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/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
/*
* This file contains defines, structures, etc. that are used
* to communicate between kernel and user code.
*/
#ifndef RVT_ABI_USER_H
#define RVT_ABI_USER_H
#include <linux/types.h>
#include <rdma/ib_user_verbs.h>
#ifndef RDMA_ATOMIC_UAPI
#define RDMA_ATOMIC_UAPI(_type, _name) struct{ _type val; } _name
#endif
struct rvt_wqe_sge {
__aligned_u64 addr;
__u32 length;
__u32 lkey;
};
/*
* This structure is used to contain the head pointer, tail pointer,
* and completion queue entries as a single memory allocation so
* it can be mmap'ed into user space.
*/
struct rvt_cq_wc {
/* index of next entry to fill */
RDMA_ATOMIC_UAPI(__u32, head);
/* index of next ib_poll_cq() entry */
RDMA_ATOMIC_UAPI(__u32, tail);
/* these are actually size ibcq.cqe + 1 */
struct ib_uverbs_wc uqueue[];
};
/*
* Receive work request queue entry.
* The size of the sg_list is determined when the QP (or SRQ) is created
* and stored in qp->r_rq.max_sge (or srq->rq.max_sge).
*/
struct rvt_rwqe {
__u64 wr_id;
__u8 num_sge;
__u8 padding[7];
struct rvt_wqe_sge sg_list[];
};
/*
* This structure is used to contain the head pointer, tail pointer,
* and receive work queue entries as a single memory allocation so
* it can be mmap'ed into user space.
* Note that the wq array elements are variable size so you can't
* just index into the array to get the N'th element;
* use get_rwqe_ptr() for user space and rvt_get_rwqe_ptr()
* for kernel space.
*/
struct rvt_rwq {
/* new work requests posted to the head */
RDMA_ATOMIC_UAPI(__u32, head);
/* receives pull requests from here. */
RDMA_ATOMIC_UAPI(__u32, tail);
struct rvt_rwqe wq[];
};
#endif /* RVT_ABI_USER_H */
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