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drm_wait_netbsd.h revision 1.1.2.5 
      1 /*	$NetBSD: drm_wait_netbsd.h,v 1.1.2.5 2013/07/24 02:36:31 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _DRM_DRM_WAIT_NETBSD_H_
     33 #define _DRM_DRM_WAIT_NETBSD_H_
     34 
     35 #include <sys/param.h>
     36 #include <sys/condvar.h>
     37 #include <sys/kernel.h>
     38 #include <sys/mutex.h>
     39 #include <sys/systm.h>
     40 
     41 #include <linux/mutex.h>
     42 #include <linux/spinlock.h>
     43 
     44 typedef kcondvar_t drm_waitqueue_t;
     45 
     46 #define	DRM_HZ	hz		/* XXX Hurk...  */
     47 
     48 static inline void
     49 DRM_INIT_WAITQUEUE(drm_waitqueue_t *q, const char *name)
     50 {
     51 	cv_init(q, name);
     52 }
     53 
     54 static inline void
     55 DRM_DESTROY_WAITQUEUE(drm_waitqueue_t *q)
     56 {
     57 	cv_destroy(q);
     58 }
     59 
     60 static inline void
     61 DRM_WAKEUP_ONE(drm_waitqueue_t *q, struct mutex *interlock)
     62 {
     63 	KASSERT(mutex_is_locked(interlock));
     64 	cv_signal(q);
     65 }
     66 
     67 static inline void
     68 DRM_WAKEUP_ALL(drm_waitqueue_t *q, struct mutex *interlock)
     69 {
     70 	KASSERT(mutex_is_locked(interlock));
     71 	cv_broadcast(q);
     72 }
     73 
     74 static inline void
     75 DRM_SPIN_WAKEUP_ONE(drm_waitqueue_t *q, spinlock_t *interlock)
     76 {
     77 	KASSERT(spin_is_locked(interlock));
     78 	cv_signal(q);
     79 }
     80 
     81 static inline void
     82 DRM_SPIN_WAKEUP_ALL(drm_waitqueue_t *q, spinlock_t *interlock)
     83 {
     84 	KASSERT(spin_is_locked(interlock));
     85 	cv_broadcast(q);
     86 }
     87 
     88 #define	DRM_WAIT_UNTIL(RET, Q, INTERLOCK, CONDITION)	do		\
     89 {									\
     90 	KASSERT(mutex_is_locked((INTERLOCK)));				\
     91 	while (!(CONDITION)) {						\
     92 		/* XXX errno NetBSD->Linux */				\
     93 		(RET) = -cv_wait_sig((Q), &(INTERLOCK)->mtx_lock);	\
     94 		if (RET)						\
     95 			break;						\
     96 	}								\
     97 } while (0)
     98 
     99 #define	DRM_TIMED_WAIT_UNTIL(RET, Q, INTERLOCK, TICKS, CONDITION) do	\
    100 {									\
    101 	KASSERT(mutex_is_locked((INTERLOCK)));				\
    102 	while (!(CONDITION)) {						\
    103 		/* XXX errno NetBSD->Linux */				\
    104 		(RET) = -cv_timedwait_sig((Q), &(INTERLOCK)->mtx_lock,	\
    105 		    (TICKS));						\
    106 		if (RET)						\
    107 			break;						\
    108 	}								\
    109 } while (0)
    110 
    111 #define	DRM_SPIN_WAIT_UNTIL(RET, Q, INTERLOCK, CONDITION)	do	\
    112 {									\
    113 	KASSERT(spin_is_locked((INTERLOCK)));				\
    114 	while (!(CONDITION)) {						\
    115 		/* XXX errno NetBSD->Linux */				\
    116 		(RET) = -cv_wait_sig((Q), &(INTERLOCK)->sl_lock);	\
    117 		if (RET)						\
    118 			break;						\
    119 	}								\
    120 } while (0)
    121 
    122 #define	DRM_SPIN_TIMED_WAIT_UNTIL(RET, Q, INTERLOCK, TICKS, CONDITION)	\
    123 	do								\
    124 {									\
    125 	KASSERT(spin_is_locked((INTERLOCK)));				\
    126 	while (!(CONDITION)) {						\
    127 		/* XXX errno NetBSD->Linux */				\
    128 		(RET) = -cv_timedwait_sig((Q), &(INTERLOCK)->sl_lock,	\
    129 		    (TICKS));						\
    130 		if (RET)						\
    131 			break;						\
    132 	}								\
    133 } while (0)
    134 
    135 #endif  /* _DRM_DRM_WAIT_NETBSD_H_ */
    136