sys/dev/raidframe/rf_callback.c

   1 /*      $NetBSD: rf_callback.c,v 1.21 2009/03/14 15:36:20 dsl Exp $     */
   2 /*
   3  * Copyright (c) 1995 Carnegie-Mellon University.
   4  * All rights reserved.
   5  *
   6  * Author: Jim Zelenka
   7  *
   8  * Permission to use, copy, modify and distribute this software and
   9  * its documentation is hereby granted, provided that both the copyright
  10  * notice and this permission notice appear in all copies of the
  11  * software, derivative works or modified versions, and any portions
  12  * thereof, and that both notices appear in supporting documentation.
  13  *
  14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  17  *
  18  * Carnegie Mellon requests users of this software to return to
  19  *
  20  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  21  *  School of Computer Science
  22  *  Carnegie Mellon University
  23  *  Pittsburgh PA 15213-3890
  24  *
  25  * any improvements or extensions that they make and grant Carnegie the
  26  * rights to redistribute these changes.
  27  */
  28
  29 /*****************************************************************************
  30  *
  31  * callback.c -- code to manipulate callback descriptor
  32  *
  33  ****************************************************************************/
  34
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: rf_callback.c,v 1.21 2009/03/14 15:36:20 dsl Exp $");
  38
  39 #include <dev/raidframe/raidframevar.h>
  40 #include <sys/pool.h>
  41
  42 #include "rf_archs.h"
  43 #include "rf_threadstuff.h"
  44 #include "rf_callback.h"
  45 #include "rf_debugMem.h"
  46 #include "rf_general.h"
  47 #include "rf_shutdown.h"
  48 #include "rf_netbsd.h"
  49
  50 #define RF_MAX_FREE_CALLBACK 64
  51 #define RF_MIN_FREE_CALLBACK 32
  52
  53 static void rf_ShutdownCallback(void *);
  54 static void
  55 rf_ShutdownCallback(void *ignored)
  56 {
  57         pool_destroy(&rf_pools.callback);
  58 }
  59
  60 int
  61 rf_ConfigureCallback(RF_ShutdownList_t **listp)
  62 {
  63
  64         rf_pool_init(&rf_pools.callback, sizeof(RF_CallbackDesc_t),
  65                      "rf_callbackpl", RF_MIN_FREE_CALLBACK, RF_MAX_FREE_CALLBACK);
  66         rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL);
  67
  68         return (0);
  69 }
  70
  71 RF_CallbackDesc_t *
  72 rf_AllocCallbackDesc(void)
  73 {
  74         RF_CallbackDesc_t *p;
  75
  76         p = pool_get(&rf_pools.callback, PR_WAITOK);
  77         return (p);
  78 }
  79
  80 void
  81 rf_FreeCallbackDesc(RF_CallbackDesc_t *p)
  82 {
  83         pool_put(&rf_pools.callback, p);
  84 }