1 /* $NetBSD: rf_alloclist.c,v 1.29 2021/07/23 00:54:45 oster Exp $ */
2 /*
3 * Copyright (c) 1995 Carnegie-Mellon University.
4 * All rights reserved.
5 *
6 * Author: Mark Holland
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 * Alloclist.c -- code to manipulate allocation lists
32 *
33 * an allocation list is just a list of AllocListElem structures. Each
34 * such structure contains a fixed-size array of pointers. Calling
35 * FreeAList() causes each pointer to be freed.
36 *
37 ***************************************************************************/
38
39 #include <sys/cdefs.h>
40 __KERNEL_RCSID(0, "$NetBSD: rf_alloclist.c,v 1.29 2021/07/23 00:54:45 oster Exp $");
41
42 #include <dev/raidframe/raidframevar.h>
43
44 #include "rf_options.h"
45 #include "rf_threadstuff.h"
46 #include "rf_alloclist.h"
47 #include "rf_debugMem.h"
48 #include "rf_etimer.h"
49 #include "rf_general.h"
50 #include "rf_shutdown.h"
51 #include "rf_netbsd.h"
52
53 #include <sys/pool.h>
54
55 #define RF_AL_FREELIST_MAX 256
56 #define RF_AL_FREELIST_MIN 64
57
58 static void rf_ShutdownAllocList(void *);
59
rf_ShutdownAllocList(void * ignored)60 static void rf_ShutdownAllocList(void *ignored)
61 {
62 pool_destroy(&rf_alloclist_pool);
63 }
64
65 int
rf_ConfigureAllocList(RF_ShutdownList_t ** listp)66 rf_ConfigureAllocList(RF_ShutdownList_t **listp)
67 {
68
69 pool_init(&rf_alloclist_pool, sizeof(RF_AllocListElem_t), 0, 0, 0, "rf_alloclist_pl", NULL, IPL_BIO);
70 pool_sethiwat(&rf_alloclist_pool, RF_AL_FREELIST_MAX);
71 pool_prime(&rf_alloclist_pool, RF_AL_FREELIST_MIN);
72
73 rf_ShutdownCreate(listp, rf_ShutdownAllocList, NULL);
74
75 return (0);
76 }
77
78
79 /* we expect the lists to have at most one or two elements, so we're willing
80 * to search for the end. If you ever observe the lists growing longer,
81 * increase POINTERS_PER_ALLOC_LIST_ELEMENT.
82 */
83 void
rf_real_AddToAllocList(RF_AllocListElem_t * l,void * p,int size)84 rf_real_AddToAllocList(RF_AllocListElem_t *l, void *p, int size)
85 {
86 RF_AllocListElem_t *newelem;
87
88 for (; l->next; l = l->next)
89 RF_ASSERT(l->numPointers == RF_POINTERS_PER_ALLOC_LIST_ELEMENT); /* find end of list */
90
91 RF_ASSERT(l->numPointers >= 0 && l->numPointers <= RF_POINTERS_PER_ALLOC_LIST_ELEMENT);
92 if (l->numPointers == RF_POINTERS_PER_ALLOC_LIST_ELEMENT) {
93 newelem = rf_real_MakeAllocList();
94 l->next = newelem;
95 l = newelem;
96 }
97 l->pointers[l->numPointers] = p;
98 l->sizes[l->numPointers] = size;
99 l->numPointers++;
100
101 }
102
103 void
rf_FreeAllocList(RF_AllocListElem_t * l)104 rf_FreeAllocList(RF_AllocListElem_t *l)
105 {
106 int i;
107 RF_AllocListElem_t *temp, *p;
108
109 for (p = l; p; p = p->next) {
110 RF_ASSERT(p->numPointers >= 0 &&
111 p->numPointers <= RF_POINTERS_PER_ALLOC_LIST_ELEMENT);
112 for (i = 0; i < p->numPointers; i++) {
113 RF_ASSERT(p->pointers[i]);
114 RF_Free(p->pointers[i], p->sizes[i]);
115 }
116 }
117 while (l) {
118 temp = l;
119 l = l->next;
120 pool_put(&rf_alloclist_pool, temp);
121 }
122 }
123
124 RF_AllocListElem_t *
rf_real_MakeAllocList(void)125 rf_real_MakeAllocList(void)
126 {
127 return pool_get(&rf_alloclist_pool, PR_WAITOK | PR_ZERO);
128 }
129