sis_ds.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:9k
- /* sis_ds.c -- Private header for Direct Rendering Manager -*- linux-c -*-
- * Created: Mon Jan 4 10:05:05 1999 by sclin@sis.com.tw
- *
- * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
- * All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * Authors:
- * Sung-Ching Lin <sclin@sis.com.tw>
- *
- */
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
- #include <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/poll.h>
- #include <asm/io.h>
- #include <linux/pci.h>
- #include "sis_ds.h"
- /* Set Data Structure, not check repeated value
- * temporarily used
- */
- set_t *setInit(void)
- {
- int i;
- set_t *set;
- set = (set_t *)MALLOC(sizeof(set_t));
- if (set) {
- for(i = 0; i < SET_SIZE; i++){
- set->list[i].free_next = i+1;
- set->list[i].alloc_next = -1;
- }
- set->list[SET_SIZE-1].free_next = -1;
- set->free = 0;
- set->alloc = -1;
- set->trace = -1;
- }
- return set;
- }
- int setAdd(set_t *set, ITEM_TYPE item)
- {
- int free = set->free;
-
- if(free != -1){
- set->list[free].val = item;
- set->free = set->list[free].free_next;
- }
- else{
- return 0;
- }
- set->list[free].alloc_next = set->alloc;
- set->alloc = free;
- set->list[free].free_next = -1;
- return 1;
- }
- int setDel(set_t *set, ITEM_TYPE item)
- {
- int alloc = set->alloc;
- int prev = -1;
-
- while(alloc != -1){
- if(set->list[alloc].val == item){
- if(prev != -1)
- set->list[prev].alloc_next = set->list[alloc].alloc_next;
- else
- set->alloc = set->list[alloc].alloc_next;
- break;
- }
- prev = alloc;
- alloc = set->list[alloc].alloc_next;
- }
- if(alloc == -1)
- return 0;
-
- set->list[alloc].free_next = set->free;
- set->free = alloc;
- set->list[alloc].alloc_next = -1;
- return 1;
- }
- /* setFirst -> setAdd -> setNext is wrong */
- int setFirst(set_t *set, ITEM_TYPE *item)
- {
- if(set->alloc == -1)
- return 0;
- *item = set->list[set->alloc].val;
- set->trace = set->list[set->alloc].alloc_next;
- return 1;
- }
- int setNext(set_t *set, ITEM_TYPE *item)
- {
- if(set->trace == -1)
- return 0;
-
- *item = set->list[set->trace].val;
- set->trace = set->list[set->trace].alloc_next;
- return 1;
- }
- int setDestroy(set_t *set)
- {
- FREE(set);
- return 1;
- }
- /*
- * GLX Hardware Device Driver common code
- * Copyright (C) 1999 Keith Whitwell
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
- * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
- #define ISFREE(bptr) ((bptr)->free)
- #define PRINTF(fmt, arg...) do{}while(0)
- #define fprintf(fmt, arg...) do{}while(0)
- static void *calloc(size_t nmemb, size_t size)
- {
- void *addr;
- addr = kmalloc(nmemb*size, GFP_KERNEL);
- if (addr)
- memset(addr, 0, nmemb*size);
- return addr;
- }
- #define free(n) kfree(n)
-
- void mmDumpMemInfo( memHeap_t *heap )
- {
- TMemBlock *p;
- PRINTF ("Memory heap %p:n", heap);
- if (heap == 0) {
- PRINTF (" heap == 0n");
- } else {
- p = (TMemBlock *)heap;
- while (p) {
- PRINTF (" Offset:%08x, Size:%08x, %c%cn",p->ofs,p->size,
- p->free ? '.':'U',
- p->reserved ? 'R':'.');
- p = p->next;
- }
- }
- PRINTF ("End of memory blocksn");
- }
- memHeap_t *mmInit(int ofs,
- int size)
- {
- PMemBlock blocks;
-
- if (size <= 0) {
- return 0;
- }
- blocks = (TMemBlock *) calloc(1,sizeof(TMemBlock));
- if (blocks) {
- blocks->ofs = ofs;
- blocks->size = size;
- blocks->free = 1;
- return (memHeap_t *)blocks;
- } else
- return 0;
- }
- /* Kludgey workaround for existing i810 server. Remove soon.
