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1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */2 3/*4 * This file contains defines, structures, etc. that are used5 * to communicate between kernel and user code.6 */7 8#ifndef RVT_ABI_USER_H9#define RVT_ABI_USER_H10 11#include <linux/types.h>12#include <rdma/ib_user_verbs.h>13#ifndef RDMA_ATOMIC_UAPI14#define RDMA_ATOMIC_UAPI(_type, _name) struct{ _type val; } _name15#endif16 17struct rvt_wqe_sge {18 __aligned_u64 addr;19 __u32 length;20 __u32 lkey;21};22 23/*24 * This structure is used to contain the head pointer, tail pointer,25 * and completion queue entries as a single memory allocation so26 * it can be mmap'ed into user space.27 */28struct rvt_cq_wc {29 /* index of next entry to fill */30 RDMA_ATOMIC_UAPI(__u32, head);31 /* index of next ib_poll_cq() entry */32 RDMA_ATOMIC_UAPI(__u32, tail);33 34 /* these are actually size ibcq.cqe + 1 */35 struct ib_uverbs_wc uqueue[];36};37 38/*39 * Receive work request queue entry.40 * The size of the sg_list is determined when the QP (or SRQ) is created41 * and stored in qp->r_rq.max_sge (or srq->rq.max_sge).42 */43struct rvt_rwqe {44 __u64 wr_id;45 __u8 num_sge;46 __u8 padding[7];47 struct rvt_wqe_sge sg_list[];48};49 50/*51 * This structure is used to contain the head pointer, tail pointer,52 * and receive work queue entries as a single memory allocation so53 * it can be mmap'ed into user space.54 * Note that the wq array elements are variable size so you can't55 * just index into the array to get the N'th element;56 * use get_rwqe_ptr() for user space and rvt_get_rwqe_ptr()57 * for kernel space.58 */59struct rvt_rwq {60 /* new work requests posted to the head */61 RDMA_ATOMIC_UAPI(__u32, head);62 /* receives pull requests from here. */63 RDMA_ATOMIC_UAPI(__u32, tail);64 struct rvt_rwqe wq[];65};66#endif /* RVT_ABI_USER_H */67