LXR linux/include/drm/ttm/ttm

   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/*
  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 */
  62struct 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 */
  79struct 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
  87