/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */

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/*

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* This file contains defines, structures, etc. that are used

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* to communicate between kernel and user code.

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*/

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#ifndef RVT_ABI_USER_H

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#define RVT_ABI_USER_H

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#include <linux/types.h>

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#include <rdma/ib_user_verbs.h>

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#ifndef RDMA_ATOMIC_UAPI

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#define RDMA_ATOMIC_UAPI(_type, _name) struct{ _type val; } _name

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#endif

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struct rvt_wqe_sge {

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__aligned_u64 addr;

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__u32 length;

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__u32 lkey;

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};

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/*

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* This structure is used to contain the head pointer, tail pointer,

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* and completion queue entries as a single memory allocation so

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* it can be mmap'ed into user space.

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*/

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struct rvt_cq_wc {

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/* index of next entry to fill */

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RDMA_ATOMIC_UAPI(__u32, head);

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/* index of next ib_poll_cq() entry */

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RDMA_ATOMIC_UAPI(__u32, tail);

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/* these are actually size ibcq.cqe + 1 */

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struct ib_uverbs_wc uqueue[];

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};

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/*

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* Receive work request queue entry.

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* The size of the sg_list is determined when the QP (or SRQ) is created

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* and stored in qp->r_rq.max_sge (or srq->rq.max_sge).

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*/

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struct rvt_rwqe {

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__u64 wr_id;

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__u8 num_sge;

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__u8 padding[7];

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struct rvt_wqe_sge sg_list[];

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};

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/*

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* This structure is used to contain the head pointer, tail pointer,

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* and receive work queue entries as a single memory allocation so

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* it can be mmap'ed into user space.

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* Note that the wq array elements are variable size so you can't

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* just index into the array to get the N'th element;

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* use get_rwqe_ptr() for user space and rvt_get_rwqe_ptr()

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* for kernel space.

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*/

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struct rvt_rwq {

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/* new work requests posted to the head */

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RDMA_ATOMIC_UAPI(__u32, head);

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/* receives pull requests from here. */

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RDMA_ATOMIC_UAPI(__u32, tail);

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struct rvt_rwqe wq[];

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};

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#endif /* RVT_ABI_USER_H */

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