include/drm/ttm/ttm_placement.h

   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
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  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
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  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 /*
  46  * TTM_PL_FLAG_TOPDOWN requests to be placed from the
  47  * top of the memory area, instead of the bottom.
  48  */
  49
  50 #define TTM_PL_FLAG_CONTIGUOUS  (1 << 19)
  51 #define TTM_PL_FLAG_TOPDOWN     (1 << 22)
  52
  53 /**
  54  * struct ttm_place
  55  *
  56  * @fpfn:       first valid page frame number to put the object
  57  * @lpfn:       last valid page frame number to put the object
  58  * @flags:      memory domain and caching flags for the object
  59  *
  60  * Structure indicating a possible place to put an object.
  61  */
  62 struct ttm_place {
  63         unsigned        fpfn;
  64         unsigned        lpfn;
  65         uint32_t        mem_type;
  66         uint32_t        flags;
  67 };
  68
  69 /**
  70  * struct ttm_placement
  71  *
  72  * @num_placement:      number of preferred placements
  73  * @placement:          preferred placements
  74  * @num_busy_placement: number of preferred placements when need to evict buffer
  75  * @busy_placement:     preferred placements when need to evict buffer
  76  *
  77  * Structure indicating the placement you request for an object.
  78  */
  79 struct ttm_placement {
  80         unsigned                num_placement;
  81         const struct ttm_place  *placement;
  82         unsigned                num_busy_placement;
  83         const struct ttm_place  *busy_placement;
  84 };
  85
  86 #endif