3 * [NetBSD for NEC PC98 series]
4 * Copyright (c) 1994, 1995, 1996 NetBSD/pc98 porting staff.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
30 * $FreeBSD: src/sys/i386/isa/ccbque.h,v 1.3.6.2 2000/10/21 07:44:24 nyan Exp $
31 * $DragonFly: src/sys/sys/ccbque.h,v 1.4 2003/08/26 21:42:19 rob Exp $
34 * Common command control queue funcs.
35 * Written by N. Honda.
41 #define CCB_MWANTED 0x01
43 /* (I) structure and prototype */
44 #define GENERIC_CCB_ASSERT(DEV, CCBTYPE) \
45 TAILQ_HEAD(CCBTYPE##tab, CCBTYPE); \
46 struct CCBTYPE##que { \
47 struct CCBTYPE##tab CCBTYPE##tab; \
53 void DEV##_init_ccbque (int); \
54 struct CCBTYPE *DEV##_get_ccb (void); \
55 void DEV##_free_ccb (struct CCBTYPE *);
57 /* (II) static allocated memory */
58 #define GENERIC_CCB_STATIC_ALLOC(DEV, CCBTYPE) \
59 static struct CCBTYPE##que CCBTYPE##que;
62 #define GENERIC_CCB(DEV, CCBTYPE, CHAIN) \
65 DEV##_init_ccbque(count) \
68 if (CCBTYPE##que.maxccb == 0) \
69 TAILQ_INIT(&CCBTYPE##que.CCBTYPE##tab); \
70 CCBTYPE##que.maxccb += count; \
79 if (CCBTYPE##que.count < CCBTYPE##que.maxccb) \
81 CCBTYPE##que.count ++; \
82 cb = CCBTYPE##que.CCBTYPE##tab.tqh_first; \
85 TAILQ_REMOVE(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN);\
90 cb = malloc(sizeof(*cb), M_DEVBUF, M_NOWAIT); \
93 bzero(cb, sizeof(*cb)); \
97 CCBTYPE##que.count --; \
109 struct CCBTYPE *cb; \
113 TAILQ_INSERT_TAIL(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN); \
114 CCBTYPE##que.count --; \
116 if (CCBTYPE##que.flags & CCB_MWANTED) \
118 CCBTYPE##que.flags &= ~CCB_MWANTED; \
119 wakeup ((caddr_t) &CCBTYPE##que.count); \
123 #endif /* !_CCBQUE_H_ */