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
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28 * POSSIBILITY OF SUCH DAMAGE.
33 * Common command control queue funcs.
34 * Written by N. Honda.
40 #define CCB_MWANTED 0x01
42 /* (I) structure and prototype */
43 #define GENERIC_CCB_ASSERT(DEV, CCBTYPE) \
44 TAILQ_HEAD(CCBTYPE##tab, CCBTYPE); \
45 struct CCBTYPE##que { \
46 struct CCBTYPE##tab CCBTYPE##tab; \
52 void DEV##_init_ccbque(int); \
53 struct CCBTYPE *DEV##_get_ccb(void); \
54 void DEV##_free_ccb(register struct CCBTYPE *);
56 /* (II) static allocated memory */
57 #define GENERIC_CCB_STATIC_ALLOC(DEV, CCBTYPE) \
58 static struct CCBTYPE##que CCBTYPE##que;
61 #define GENERIC_CCB(DEV, CCBTYPE, CHAIN) \
64 DEV##_init_ccbque(count) \
67 if (CCBTYPE##que.maxccb == 0) \
68 TAILQ_INIT(&CCBTYPE##que.CCBTYPE##tab); \
69 CCBTYPE##que.maxccb += count; \
75 register struct CCBTYPE *cb; \
78 if (CCBTYPE##que.count < CCBTYPE##que.maxccb) \
80 CCBTYPE##que.count ++; \
81 cb = TAILQ_FIRST(&(CCBTYPE##que.CCBTYPE##tab)); \
84 TAILQ_REMOVE(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN);\
89 cb = malloc(sizeof(*cb), M_DEVBUF, M_NOWAIT); \
92 bzero(cb, sizeof(*cb)); \
96 CCBTYPE##que.count --; \
108 register struct CCBTYPE *cb; \
112 TAILQ_INSERT_TAIL(&CCBTYPE##que.CCBTYPE##tab, cb, CHAIN); \
113 CCBTYPE##que.count --; \
115 if (CCBTYPE##que.flags & CCB_MWANTED) \
117 CCBTYPE##que.flags &= ~CCB_MWANTED; \
118 wakeup ((caddr_t) &CCBTYPE##que.count); \
122 #endif /* !_CCBQUE_H_ */