86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2008 VMware, Inc.
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* Copyright 2015 Advanced Micro Devices, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef PB_CACHE_H
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#define PB_CACHE_H
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#include "pb_buffer.h"
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#include "util/simple_mtx.h"
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#include "util/list.h"
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#include "os/os_thread.h"
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/**
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* Statically inserted into the driver-specific buffer structure.
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*/
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struct pb_cache_entry
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{
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struct list_head head;
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struct pb_buffer *buffer; /**< Pointer to the structure this is part of. */
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struct pb_cache *mgr;
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int64_t start, end; /**< Caching time interval */
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unsigned bucket_index;
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};
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struct pb_cache
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{
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/* The cache is divided into buckets for minimizing cache misses.
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* The driver controls which buffer goes into which bucket.
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*/
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struct list_head *buckets;
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simple_mtx_t mutex;
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void *winsys;
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uint64_t cache_size;
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uint64_t max_cache_size;
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unsigned num_heaps;
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unsigned usecs;
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unsigned num_buffers;
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unsigned bypass_usage;
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float size_factor;
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void (*destroy_buffer)(void *winsys, struct pb_buffer *buf);
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bool (*can_reclaim)(void *winsys, struct pb_buffer *buf);
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};
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void pb_cache_add_buffer(struct pb_cache_entry *entry);
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struct pb_buffer *pb_cache_reclaim_buffer(struct pb_cache *mgr, pb_size size,
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unsigned alignment, unsigned usage,
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unsigned bucket_index);
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void pb_cache_release_all_buffers(struct pb_cache *mgr);
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void pb_cache_init_entry(struct pb_cache *mgr, struct pb_cache_entry *entry,
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struct pb_buffer *buf, unsigned bucket_index);
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void pb_cache_init(struct pb_cache *mgr, uint num_heaps,
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uint usecs, float size_factor,
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unsigned bypass_usage, uint64_t maximum_cache_size,
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void *winsys,
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void (*destroy_buffer)(void *winsys, struct pb_buffer *buf),
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bool (*can_reclaim)(void *winsys, struct pb_buffer *buf));
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void pb_cache_deinit(struct pb_cache *mgr);
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#endif
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