1 /************************************************************************** 2 * 3 * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 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. 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 NON-INFRINGEMENT. IN NO EVENT SHALL 21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 24 * USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 /* 28 * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> 29 */ 30 31 #ifndef _TTM_PLACEMENT_H_ 32 #define _TTM_PLACEMENT_H_ 33 34 #include <linux/types.h> 35 36 /* 37 * Memory regions for data placement. 38 */ 39 40 #define TTM_PL_SYSTEM 0 41 #define TTM_PL_TT 1 42 #define TTM_PL_VRAM 2 43 #define TTM_PL_PRIV 3 44 45 #define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM) 46 #define TTM_PL_FLAG_TT (1 << TTM_PL_TT) 47 #define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM) 48 #define TTM_PL_FLAG_PRIV (1 << TTM_PL_PRIV) 49 #define TTM_PL_MASK_MEM 0x0000FFFF 50 51 /* 52 * Other flags that affects data placement. 53 * TTM_PL_FLAG_CACHED indicates cache-coherent mappings 54 * if available. 55 * TTM_PL_FLAG_SHARED means that another application may 56 * reference the buffer. 57 * TTM_PL_FLAG_NO_EVICT means that the buffer may never 58 * be evicted to make room for other buffers. 59 * TTM_PL_FLAG_TOPDOWN requests to be placed from the 60 * top of the memory area, instead of the bottom. 61 */ 62 63 #define TTM_PL_FLAG_CACHED (1 << 16) 64 #define TTM_PL_FLAG_UNCACHED (1 << 17) 65 #define TTM_PL_FLAG_WC (1 << 18) 66 #define TTM_PL_FLAG_NO_EVICT (1 << 21) 67 #define TTM_PL_FLAG_TOPDOWN (1 << 22) 68 69 #define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \ 70 TTM_PL_FLAG_UNCACHED | \ 71 TTM_PL_FLAG_WC) 72 73 #define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING) 74 75 /** 76 * struct ttm_place 77 * 78 * @fpfn: first valid page frame number to put the object 79 * @lpfn: last valid page frame number to put the object 80 * @flags: memory domain and caching flags for the object 81 * 82 * Structure indicating a possible place to put an object. 83 */ 84 struct ttm_place { 85 unsigned fpfn; 86 unsigned lpfn; 87 uint32_t flags; 88 }; 89 90 /** 91 * struct ttm_placement 92 * 93 * @num_placement: number of preferred placements 94 * @placement: preferred placements 95 * @num_busy_placement: number of preferred placements when need to evict buffer 96 * @busy_placement: preferred placements when need to evict buffer 97 * 98 * Structure indicating the placement you request for an object. 99 */ 100 struct ttm_placement { 101 unsigned num_placement; 102 const struct ttm_place *placement; 103 unsigned num_busy_placement; 104 const struct ttm_place *busy_placement; 105 }; 106 107 #endif 108