124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* $NetBSD$ */
|
|
/*
|
|
* [NetBSD for NEC PC98 series]
|
|
* Copyright (c) 1994, 1995, 1996 NetBSD/pc98 porting staff.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
/*
|
|
* Common command control queue funcs.
|
|
* Written by N. Honda.
|
|
*/
|
|
|
|
#ifndef _CCBQUE_H_
|
|
#define _CCBQUE_H_
|
|
|
|
#define CCB_MWANTED 0x01
|
|
|
|
/* (I) structure and prototype */
|
|
#define GENERIC_CCB_ASSERT(DEV, CCBTYPE) \
|
|
TAILQ_HEAD(CCBTYPE##tab, CCBTYPE); \
|
|
struct CCBTYPE##que { \
|
|
struct CCBTYPE##tab CCBTYPE##tab; \
|
|
int count; \
|
|
int maxccb; \
|
|
u_int flags; \
|
|
}; \
|
|
\
|
|
void DEV##_init_ccbque __P((int)); \
|
|
struct CCBTYPE *DEV##_get_ccb __P((void)); \
|
|
void DEV##_free_ccb __P((register struct CCBTYPE *));
|
|
|
|
/* (II) static allocated memory */
|
|
#define GENERIC_CCB_STATIC_ALLOC(DEV, CCBTYPE) \
|
|
static struct CCBTYPE##que CCBTYPE##que;
|
|
|
|
/* (III) functions */
|
|
#define GENERIC_CCB(DEV, CCBTYPE, CHAIN) \
|
|
\
|
|
void \
|
|
DEV##_init_ccbque(count) \
|
|
int count; \
|
|
{ \
|
|
if (CCBTYPE##que.maxccb == 0) \
|
|
TAILQ_INIT(&CCBTYPE##que.CCBTYPE##tab); \
|
|
CCBTYPE##que.maxccb += count; \
|
|
} \
|
|
\
|
|
struct CCBTYPE * \
|
|
DEV##_get_ccb() \
|
|
{ \
|
|
register struct CCBTYPE *cb; \
|
|
int s = splcam(); \
|
|
\
|
|
again: \
|
|
if (CCBTYPE##que.count < CCBTYPE##que.maxccb) \
|
|
{ \
|
|
CCBTYPE##que.count ++; \
|
|
cb = CCBTYPE##que.CCBTYPE##tab.tqh_first; \
|
|
if (cb != NULL) \
|
|
{ \
|
|
TAILQ_REMOVE(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN);\
|
|
goto out; \
|
|
} \
|
|
else \
|
|
{ \
|
|
cb = malloc(sizeof(*cb), M_DEVBUF, M_NOWAIT); \
|
|
if (cb != NULL) \
|
|
{ \
|
|
bzero(cb, sizeof(*cb)); \
|
|
goto out; \
|
|
} \
|
|
} \
|
|
CCBTYPE##que.count --; \
|
|
} \
|
|
\
|
|
cb = NULL; \
|
|
\
|
|
out: \
|
|
splx(s); \
|
|
return cb; \
|
|
} \
|
|
\
|
|
void \
|
|
DEV##_free_ccb(cb) \
|
|
register struct CCBTYPE *cb; \
|
|
{ \
|
|
int s = splcam(); \
|
|
\
|
|
TAILQ_INSERT_TAIL(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN); \
|
|
CCBTYPE##que.count --; \
|
|
\
|
|
if (CCBTYPE##que.flags & CCB_MWANTED) \
|
|
{ \
|
|
CCBTYPE##que.flags &= ~CCB_MWANTED; \
|
|
wakeup ((caddr_t) &CCBTYPE##que.count); \
|
|
} \
|
|
splx(s); \
|
|
}
|
|
#endif /* !_CCBQUE_H_ */
|