVENTS = (1 << 2),
SIW_NOTIFY_ALL = SIW_NOTIFY_SOLICITED | SIW_NOTIFY_NEXT_COMPLETION |
SIW_NOTIFY_MISSED_EVENTS
};
enum siw_wc_status {
SIW_WC_SUCCESS,
SIW_WC_LOC_LEN_ERR,
SIW_WC_LOC_PROT_ERR,
SIW_WC_LOC_QP_OP_ERR,
SIW_WC_WR_FLUSH_ERR,
SIW_WC_BAD_RESP_ERR,
SIW_WC_LOC_ACCESS_ERR,
SIW_WC_REM_ACCESS_ERR,
SIW_WC_REM_INV_REQ_ERR,
SIW_WC_GENERAL_ERR,
SIW_NUM_WC_STATUS
};
struct siw_cqe {
__aligned_u64 id;
__u8 flags;
__u8 opcode;
__u16 status;
__u32 bytes;
union {
__aligned_u64 imm_data;
__u32 inval_stag;
};
/* QP number or QP pointer */
union {
struct ib_qp *base_qp;
__aligned_u64 qp_id;
};
};
/*
* Shared structure between user and kernel
* to control CQ arming.
*/
struct siw_cq_ctrl {
__aligned_u64 notify;
};
#endif
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