1 /************************************************************************** 2 * 3 * Copyright 2007-2008 VMware, Inc. 4 * Copyright 2015 Advanced Micro Devices, Inc. 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 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 29 #ifndef PB_CACHE_H 30 #define PB_CACHE_H 31 32 #include "pb_buffer.h" 33 #include "util/list.h" 34 #include "os/os_thread.h" 35 36 /** 37 * Statically inserted into the driver-specific buffer structure. 38 */ 39 struct pb_cache_entry 40 { 41 struct list_head head; 42 struct pb_buffer *buffer; /**< Pointer to the structure this is part of. */ 43 struct pb_cache *mgr; 44 int64_t start, end; /**< Caching time interval */ 45 unsigned bucket_index; 46 }; 47 48 struct pb_cache 49 { 50 /* The cache is divided into buckets for minimizing cache misses. 51 * The driver controls which buffer goes into which bucket. 52 */ 53 struct list_head buckets[4]; 54 55 pipe_mutex mutex; 56 uint64_t cache_size; 57 uint64_t max_cache_size; 58 unsigned usecs; 59 unsigned num_buffers; 60 unsigned bypass_usage; 61 float size_factor; 62 63 void (*destroy_buffer)(struct pb_buffer *buf); 64 bool (*can_reclaim)(struct pb_buffer *buf); 65 }; 66 67 void pb_cache_add_buffer(struct pb_cache_entry *entry); 68 struct pb_buffer *pb_cache_reclaim_buffer(struct pb_cache *mgr, pb_size size, 69 unsigned alignment, unsigned usage, 70 unsigned bucket_index); 71 void pb_cache_release_all_buffers(struct pb_cache *mgr); 72 void pb_cache_init_entry(struct pb_cache *mgr, struct pb_cache_entry *entry, 73 struct pb_buffer *buf, unsigned bucket_index); 74 void pb_cache_init(struct pb_cache *mgr, uint usecs, float size_factor, 75 unsigned bypass_usage, uint64_t maximum_cache_size, 76 void (*destroy_buffer)(struct pb_buffer *buf), 77 bool (*can_reclaim)(struct pb_buffer *buf)); 78 void pb_cache_deinit(struct pb_cache *mgr); 79 80 #endif 81