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/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */

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/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */

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#ifndef _SIW_USER_H

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#define _SIW_USER_H

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#include <linux/types.h>

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#define SIW_NODE_DESC_COMMON "Software iWARP stack"

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#define SIW_ABI_VERSION 1

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#define SIW_MAX_SGE 6

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#define SIW_UOBJ_MAX_KEY 0x08FFFF

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#define SIW_INVAL_UOBJ_KEY (SIW_UOBJ_MAX_KEY + 1)

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struct siw_uresp_create_cq {

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__u32 cq_id;

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__u32 num_cqe;

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__aligned_u64 cq_key;

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};

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struct siw_uresp_create_qp {

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__u32 qp_id;

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__u32 num_sqe;

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__u32 num_rqe;

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__u32 pad;

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__aligned_u64 sq_key;

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__aligned_u64 rq_key;

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};

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struct siw_ureq_reg_mr {

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__u8 stag_key;

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__u8 reserved[3];

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__u32 pad;

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};

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struct siw_uresp_reg_mr {

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__u32 stag;

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__u32 pad;

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};

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struct siw_uresp_create_srq {

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__u32 num_rqe;

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__u32 pad;

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__aligned_u64 srq_key;

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};

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struct siw_uresp_alloc_ctx {

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__u32 dev_id;

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__u32 pad;

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};

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enum siw_opcode {

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SIW_OP_WRITE,

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SIW_OP_READ,

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SIW_OP_READ_LOCAL_INV,

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SIW_OP_SEND,

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SIW_OP_SEND_WITH_IMM,

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SIW_OP_SEND_REMOTE_INV,

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/* Unsupported */

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SIW_OP_FETCH_AND_ADD,

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SIW_OP_COMP_AND_SWAP,

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SIW_OP_RECEIVE,

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/* provider internal SQE */

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SIW_OP_READ_RESPONSE,

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* below opcodes valid for

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* in-kernel clients only

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SIW_OP_INVAL_STAG,

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SIW_OP_REG_MR,

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SIW_NUM_OPCODES

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};

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/* Keep it same as ibv_sge to allow for memcpy */

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struct siw_sge {

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__aligned_u64 laddr;

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__u32 length;

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__u32 lkey;

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};

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* Inline data are kept within the work request itself occupying

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* the space of sge[1] .. sge[n]. Therefore, __inline__ data cannot be

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* supported if SIW_MAX_SGE is below 2 elements.

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#define SIW_MAX_INLINE (sizeof(struct siw_sge) * (SIW_MAX_SGE - 1))

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#if SIW_MAX_SGE < 2

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#error "SIW_MAX_SGE must be at least 2"

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#endif

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enum siw_wqe_flags {

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SIW_WQE_VALID = 1,

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SIW_WQE_INLINE = (1 << 1),

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SIW_WQE_SIGNALLED = (1 << 2),

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SIW_WQE_SOLICITED = (1 << 3),

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SIW_WQE_READ_FENCE = (1 << 4),

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SIW_WQE_REM_INVAL = (1 << 5),

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SIW_WQE_COMPLETED = (1 << 6)

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};

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/* Send Queue Element */

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struct siw_sqe {

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__aligned_u64 id;

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__u16 flags;

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__u8 num_sge;

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/* Contains enum siw_opcode values */

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__u8 opcode;

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__u32 rkey;

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union {

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__aligned_u64 raddr;

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__aligned_u64 base_mr;

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};

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union {

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struct siw_sge sge[SIW_MAX_SGE];

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__aligned_u64 access;

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};

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};

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/* Receive Queue Element */

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struct siw_rqe {

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__aligned_u64 id;

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__u16 flags;

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__u8 num_sge;

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* only used by kernel driver,

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* ignored if set by user

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__u8 opcode;

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__u32 unused;

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struct siw_sge sge[SIW_MAX_SGE];

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};

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enum siw_notify_flags {

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SIW_NOTIFY_NOT = (0),

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SIW_NOTIFY_SOLICITED = (1 << 0),

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SIW_NOTIFY_NEXT_COMPLETION = (1 << 1),

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SIW_NOTIFY_MISSED_EVENTS = (1 << 2),

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SIW_NOTIFY_ALL = SIW_NOTIFY_SOLICITED | SIW_NOTIFY_NEXT_COMPLETION |

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SIW_NOTIFY_MISSED_EVENTS

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};

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enum siw_wc_status {

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SIW_WC_SUCCESS,

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SIW_WC_LOC_LEN_ERR,

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SIW_WC_LOC_PROT_ERR,

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SIW_WC_LOC_QP_OP_ERR,

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SIW_WC_WR_FLUSH_ERR,

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SIW_WC_BAD_RESP_ERR,

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SIW_WC_LOC_ACCESS_ERR,

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SIW_WC_REM_ACCESS_ERR,

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SIW_WC_REM_INV_REQ_ERR,

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SIW_WC_GENERAL_ERR,

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SIW_NUM_WC_STATUS

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};

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struct siw_cqe {

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__aligned_u64 id;

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__u8 flags;

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__u8 opcode;

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__u16 status;

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__u32 bytes;

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union {

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__aligned_u64 imm_data;

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__u32 inval_stag;

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};

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/* QP number or QP pointer */

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union {

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struct ib_qp *base_qp;

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__aligned_u64 qp_id;

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};

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};

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* Shared structure between user and kernel

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* to control CQ arming.

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struct siw_cq_ctrl {

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__u32 flags;

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__u32 pad;

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};

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#endif

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