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/*
* Copyright (c) 2006-2012. QLogic Corporation. All rights reserved.
* Copyright (c) 2003-2006, PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - 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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _PSMI_IN_USER_H
#error psm_timer.h not meant to be included directly, include psm_user.h instead
#endif
#ifndef _PSMI_TIMER_H
#define _PSMI_TIMER_H
#include "psm_user.h"
/* Keep timer stats */
#define PSMI_TIMER_STATS 0
typedef struct psmi_timer psmi_timer;
typedef psm_error_t (*psmi_timer_expire_callback_t)(struct psmi_timer *, uint64_t);
struct psmi_timer {
TAILQ_ENTRY(psmi_timer) timer; /* opaque */
uint64_t t_timeout; /* opaque */
uint8_t flags; /* opaque */
psmi_timer_expire_callback_t expire_callback; /* user -- callback fn */
void *context; /* user -- callback param */
};
struct psmi_timer_ctrl {
uint64_t t_cyc_next_expire;
TAILQ_HEAD(timerq, psmi_timer) timerq;
#if PSMI_TIMER_STATS
uint64_t num_insertions;
uint64_t num_traversals;
#endif
};
/*
* Some events need to be unconditionally enqueued at the beginning of the
* timerq -- they are not timers meant to expire but merely operations that
* need to be delayed. For delayed operations, there are 5 levels of
* priority.
*/
#define PSMI_TIMER_PRIO_0 0ULL
#define PSMI_TIMER_PRIO_1 1ULL
#define PSMI_TIMER_PRIO_2 2ULL
#define PSMI_TIMER_PRIO_3 3ULL
#define PSMI_TIMER_PRIO_4 4ULL
#define PSMI_TIMER_PRIO_LAST PSMI_TIMER_PRIO_4
#define PSMI_TIMER_INFINITE 0xFFFFFFFFFFFFFFFFULL
#define PSMI_TIMER_FLAG_PENDING 0x01
/*
* Timer control initialization and finalization
*/
psm_error_t psmi_timer_init(struct psmi_timer_ctrl *ctrl);
psm_error_t psmi_timer_fini(struct psmi_timer_ctrl *ctrl);
/*
* Timer entry initialization (a timer must be initialized before it can be
* added to the timer request queue).
*/
void psmi_timer_entry_init(struct psmi_timer *t_init,
psmi_timer_expire_callback_t expire_fn,
void *context);
/*
* Timer requests, conditional (macro) or unconditional
*/
#define psmi_timer_request(ctrl, t_insert, t_cyc) \
if (!((t_insert)->flags & PSMI_TIMER_FLAG_PENDING)) \
psmi_timer_request_always((ctrl), (t_insert), (t_cyc))
void psmi_timer_request_always(struct psmi_timer_ctrl *ctrl,
struct psmi_timer *t_insert,
uint64_t t_cyc_expire);
/*
* Timer cancelations, conditional (macro) only (cancel_inner is internal)
*/
#define psmi_timer_cancel(ctrl, t_remove) \
if ((t_remove)->flags & PSMI_TIMER_FLAG_PENDING) \
psmi_timer_cancel_inner(ctrl, t_remove)
void psmi_timer_cancel_inner(struct psmi_timer_ctrl *ctrl,
struct psmi_timer *t_remove);
/*
* Timer processing, conditional or unconditional.
*/
#define psmi_timer_process_if_expired(ctrl, t_cyc_expire) \
(((ctrl)->t_cyc_next_expire <= (t_cyc_expire)) ? \
psmi_timer_process_expired(ctrl, t_cyc_expire) : \
PSM_OK_NO_PROGRESS)
#define psmi_timer_is_expired(ctrl, t_cyc_expire) \
((ctrl)->t_cyc_next_expire <= (t_cyc_expire))
psm_error_t psmi_timer_process_expired(struct psmi_timer_ctrl *ctrl,
uint64_t t_cyc_expire);
#endif /* _PSMI_TIMER_H */
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