src/gallium/auxiliary/pipebuffer/pb_bufmgr.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  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.
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  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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  27
  28 /**
  29  * \file
  30  * Buffer management.
  31  *
  32  * A buffer manager does only one basic thing: it creates buffers. Actually,
  33  * "buffer factory" would probably a more accurate description.
  34  *
  35  * You can chain buffer managers so that you can have a finer grained memory
  36  * management and pooling.
  37  *
  38  * For example, for a simple batch buffer manager you would chain:
  39  * - the native buffer manager, which provides DMA memory from the graphics
  40  * memory space;
  41  * - the pool buffer manager, which keep around a pool of equally sized buffers
  42  * to avoid latency associated with the native buffer manager;
  43  * - the fenced buffer manager, which will delay buffer destruction until the
  44  * the moment the card finishing processing it.
  45  *
  46  * \author Jose Fonseca <jrfonseca@tungstengraphics.com>
  47  */
  48
  49 #ifndef PB_BUFMGR_H_
  50 #define PB_BUFMGR_H_
  51
  52
  53 #include "pb_buffer.h"
  54
  55
  56 #ifdef __cplusplus
  57 extern "C" {
  58 #endif
  59
  60
  61 struct pb_desc;
  62
  63
  64 /**
  65  * Abstract base class for all buffer managers.
  66  */
  67 struct pb_manager
  68 {
  69    void
  70    (*destroy)( struct pb_manager *mgr );
  71
  72    struct pb_buffer *
  73    (*create_buffer)( struct pb_manager *mgr,
  74                      pb_size size,
  75                      const struct pb_desc *desc);
  76
  77    /**
  78     * Flush all temporary-held buffers.
  79     *
  80     * Used mostly to aid debugging memory issues or to clean up resources when
  81     * the drivers are long lived.
  82     */
  83    void
  84    (*flush)( struct pb_manager *mgr );
  85 };
  86
  87
  88 /**
  89  * Malloc buffer provider.
  90  *
  91  * Simple wrapper around pb_malloc_buffer_create for convenience.
  92  */
  93 struct pb_manager *
  94 pb_malloc_bufmgr_create(void);
  95
  96
  97 /**
  98  * Static buffer pool sub-allocator.
  99  *
 100  * Manages the allocation of equally sized buffers. It does so by allocating
 101  * a single big buffer and divide it equally sized buffers.
 102  *
 103  * It is meant to manage the allocation of batch buffer pools.
 104  */
 105 struct pb_manager *
 106 pool_bufmgr_create(struct pb_manager *provider,
 107                    pb_size n, pb_size size,
 108                    const struct pb_desc *desc);
 109
 110
 111 /**
 112  * Static sub-allocator based the old memory manager.
 113  *
 114  * It managers buffers of different sizes. It does so by allocating a buffer
 115  * with the size of the heap, and then using the old mm memory manager to manage
 116  * that heap.
 117  */
 118 struct pb_manager *
 119 mm_bufmgr_create(struct pb_manager *provider,
 120                  pb_size size, pb_size align2);
 121
 122 /**
 123  * Same as mm_bufmgr_create.
 124  *
 125  * Buffer will be release when the manager is destroyed.
 126  */
 127 struct pb_manager *
 128 mm_bufmgr_create_from_buffer(struct pb_buffer *buffer,
 129                              pb_size size, pb_size align2);
 130
 131
 132 /**
 133  * Slab sub-allocator.
 134  */
 135 struct pb_manager *
 136 pb_slab_manager_create(struct pb_manager *provider,
 137                        pb_size bufSize,
 138                        pb_size slabSize,
 139                        const struct pb_desc *desc);
 140
 141 /**
 142  * Allow a range of buffer size, by aggregating multiple slabs sub-allocators
 143  * with different bucket sizes.
 144  */
 145 struct pb_manager *
 146 pb_slab_range_manager_create(struct pb_manager *provider,
 147                              pb_size minBufSize,
 148                              pb_size maxBufSize,
 149                              pb_size slabSize,
 150                              const struct pb_desc *desc);
 151
 152
 153 /**
 154  * Time-based buffer cache.
 155  *
 156  * This manager keeps a cache of destroyed buffers during a time interval.
 157  */
 158 struct pb_manager *
 159 pb_cache_manager_create(struct pb_manager *provider,
 160                         unsigned usecs);
 161
 162
 163 struct pb_fence_ops;
 164
 165 /**
 166  * Fenced buffer manager.
 167  *
 168  * This manager is just meant for convenience. It wraps the buffers returned
 169  * by another manager in fenced buffers, so that
 170  *
 171  * NOTE: the buffer manager that provides the buffers will be destroyed
 172  * at the same time.
 173  */
 174 struct pb_manager *
 175 fenced_bufmgr_create(struct pb_manager *provider,
 176                      struct pb_fence_ops *ops,
 177                      pb_size max_buffer_size,
 178                      pb_size max_cpu_total_size);
 179
 180
 181 struct pb_manager *
 182 pb_alt_manager_create(struct pb_manager *provider1,
 183                       struct pb_manager *provider2);
 184
 185
 186 /**
 187  * Ondemand buffer manager.
 188  *
 189  * Buffers are created in malloc'ed memory (fast and cached), and the constents
 190  * is transfered to a buffer from the provider (typically in slow uncached
 191  * memory) when there is an attempt to validate the buffer.
 192  *
 193  * Ideal for situations where one does not know before hand whether a given
 194  * buffer will effectively be used by the hardware or not.
 195  */
 196 struct pb_manager *
 197 pb_ondemand_manager_create(struct pb_manager *provider);
 198
 199
 200 /**
 201  * Debug buffer manager to detect buffer under- and overflows.
 202  *
 203  * Under/overflow sizes should be a multiple of the largest alignment
 204  */
 205 struct pb_manager *
 206 pb_debug_manager_create(struct pb_manager *provider,
 207                         pb_size underflow_size, pb_size overflow_size);
 208
 209
 210 #ifdef __cplusplus
 211 }
 212 #endif
 213
 214 #endif /*PB_BUFMGR_H_*/