Edit File: ttm_placement.h
/************************************************************************** * * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ /* * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> */ #ifndef _TTM_PLACEMENT_H_ #define _TTM_PLACEMENT_H_ #include <linux/types.h> /* * Memory regions for data placement. */ #define TTM_PL_SYSTEM 0 #define TTM_PL_TT 1 #define TTM_PL_VRAM 2 #define TTM_PL_PRIV 3 #define TTM_PL_FLAG_SYSTEM (1 << TTM_PL_SYSTEM) #define TTM_PL_FLAG_TT (1 << TTM_PL_TT) #define TTM_PL_FLAG_VRAM (1 << TTM_PL_VRAM) #define TTM_PL_FLAG_PRIV (1 << TTM_PL_PRIV) #define TTM_PL_MASK_MEM 0x0000FFFF /* * Other flags that affects data placement. * TTM_PL_FLAG_CACHED indicates cache-coherent mappings * if available. * TTM_PL_FLAG_SHARED means that another application may * reference the buffer. * TTM_PL_FLAG_NO_EVICT means that the buffer may never * be evicted to make room for other buffers. * TTM_PL_FLAG_TOPDOWN requests to be placed from the * top of the memory area, instead of the bottom. */ #define TTM_PL_FLAG_CACHED (1 << 16) #define TTM_PL_FLAG_UNCACHED (1 << 17) #define TTM_PL_FLAG_WC (1 << 18) #define TTM_PL_FLAG_CONTIGUOUS (1 << 19) #define TTM_PL_FLAG_NO_EVICT (1 << 21) #define TTM_PL_FLAG_TOPDOWN (1 << 22) #define TTM_PL_MASK_CACHING (TTM_PL_FLAG_CACHED | \ TTM_PL_FLAG_UNCACHED | \ TTM_PL_FLAG_WC) #define TTM_PL_MASK_MEMTYPE (TTM_PL_MASK_MEM | TTM_PL_MASK_CACHING) /** * struct ttm_place * * @fpfn: first valid page frame number to put the object * @lpfn: last valid page frame number to put the object * @flags: memory domain and caching flags for the object * * Structure indicating a possible place to put an object. */ struct ttm_place { unsigned fpfn; unsigned lpfn; uint32_t flags; }; /** * struct ttm_placement * * @num_placement: number of preferred placements * @placement: preferred placements * @num_busy_placement: number of preferred placements when need to evict buffer * @busy_placement: preferred placements when need to evict buffer * * Structure indicating the placement you request for an object. */ struct ttm_placement { unsigned num_placement; const struct ttm_place *placement; unsigned num_busy_placement; const struct ttm_place *busy_placement; }; #endif