Current Path : /sys/i386/isa/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/i386/isa/ccbque.h |
/* $NetBSD$ */ /*- * [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: release/9.1.0/sys/i386/isa/ccbque.h 139790 2005-01-06 22:18:23Z imp $ */ /* * 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(int); \ struct CCBTYPE *DEV##_get_ccb(void); \ void DEV##_free_ccb(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(); \ \ if (CCBTYPE##que.count < CCBTYPE##que.maxccb) \ { \ CCBTYPE##que.count ++; \ cb = TAILQ_FIRST(&(CCBTYPE##que.CCBTYPE##tab)); \ 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_ */