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/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#include "queueing.h"
struct multicore_worker __percpu *packet_alloc_percpu_multicore_worker(work_func_t function, void *ptr)
{
int cpu;
struct multicore_worker __percpu *worker = alloc_percpu(struct multicore_worker);
if (!worker)
return NULL;
for_each_possible_cpu(cpu) {
per_cpu_ptr(worker, cpu)->ptr = ptr;
INIT_WORK(&per_cpu_ptr(worker, cpu)->work, function);
}
return worker;
}
int packet_queue_init(struct crypt_queue *queue, work_func_t function, bool multicore, unsigned int len)
{
/*int ret;*/
memset(queue, 0, sizeof(*queue));
/*ret = ptr_ring_init(&queue->ring, len, GFP_KERNEL);*/
/*if (ret)*/
/*return ret;*/
ck_ring_init(&queue->ring, len);
if (multicore) {
queue->worker = packet_alloc_percpu_multicore_worker(function, queue);
if (!queue->worker)
return -ENOMEM;
} else
INIT_WORK(&queue->work, function);
return 0;
}
void packet_queue_free(struct crypt_queue *queue, bool multicore)
{
if (multicore)
free_percpu(queue->worker);
/* TODO: from the ck docs: It is possible for the function to return
* false even if ring is non-empty. See also
* http://concurrencykit.org/doc/ck_ring_trydequeue_spmc.html */
/*WARN_ON(!ptr_ring_empty_bh(&queue->ring));*/
/*ptr_ring_cleanup(&queue->ring, NULL);*/
}
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