1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
 4 */
 5
 6#include "queueing.h"
 7
 8struct multicore_worker __percpu *
 9wg_packet_percpu_multicore_worker_alloc(work_func_t function, void *ptr)
10{
11	int cpu;
12	struct multicore_worker __percpu *worker =
13		alloc_percpu(struct multicore_worker);
14
15	if (!worker)
16		return NULL;
17
18	for_each_possible_cpu(cpu) {
19		per_cpu_ptr(worker, cpu)->ptr = ptr;
20		INIT_WORK(&per_cpu_ptr(worker, cpu)->work, function);
21	}
22	return worker;
23}
24
25int wg_packet_queue_init(struct crypt_queue *queue, work_func_t function,
26			 bool multicore, unsigned int len)
27{
28	int ret;
29
30	memset(queue, 0, sizeof(*queue));
31	ret = ptr_ring_init(&queue->ring, len, GFP_KERNEL);
32	if (ret)
33		return ret;
34	if (function) {
35		if (multicore) {
36			queue->worker = wg_packet_percpu_multicore_worker_alloc(
37				function, queue);
38			if (!queue->worker) {
39				ptr_ring_cleanup(&queue->ring, NULL);
40				return -ENOMEM;
41			}
42		} else {
43			INIT_WORK(&queue->work, function);
44		}
45	}
46	return 0;
47}
48
49void wg_packet_queue_free(struct crypt_queue *queue, bool multicore)
50{
51	if (multicore)
52		free_percpu(queue->worker);
53	WARN_ON(!__ptr_ring_empty(&queue->ring));
54	ptr_ring_cleanup(&queue->ring, NULL);
55}