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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright(c) 2016 - 2018 Intel Corporation.
*/
#ifndef DEF_RDMAVT_INCCQ_H
#define DEF_RDMAVT_INCCQ_H
#include <linux/kthread.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_verbs.h>
/*
* Define an ib_cq_notify value that is not valid so we know when CQ
* notifications are armed.
*/
#define RVT_CQ_NONE (IB_CQ_NEXT_COMP + 1)
/*
* Define read macro that apply smp_load_acquire memory barrier
* when reading indice of circular buffer that mmaped to user space.
*/
#define RDMA_READ_UAPI_ATOMIC(member) smp_load_acquire(&(member).val)
/*
* Define write macro that uses smp_store_release memory barrier
* when writing indice of circular buffer that mmaped to user space.
*/
#define RDMA_WRITE_UAPI_ATOMIC(member, x) smp_store_release(&(member).val, x)
#include <rdma/rvt-abi.h>
/*
* 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_k_cq_wc {
u32 head; /* index of next entry to fill */
u32 tail; /* index of next ib_poll_cq() entry */
struct ib_wc kqueue[];
};
/*
* The completion queue structure.
*/
struct rvt_cq {
struct ib_cq ibcq;
struct work_struct comptask;
spinlock_t lock; /* protect changes in this struct */
u8 notify;
u8 triggered;
u8 cq_full;
int comp_vector_cpu;
struct rvt_dev_info *rdi;
struct rvt_cq_wc *queue;
struct rvt_mmap_info *ip;
struct rvt_k_cq_wc *kqueue;
};
static inline struct rvt_cq *ibcq_to_rvtcq(struct ib_cq *ibcq)
{
return container_of(ibcq, struct rvt_cq, ibcq);
}
bool rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited);
#endif /* DEF_RDMAVT_INCCQH */
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