drivers/char/drm/via_ds.h

   1 /*
   2  * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4  * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan.
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sub license,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  */
  26 #ifndef _via_ds_h_
  27 #define _via_ds_h_
  28
  29 #include "drmP.h"
  30
  31 /* Set Data Structure */
  32 #define SET_SIZE 5000
  33 typedef unsigned long ITEM_TYPE;
  34
  35 typedef struct {
  36         ITEM_TYPE val;
  37         int alloc_next, free_next;
  38 } list_item_t;
  39
  40 typedef struct {
  41         int alloc;
  42         int free;
  43         int trace;
  44         list_item_t list[SET_SIZE];
  45 } set_t;
  46
  47 set_t *via_setInit(void);
  48 int via_setAdd(set_t * set, ITEM_TYPE item);
  49 int via_setDel(set_t * set, ITEM_TYPE item);
  50 int via_setFirst(set_t * set, ITEM_TYPE * item);
  51 int via_setNext(set_t * set, ITEM_TYPE * item);
  52 int via_setDestroy(set_t * set);
  53
  54 #endif
  55
  56 #ifndef MM_INC
  57 #define MM_INC
  58
  59 struct mem_block_t {
  60         struct mem_block_t *next;
  61         struct mem_block_t *heap;
  62         int ofs, size;
  63         int align;
  64         unsigned int free:1;
  65         unsigned int reserved:1;
  66 };
  67 typedef struct mem_block_t TMemBlock;
  68 typedef struct mem_block_t *PMemBlock;
  69
  70 /* a heap is just the first block in a chain */
  71 typedef struct mem_block_t memHeap_t;
  72
  73 static __inline__ int mmBlockSize(PMemBlock b)
  74 {
  75         return b->size;
  76 }
  77
  78 static __inline__ int mmOffset(PMemBlock b)
  79 {
  80         return b->ofs;
  81 }
  82
  83 static __inline__ void mmMarkReserved(PMemBlock b)
  84 {
  85         b->reserved = 1;
  86 }
  87
  88 /*
  89  * input: total size in bytes
  90  * return: a heap pointer if OK, NULL if error
  91  */
  92 memHeap_t *via_mmInit(int ofs, int size);
  93
  94 PMemBlock via_mmAllocMem(memHeap_t * heap, int size, int align2,
  95                          int startSearch);
  96
  97 /*
  98  * Free block starts at offset
  99  * input: pointer to a block
 100  * return: 0 if OK, -1 if error
 101  */
 102 int via_mmFreeMem(PMemBlock b);
 103
 104 #endif