2014-12-31 23:19:16 +00:00
|
|
|
/*-
|
|
|
|
* Copyright (c) 2014 Chelsio Communications, Inc.
|
|
|
|
* All rights reserved.
|
|
|
|
* Written by: Navdeep Parhar <np@FreeBSD.org>
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
*
|
|
|
|
* $FreeBSD$
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef __CXGBE_MP_RING_H
|
|
|
|
#define __CXGBE_MP_RING_H
|
|
|
|
|
|
|
|
#ifndef _KERNEL
|
|
|
|
#error "no user-serviceable parts inside"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
struct mp_ring;
|
2020-07-03 04:44:23 +00:00
|
|
|
typedef u_int (*ring_drain_t)(struct mp_ring *, u_int, u_int, bool *);
|
2014-12-31 23:19:16 +00:00
|
|
|
typedef u_int (*ring_can_drain_t)(struct mp_ring *);
|
|
|
|
|
|
|
|
struct mp_ring {
|
|
|
|
volatile uint64_t state __aligned(CACHE_LINE_SIZE);
|
2020-07-03 04:44:23 +00:00
|
|
|
struct malloc_type * mt;
|
2014-12-31 23:19:16 +00:00
|
|
|
|
|
|
|
int size __aligned(CACHE_LINE_SIZE);
|
|
|
|
void * cookie;
|
|
|
|
ring_drain_t drain;
|
|
|
|
ring_can_drain_t can_drain; /* cheap, may be unreliable */
|
2020-07-03 04:44:23 +00:00
|
|
|
struct mtx * cons_lock;
|
|
|
|
counter_u64_t dropped;
|
|
|
|
counter_u64_t consumer[4];
|
|
|
|
counter_u64_t not_consumer;
|
2014-12-31 23:19:16 +00:00
|
|
|
counter_u64_t abdications;
|
2020-07-03 04:44:23 +00:00
|
|
|
counter_u64_t consumed;
|
|
|
|
counter_u64_t cons_idle;
|
|
|
|
counter_u64_t cons_idle2;
|
|
|
|
counter_u64_t stalls;
|
2014-12-31 23:19:16 +00:00
|
|
|
|
|
|
|
void * volatile items[] __aligned(CACHE_LINE_SIZE);
|
|
|
|
};
|
|
|
|
|
|
|
|
int mp_ring_alloc(struct mp_ring **, int, void *, ring_drain_t,
|
2020-07-03 04:44:23 +00:00
|
|
|
ring_can_drain_t, struct malloc_type *, struct mtx *, int);
|
2014-12-31 23:19:16 +00:00
|
|
|
void mp_ring_free(struct mp_ring *);
|
|
|
|
int mp_ring_enqueue(struct mp_ring *, void **, int, int);
|
|
|
|
void mp_ring_check_drainage(struct mp_ring *, int);
|
|
|
|
void mp_ring_reset_stats(struct mp_ring *);
|
2020-07-03 04:44:23 +00:00
|
|
|
bool mp_ring_is_idle(struct mp_ring *);
|
|
|
|
void mp_ring_sysctls(struct mp_ring *, struct sysctl_ctx_list *,
|
|
|
|
struct sysctl_oid_list *);
|
2014-12-31 23:19:16 +00:00
|
|
|
|
|
|
|
#endif
|