--- /dev/null
+/*
+ * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ */
+
+
+#include "yaffs_allocator.h"
+#include "yaffs_guts.h"
+#include "yaffs_trace.h"
+#include "yportenv.h"
+
+#ifdef CONFIG_YAFFS_YMALLOC_ALLOCATOR
+
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
+{
+ return (yaffs_Tnode *)YMALLOC(dev->tnodeSize);
+}
+
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+{
+ dev = dev;
+ YFREE(tn);
+}
+
+void yaffs_InitialiseRawObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
+{
+ dev = dev;
+}
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+{
+ dev = dev;
+ return (yaffs_Object *) YMALLOC(sizeof(yaffs_Object));
+}
+
+
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
+{
+
+ dev = dev;
+ YFREE(obj);
+}
+
+#else
+
+struct yaffs_TnodeList_struct {
+ struct yaffs_TnodeList_struct *next;
+ yaffs_Tnode *tnodes;
+};
+
+typedef struct yaffs_TnodeList_struct yaffs_TnodeList;
+
+struct yaffs_ObjectList_struct {
+ yaffs_Object *objects;
+ struct yaffs_ObjectList_struct *next;
+};
+
+typedef struct yaffs_ObjectList_struct yaffs_ObjectList;
+
+
+struct yaffs_AllocatorStruct {
+ int nTnodesCreated;
+ yaffs_Tnode *freeTnodes;
+ int nFreeTnodes;
+ yaffs_TnodeList *allocatedTnodeList;
+
+ int nObjectsCreated;
+ yaffs_Object *freeObjects;
+ int nFreeObjects;
+
+ yaffs_ObjectList *allocatedObjectList;
+};
+
+typedef struct yaffs_AllocatorStruct yaffs_Allocator;
+
+
+static void yaffs_DeinitialiseRawTnodes(yaffs_Device *dev)
+{
+
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+
+ yaffs_TnodeList *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocatedTnodeList) {
+ tmp = allocator->allocatedTnodeList->next;
+
+ YFREE(allocator->allocatedTnodeList->tnodes);
+ YFREE(allocator->allocatedTnodeList);
+ allocator->allocatedTnodeList = tmp;
+
+ }
+
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->nTnodesCreated = 0;
+}
+
+static void yaffs_InitialiseRawTnodes(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator){
+ allocator->allocatedTnodeList = NULL;
+ allocator->freeTnodes = NULL;
+ allocator->nFreeTnodes = 0;
+ allocator->nTnodesCreated = 0;
+ } else
+ YBUG();
+}
+
+static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ int i;
+ yaffs_Tnode *newTnodes;
+ __u8 *mem;
+ yaffs_Tnode *curr;
+ yaffs_Tnode *next;
+ yaffs_TnodeList *tnl;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (nTnodes < 1)
+ return YAFFS_OK;
+
+
+ /* make these things */
+
+ newTnodes = YMALLOC(nTnodes * dev->tnodeSize);
+ mem = (__u8 *)newTnodes;
+
+ if (!newTnodes) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("yaffs: Could not allocate Tnodes" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ /* Hook them into the free list */
+#if 0
+ for (i = 0; i < nTnodes - 1; i++) {
+ newTnodes[i].internal[0] = &newTnodes[i + 1];
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+#endif
+ }
+
+ newTnodes[nTnodes - 1].internal[0] = allocator->freeTnodes;
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+#endif
+ allocator->freeTnodes = newTnodes;
+#else
+ /* New hookup for wide tnodes */
+ for (i = 0; i < nTnodes - 1; i++) {
+ curr = (yaffs_Tnode *) &mem[i * dev->tnodeSize];
+ next = (yaffs_Tnode *) &mem[(i+1) * dev->tnodeSize];
+ curr->internal[0] = next;
+ }
+
+ curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * dev->tnodeSize];
+ curr->internal[0] = allocator->freeTnodes;
+ allocator->freeTnodes = (yaffs_Tnode *)mem;
+
+#endif
+
+
+ allocator->nFreeTnodes += nTnodes;
+ allocator->nTnodesCreated += nTnodes;
+
+ /* Now add this bunch of tnodes to a list for freeing up.
+ * NB If we can't add this to the management list it isn't fatal
+ * but it just means we can't free this bunch of tnodes later.
