2c6eb461a7
Mellanox hardware driver(s): - Properly name an inclusion guard - Fix compile warnings regarding unsigned enums - Add two new sysctl nodes - Remove all empty linux header files - Make an error printout more verbose - Use "mod_delayed_work()" instead of cancelling and starting a timeout. - Implement more Linux scatterlist functions. MFC after: 3 days Sponsored by: Mellanox Technologies
156 lines
3.9 KiB
C++
156 lines
3.9 KiB
C++
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_COMPLETION_H_
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#define _LINUX_COMPLETION_H_
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#include <linux/errno.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sleepqueue.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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struct completion {
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unsigned int done;
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};
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#define INIT_COMPLETION(c) ((c).done = 0)
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#define init_completion(c) ((c)->done = 0)
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static inline void
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_complete_common(struct completion *c, int all)
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{
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int wakeup_swapper;
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sleepq_lock(c);
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c->done++;
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if (all)
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wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0);
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else
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wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0);
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sleepq_release(c);
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if (wakeup_swapper)
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kick_proc0();
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}
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#define complete(c) _complete_common(c, 0)
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#define complete_all(c) _complete_common(c, 1)
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/*
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* Indefinite wait for done != 0 with or without signals.
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*/
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static inline long
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_wait_for_common(struct completion *c, int flags)
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{
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flags |= SLEEPQ_SLEEP;
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for (;;) {
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sleepq_lock(c);
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if (c->done)
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break;
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sleepq_add(c, NULL, "completion", flags, 0);
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if (flags & SLEEPQ_INTERRUPTIBLE) {
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if (sleepq_wait_sig(c, 0) != 0)
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return (-ERESTARTSYS);
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} else
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sleepq_wait(c, 0);
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}
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c->done--;
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sleepq_release(c);
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return (0);
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}
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#define wait_for_completion(c) _wait_for_common(c, 0)
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#define wait_for_completion_interuptible(c) \
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_wait_for_common(c, SLEEPQ_INTERRUPTIBLE)
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static inline long
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_wait_for_timeout_common(struct completion *c, long timeout, int flags)
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{
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long end;
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end = ticks + timeout;
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flags |= SLEEPQ_SLEEP;
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for (;;) {
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sleepq_lock(c);
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if (c->done)
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break;
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sleepq_add(c, NULL, "completion", flags, 0);
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sleepq_set_timeout(c, end - ticks);
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if (flags & SLEEPQ_INTERRUPTIBLE) {
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if (sleepq_timedwait_sig(c, 0) != 0)
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return (-ERESTARTSYS);
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} else
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sleepq_timedwait(c, 0);
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}
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c->done--;
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sleepq_release(c);
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timeout = end - ticks;
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return (timeout > 0 ? timeout : 1);
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}
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#define wait_for_completion_timeout(c, timeout) \
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_wait_for_timeout_common(c, timeout, 0)
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#define wait_for_completion_interruptible_timeout(c, timeout) \
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_wait_for_timeout_common(c, timeout, SLEEPQ_INTERRUPTIBLE)
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static inline int
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try_wait_for_completion(struct completion *c)
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{
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int isdone;
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isdone = 1;
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sleepq_lock(c);
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if (c->done)
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c->done--;
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else
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isdone = 0;
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sleepq_release(c);
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return (isdone);
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}
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static inline int
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completion_done(struct completion *c)
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{
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int isdone;
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isdone = 1;
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sleepq_lock(c);
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if (c->done == 0)
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isdone = 0;
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sleepq_release(c);
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return (isdone);
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}
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#endif /* _LINUX_COMPLETION_H_ */
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