- */
- memHeap_t *mmAddRange( memHeap_t *heap,
- int ofs,
- int size )
- {
- PMemBlock blocks;
- blocks = (TMemBlock *) calloc(2,sizeof(TMemBlock));
- if (blocks) {
- blocks[0].size = size;
- blocks[0].free = 1;
- blocks[0].ofs = ofs;
- blocks[0].next = &blocks[1];
- /* Discontinuity - stops JoinBlock from trying to join non-adjacent
- * ranges.
- */
- blocks[1].size = 0;
- blocks[1].free = 0;
- blocks[1].ofs = ofs+size;
- blocks[1].next = (PMemBlock) heap;
- return (memHeap_t *)blocks;
- }
- else
- return heap;
- }
- static TMemBlock* SliceBlock(TMemBlock *p,
- int startofs, int size,
- int reserved, int alignment)
- {
- TMemBlock *newblock;
- /* break left */
- if (startofs > p->ofs) {
- newblock = (TMemBlock*) calloc(1,sizeof(TMemBlock));
- newblock->ofs = startofs;
- newblock->size = p->size - (startofs - p->ofs);
- newblock->free = 1;
- newblock->next = p->next;
- p->size -= newblock->size;
- p->next = newblock;
- p = newblock;
- }
- /* break right */
- if (size < p->size) {
- newblock = (TMemBlock*) calloc(1,sizeof(TMemBlock));
- newblock->ofs = startofs + size;
- newblock->size = p->size - size;
- newblock->free = 1;
- newblock->next = p->next;
- p->size = size;
- p->next = newblock;
- }
- /* p = middle block */
- p->align = alignment;
- p->free = 0;
- p->reserved = reserved;
- return p;
- }
- PMemBlock mmAllocMem( memHeap_t *heap, int size, int align2, int startSearch)
- {
- int mask,startofs,endofs;
- TMemBlock *p;
- if (!heap || align2 < 0 || size <= 0)
- return NULL;
- mask = (1 << align2)-1;
- startofs = 0;
- p = (TMemBlock *)heap;
- while (p) {
- if (ISFREE(p)) {
- startofs = (p->ofs + mask) & ~mask;
- if ( startofs < startSearch ) {
- startofs = startSearch;
- }
- endofs = startofs+size;
- if (endofs <= (p->ofs+p->size))
- break;
- }
- p = p->next;
- }
- if (!p)
- return NULL;
- p = SliceBlock(p,startofs,size,0,mask+1);
- p->heap = heap;
- return p;
- }
- static __inline__ int Join2Blocks(TMemBlock *p)
- {
- if (p->free && p->next && p->next->free) {
- TMemBlock *q = p->next;
- p->size += q->size;
- p->next = q->next;
- free(q);
- return 1;
- }
- return 0;
- }
- int mmFreeMem(PMemBlock b)
- {
- TMemBlock *p,*prev;
- if (!b)
- return 0;
- if (!b->heap) {
- fprintf(stderr, "no heapn");
- return -1;
- }
- p = b->heap;
- prev = NULL;
- while (p && p != b) {
- prev = p;
- p = p->next;
- }
- if (!p || p->free || p->reserved) {
- if (!p)
- fprintf(stderr, "block not found in heapn");
- else if (p->free)
- fprintf(stderr, "block already freen");
- else
- fprintf(stderr, "block is reservedn");
- return -1;
- }
- p->free = 1;
- Join2Blocks(p);
- if (prev)
- Join2Blocks(prev);
- return 0;
- }
- int mmReserveMem(memHeap_t *heap, int offset,int size)
- {
- int endofs;
- TMemBlock *p;
- if (!heap || size <= 0)
- return -1;
- endofs = offset+size;
- p = (TMemBlock *)heap;
- while (p && p->ofs <= offset) {
- if (ISFREE(p) && endofs <= (p->ofs+p->size)) {
- SliceBlock(p,offset,size,1,1);
- return 0;
- }
- p = p->next;
- }
- return -1;
- }
- int mmFreeReserved(memHeap_t *heap, int offset)
- {
- TMemBlock *p,*prev;
- if (!heap)
- return -1;
- p = (TMemBlock *)heap;
- prev = NULL;
- while (p && p->ofs != offset) {
- prev = p;
- p = p->next;
- }
- if (!p || !p->reserved)
- return -1;
- p->free = 1;
- p->reserved = 0;
- Join2Blocks(p);
- if (prev)
- Join2Blocks(prev);
- return 0;
- }
- void mmDestroy(memHeap_t *heap)
- {
- TMemBlock *p,*q;
- if (!heap)
- return;
- p = (TMemBlock *)heap;
- while (p) {
- q = p->next;
- free(p);
- p = q;
- }
- }