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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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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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 "pipe/p_compiler.h"
  54 #include "pipe/p_error.h"
  55
  56
  57 #ifdef __cplusplus
  58 extern "C" {
  59 #endif
  60
  61
  62 struct pb_desc;
  63 struct pipe_buffer;
  64
  65
  66 /**
  67  * Abstract base class for all buffer managers.
  68  */
  69 struct pb_manager
  70 {
  71    void
  72    (*destroy)( struct pb_manager *mgr );
  73
  74    struct pb_buffer *
  75    (*create_buffer)( struct pb_manager *mgr,
  76                      size_t size,
  77                      const struct pb_desc *desc);
  78
  79    /**
  80     * Flush all temporary-held buffers.
  81     *
  82     * Used mostly to aid debugging memory issues or to clean up resources when
  83     * the drivers are long lived.
  84     */
  85    void
  86    (*flush)( struct pb_manager *mgr );
  87 };
  88
  89
  90 /**
  91  * Malloc buffer provider.
  92  *
  93  * Simple wrapper around pb_malloc_buffer_create for convenience.
  94  */
  95 struct pb_manager *
  96 pb_malloc_bufmgr_create(void);
  97
  98
  99 /**
 100  * Static buffer pool sub-allocator.
 101  *
 102  * Manages the allocation of equally sized buffers. It does so by allocating
 103  * a single big buffer and divide it equally sized buffers.
 104  *
 105  * It is meant to manage the allocation of batch buffer pools.
 106  */
 107 struct pb_manager *
 108 pool_bufmgr_create(struct pb_manager *provider,
 109                    size_t n, size_t size,
 110                    const struct pb_desc *desc);
 111
 112
 113 /**
 114  * Static sub-allocator based the old memory manager.
 115  *
 116  * It managers buffers of different sizes. It does so by allocating a buffer
 117  * with the size of the heap, and then using the old mm memory manager to manage
 118  * that heap.
 119  */
 120 struct pb_manager *
 121 mm_bufmgr_create(struct pb_manager *provider,
 122                  size_t size, size_t align2);
 123
 124 /**
 125  * Same as mm_bufmgr_create.
 126  *
 127  * Buffer will be release when the manager is destroyed.
 128  */
 129 struct pb_manager *
 130 mm_bufmgr_create_from_buffer(struct pb_buffer *buffer,
 131                              size_t size, size_t align2);
 132
 133
 134 /**
 135  * Slab sub-allocator.
 136  */
 137 struct pb_manager *
 138 pb_slab_manager_create(struct pb_manager *provider,
 139                        size_t bufSize,
 140                        size_t slabSize,
 141                        const struct pb_desc *desc);
 142
 143 /**
 144  * Allow a range of buffer size, by aggregating multiple slabs sub-allocators
 145  * with different bucket sizes.
 146  */
 147 struct pb_manager *
 148 pb_slab_range_manager_create(struct pb_manager *provider,
 149                              size_t minBufSize,
 150                              size_t maxBufSize,
 151                              size_t slabSize,
 152                              const struct pb_desc *desc);
 153
 154
 155 /**
 156  * Time-based buffer cache.
 157  *
 158  * This manager keeps a cache of destroyed buffers during a time interval.
 159  */
 160 struct pb_manager *
 161 pb_cache_manager_create(struct pb_manager *provider,
 162                         unsigned usecs);
 163
 164
 165 struct pb_fence_ops;
 166
 167 /**
 168  * Fenced buffer manager.
 169  *
 170  * This manager is just meant for convenience. It wraps the buffers returned
 171  * by another manager in fenced buffers, so that
 172  *
 173  * NOTE: the buffer manager that provides the buffers will be destroyed
 174  * at the same time.
 175  */
 176 struct pb_manager *
 177 fenced_bufmgr_create(struct pb_manager *provider,
 178                      struct pb_fence_ops *ops);
 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  * Band size should be a multiple of the largest alignment
 204  */
 205 struct pb_manager *
 206 pb_debug_manager_create(struct pb_manager *provider, size_t band_size);
 207
 208
 209 #ifdef __cplusplus
 210 }
 211 #endif
 212
 213 #endif /*PB_BUFMGR_H_*/