drivers/char/drm/sis_ds.h

   1 /* sis_ds.h -- Private header for Direct Rendering Manager -*- linux-c -*-
   2  * Created: Mon Jan  4 10:05:05 1999 by sclin@sis.com.tw
   3  *
   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, sublicense,
  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 next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * PRECISION INSIGHT 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  * Authors:
  27  *    Sung-Ching Lin <sclin@sis.com.tw>
  28  *
  29  */
  30
  31 #ifndef __SIS_DS_H__
  32 #define __SIS_DS_H__
  33
  34 /* Set Data Structure */
  35
  36 #define SET_SIZE 5000
  37
  38 typedef unsigned int ITEM_TYPE;
  39
  40 typedef struct {
  41         ITEM_TYPE val;
  42         int alloc_next, free_next;
  43 } list_item_t;
  44
  45 typedef struct {
  46         int alloc;
  47         int free;
  48         int trace;
  49         list_item_t list[SET_SIZE];
  50 } set_t;
  51
  52 set_t *setInit(void);
  53 int setAdd(set_t * set, ITEM_TYPE item);
  54 int setDel(set_t * set, ITEM_TYPE item);
  55 int setFirst(set_t * set, ITEM_TYPE * item);
  56 int setNext(set_t * set, ITEM_TYPE * item);
  57 int setDestroy(set_t * set);
  58
  59 /*
  60  * GLX Hardware Device Driver common code
  61  * Copyright (C) 1999 Wittawat Yamwong
  62  *
  63  * Permission is hereby granted, free of charge, to any person obtaining a
  64  * copy of this software and associated documentation files (the "Software"),
  65  * to deal in the Software without restriction, including without limitation
  66  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  67  * and/or sell copies of the Software, and to permit persons to whom the
  68  * Software is furnished to do so, subject to the following conditions:
  69  *
  70  * The above copyright notice and this permission notice shall be included
  71  * in all copies or substantial portions of the Software.
  72  *
  73  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  74  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  75  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  76  * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
  77  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  78  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
  79  * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  80  *
  81  */
  82
  83 struct mem_block_t {
  84         struct mem_block_t *next;
  85         struct mem_block_t *heap;
  86         int ofs, size;
  87         int align;
  88         unsigned int free:1;
  89         unsigned int reserved:1;
  90 };
  91 typedef struct mem_block_t TMemBlock;
  92 typedef struct mem_block_t *PMemBlock;
  93
  94 /* a heap is just the first block in a chain */
  95 typedef struct mem_block_t memHeap_t;
  96
  97 static __inline__ int mmBlockSize(PMemBlock b)
  98 {
  99         return b->size;
 100 }
 101
 102 static __inline__ int mmOffset(PMemBlock b)
 103 {
 104         return b->ofs;
 105 }
 106
 107 static __inline__ void mmMarkReserved(PMemBlock b)
 108 {
 109         b->reserved = 1;
 110 }
 111
 112 /*
 113  * input: total size in bytes
 114  * return: a heap pointer if OK, NULL if error
 115  */
 116 memHeap_t *mmInit(int ofs, int size);
 117
 118 /*
 119  * Allocate 'size' bytes with 2^align2 bytes alignment,
 120  * restrict the search to free memory after 'startSearch'
 121  * depth and back buffers should be in different 4mb banks
 122  * to get better page hits if possible
 123  * input:       size = size of block
 124  *              align2 = 2^align2 bytes alignment
 125  *              startSearch = linear offset from start of heap to begin search
 126  * return: pointer to the allocated block, 0 if error
 127  */
 128 PMemBlock mmAllocMem(memHeap_t * heap, int size, int align2, int startSearch);
 129
 130 /*
 131  * Returns 1 if the block 'b' is part of the heap 'heap'
 132  */
 133 int mmBlockInHeap(PMemBlock heap, PMemBlock b);
 134
 135 /*
 136  * Free block starts at offset
 137  * input: pointer to a block
 138  * return: 0 if OK, -1 if error
 139  */
 140 int mmFreeMem(PMemBlock b);
 141
 142 /* For debuging purpose. */
 143 void mmDumpMemInfo(memHeap_t * mmInit);
 144
 145 #endif                          /* __SIS_DS_H__ */