linux/drivers/infiniband/sw/rxe/rxe_queue.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 "rxe.h"
#include "rxe_loc.h"
#include "rxe_queue.h"

int do_mmap_info(struct rxe_dev *rxe, struct mminfo __user *outbuf,
		 struct ib_udata *udata, struct rxe_queue_buf *buf,
		 size_t buf_size, struct rxe_mmap_info **ip_p)
{ … }

inline void rxe_queue_reset(struct rxe_queue *q)
{ … }

struct rxe_queue *rxe_queue_init(struct rxe_dev *rxe, int *num_elem,
			unsigned int elem_size, enum queue_type type)
{ … }

/* copies elements from original q to new q and then swaps the contents of the
 * two q headers. This is so that if anyone is holding a pointer to q it will
 * still work
 */
static int resize_finish(struct rxe_queue *q, struct rxe_queue *new_q,
			 unsigned int num_elem)
{ … }

int rxe_queue_resize(struct rxe_queue *q, unsigned int *num_elem_p,
		     unsigned int elem_size, struct ib_udata *udata,
		     struct mminfo __user *outbuf, spinlock_t *producer_lock,
		     spinlock_t *consumer_lock)
{ … }

void rxe_queue_cleanup(struct rxe_queue *q)
{ … }