linux/drivers/infiniband/sw/rxe/rxe_mmap.c

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */

#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <rdma/uverbs_ioctl.h>

#include "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"

void rxe_mmap_release(struct kref *ref)
{ … }

/*
 * open and close keep track of how many times the memory region is mapped,
 * to avoid releasing it.
 */
static void rxe_vma_open(struct vm_area_struct *vma)
{ … }

static void rxe_vma_close(struct vm_area_struct *vma)
{ … }

static const struct vm_operations_struct rxe_vm_ops = …;

/**
 * rxe_mmap - create a new mmap region
 * @context: the IB user context of the process making the mmap() call
 * @vma: the VMA to be initialized
 * Return zero if the mmap is OK. Otherwise, return an errno.
 */
int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{ … }

/*
 * Allocate information for rxe_mmap
 */
struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *rxe, u32 size,
					   struct ib_udata *udata, void *obj)
{ … }