/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) 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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