66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) 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 */
|