rvt-abi.h (1771B)
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 used 5 * to communicate between kernel and user code. 6 */ 7 8#ifndef RVT_ABI_USER_H 9#define RVT_ABI_USER_H 10 11#include <linux/types.h> 12#include <rdma/ib_user_verbs.h> 13#ifndef RDMA_ATOMIC_UAPI 14#define RDMA_ATOMIC_UAPI(_type, _name) struct{ _type val; } _name 15#endif 16 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 so 26 * 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 created 41 * 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 so 53 * it can be mmap'ed into user space. 54 * Note that the wq array elements are variable size so you can't 55 * 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 */