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