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Diffstat (limited to 'include/uapi/rdma/rvt-abi.h')
-rw-r--r-- | include/uapi/rdma/rvt-abi.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/uapi/rdma/rvt-abi.h b/include/uapi/rdma/rvt-abi.h new file mode 100644 index 0000000000..7c05a02d2b --- /dev/null +++ b/include/uapi/rdma/rvt-abi.h @@ -0,0 +1,66 @@ +/* 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 */ |