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66 lines
1.7 KiB
66 lines
1.7 KiB
/* 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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