+ */
+
+ tnl = YMALLOC(sizeof(yaffs_TnodeList));
+ if (!tnl) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR
+ ("yaffs: Could not add tnodes to management list" TENDSTR)));
+ return YAFFS_FAIL;
+ } else {
+ tnl->tnodes = newTnodes;
+ tnl->next = allocator->allocatedTnodeList;
+ allocator->allocatedTnodeList = tnl;
+ }
+
+ T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR)));
+
+ return YAFFS_OK;
+}
+
+
+yaffs_Tnode *yaffs_AllocateRawTnode(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = (yaffs_Allocator *)dev->allocator;
+ yaffs_Tnode *tn = NULL;
+
+ if(!allocator){
+ YBUG();
+ return NULL;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeTnodes)
+ yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES);
+
+ if (allocator->freeTnodes) {
+ tn = allocator->freeTnodes;
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) {
+ /* Hoosterman, this thing looks like it isn't in the list */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Tnode list bug 1" TENDSTR)));
+ }
+#endif
+ allocator->freeTnodes = allocator->freeTnodes->internal[0];
+ allocator->nFreeTnodes--;
+ }
+
+ return tn;
+}
+
+/* FreeTnode frees up a tnode and puts it back on the free list */
+void yaffs_FreeRawTnode(yaffs_Device *dev, yaffs_Tnode *tn)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ if (tn) {
+#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG
+ if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) {
+ /* Hoosterman, this thing looks like it is already in the list */
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR("yaffs: Tnode list bug 2" TENDSTR)));
+ }
+ tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1;
+#endif
+ tn->internal[0] = allocator->freeTnodes;
+ allocator->freeTnodes = tn;
+ allocator->nFreeTnodes++;
+ }
+ dev->nCheckpointBlocksRequired = 0; /* force recalculation*/
+}
+
+
+
+static void yaffs_InitialiseRawObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(allocator) {
+ allocator->allocatedObjectList = NULL;
+ allocator->freeObjects = NULL;
+ allocator->nFreeObjects = 0;
+ } else
+ YBUG();
+}
+
+static void yaffs_DeinitialiseRawObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+ yaffs_ObjectList *tmp;
+
+ if(!allocator){
+ YBUG();
+ return;
+ }
+
+ while (allocator->allocatedObjectList) {
+ tmp = allocator->allocatedObjectList->next;
+ YFREE(allocator->allocatedObjectList->objects);
+ YFREE(allocator->allocatedObjectList);
+
+ allocator->allocatedObjectList = tmp;
+ }
+
+ allocator->freeObjects = NULL;
+ allocator->nFreeObjects = 0;
+ allocator->nObjectsCreated = 0;
+}
+
+
+static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects)
+{
+ yaffs_Allocator *allocator = dev->allocator;
+
+ int i;
+ yaffs_Object *newObjects;
+ yaffs_ObjectList *list;
+
+ if(!allocator){
+ YBUG();
+ return YAFFS_FAIL;
+ }
+
+ if (nObjects < 1)
+ return YAFFS_OK;
+
+ /* make these things */
+ newObjects = YMALLOC(nObjects * sizeof(yaffs_Object));
+ list = YMALLOC(sizeof(yaffs_ObjectList));
+
+ if (!newObjects || !list) {
+ if (newObjects){
+ YFREE(newObjects);
+ newObjects = NULL;
+ }
+ if (list){
+ YFREE(list);
+ list = NULL;
+ }
+ T(YAFFS_TRACE_ALLOCATE,
+ (TSTR("yaffs: Could not allocate more objects" TENDSTR)));
+ return YAFFS_FAIL;
+ }
+
+ /* Hook them into the free list */
+ for (i = 0; i < nObjects - 1; i++) {
+ newObjects[i].siblings.next =
+ (struct ylist_head *)(&newObjects[i + 1]);
+ }
+
+ newObjects[nObjects - 1].siblings.next = (void *)allocator->freeObjects;
+ allocator->freeObjects = newObjects;
+ allocator->nFreeObjects += nObjects;
+ allocator->nObjectsCreated += nObjects;
+
+ /* Now add this bunch of Objects to a list for freeing up. */
+
+ list->objects = newObjects;
+ list->next = allocator->allocatedObjectList;
+ allocator->allocatedObjectList = list;
+
+ return YAFFS_OK;
+}
+
+yaffs_Object *yaffs_AllocateRawObject(yaffs_Device *dev)
+{
+ yaffs_Object *obj = NULL;
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator) {
+ YBUG();
+ return obj;
+ }
+
+ /* If there are none left make more */
+ if (!allocator->freeObjects)
+ yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS);
+
+ if (allocator->freeObjects) {
+ obj = allocator->freeObjects;
+ allocator->freeObjects =
+ (yaffs_Object *) (allocator->freeObjects->siblings.next);
+ allocator->nFreeObjects--;
+ }
+
+ return obj;
+}
+
+
+void yaffs_FreeRawObject(yaffs_Device *dev, yaffs_Object *obj)
+{
+
+ yaffs_Allocator *allocator = dev->allocator;
+
+ if(!allocator)
+ YBUG();
+ else {
+ /* Link into the free list. */
+ obj->siblings.next = (struct ylist_head *)(allocator->freeObjects);
+ allocator->freeObjects = obj;
+ allocator->nFreeObjects++;
+ }
+}
+
+void yaffs_DeinitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ if(dev->allocator){
+ yaffs_DeinitialiseRawTnodes(dev);
+ yaffs_DeinitialiseRawObjects(dev);
+
+ YFREE(dev->allocator);
+ dev->allocator=NULL;
+ } else
+ YBUG();
+}
+
+void yaffs_InitialiseRawTnodesAndObjects(yaffs_Device *dev)
+{
+ yaffs_Allocator *allocator;
+
+ if(!dev->allocator){
+ allocator = YMALLOC(sizeof(yaffs_Allocator));
+ if(allocator){
+ dev->allocator = allocator;
+ yaffs_InitialiseRawTnodes(dev);
+ yaffs_InitialiseRawObjects(dev);
+ }
+ } else
+ YBUG();
+}
+
+
+#endif
projects / yaffs2.git / blobdiff