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      1 /*	$NetBSD: rf_callback.c,v 1.26 2026/10/24 00:20:23 tls 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 (at) 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 1.26 2026/10/24 00:20:23 tls 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 #include "rf_raid.h"
     50 
     51 static void rf_ShutdownCallback(void *);
     52 static void
     53 rf_ShutdownCallback(void *arg)
     54 {
     55 	RF_Raid_t *raidPtr;
     56 
     57 	raidPtr = (RF_Raid_t *) arg;
     58 
     59 	pool_destroy(&raidPtr->pools.callbackf);
     60 	pool_destroy(&raidPtr->pools.callbackv);
     61 }
     62 
     63 int
     64 rf_ConfigureCallback(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
     65 		     RF_Config_t *cfgPtr)
     66 {
     67 	size_t stripe_data_bytes, min_cbf, max_cbf, min_cbv, max_cbv;
     68 	u_int max_stripes_per_bp, c;
     69 
     70 	c = raidPtr->numCol;
     71 	stripe_data_bytes = (size_t)raidPtr->Layout.dataSectorsPerStripe <<
     72 	    raidPtr->logBytesPerSector;
     73 	max_stripes_per_bp = howmany(MAXPHYS, stripe_data_bytes) + 1;
     74 
     75 	/* Up to 2 callbacks (stripe lock + forced recon) per active stripe. */
     76 	min_cbf = 2 * (raidPtr->openings * max_stripes_per_bp + 1);
     77 	max_cbf = 2 * min_cbf;
     78 
     79 	/* Up to 3 recon wait lists (head-sep, blocked, buffer) per disk. */
     80 	min_cbv = (raidPtr->Layout.map->SubmitReconBuffer == NULL) ?
     81 	    0 : 3 * (c - 1);
     82 	max_cbv = 2 * min_cbv;
     83 
     84 	rf_pool_init(raidPtr, raidPtr->poolNames.callbackf, &raidPtr->pools.callbackf, sizeof(RF_CallbackFuncDesc_t),
     85 		     "callbackf", min_cbf, max_cbf);
     86 	rf_pool_init(raidPtr, raidPtr->poolNames.callbackv, &raidPtr->pools.callbackv, sizeof(RF_CallbackValueDesc_t),
     87 		     "callbackv", min_cbv, max_cbv);
     88 	rf_ShutdownCreate(listp, rf_ShutdownCallback, raidPtr);
     89 
     90 	return (0);
     91 }
     92 
     93 RF_CallbackFuncDesc_t *
     94 rf_AllocCallbackFuncDesc(RF_Raid_t *raidPtr)
     95 {
     96 	return pool_get(&raidPtr->pools.callbackf, PR_WAITOK);
     97 }
     98 
     99 void
    100 rf_FreeCallbackFuncDesc(RF_Raid_t *raidPtr, RF_CallbackFuncDesc_t *p)
    101 {
    102 	pool_put(&raidPtr->pools.callbackf, p);
    103 }
    104 
    105 RF_CallbackValueDesc_t *
    106 rf_AllocCallbackValueDesc(RF_Raid_t *raidPtr)
    107 {
    108 	return pool_get(&raidPtr->pools.callbackv, PR_WAITOK);
    109 }
    110 
    111 void
    112 rf_FreeCallbackValueDesc(RF_Raid_t *raidPtr, RF_CallbackValueDesc_t *p)
    113 {
    114 	pool_put(&raidPtr->pools.callbackv, p);
    115 }
    116