drivers/video/tegra/nvmap/nvmap_mru.h

   1 /*
   2  * drivers/video/tegra/nvmap_mru.c
   3  *
   4  * IOVMM virtualization support for nvmap
   5  *
   6  * Copyright (c) 2009-2010, NVIDIA Corporation.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21  */
  22
  23
  24 #ifndef __VIDEO_TEGRA_NVMAP_MRU_H
  25 #define __VIDEO_TEGRA_NVMAP_MRU_H
  26
  27 #include <linux/spinlock.h>
  28
  29 #include "nvmap.h"
  30
  31 struct tegra_iovmm_area;
  32 struct tegra_iovmm_client;
  33
  34 #ifdef CONFIG_NVMAP_RECLAIM_UNPINNED_VM
  35
  36 static inline void nvmap_mru_lock(struct nvmap_share *share)
  37 {
  38         spin_lock(&share->mru_lock);
  39 }
  40
  41 static inline void nvmap_mru_unlock(struct nvmap_share *share)
  42 {
  43         spin_unlock(&share->mru_lock);
  44 }
  45
  46 int nvmap_mru_init(struct nvmap_share *share);
  47
  48 void nvmap_mru_destroy(struct nvmap_share *share);
  49
  50 size_t nvmap_mru_vm_size(struct tegra_iovmm_client *iovmm);
  51
  52 void nvmap_mru_insert_locked(struct nvmap_share *share, struct nvmap_handle *h);
  53
  54 void nvmap_mru_remove(struct nvmap_share *s, struct nvmap_handle *h);
  55
  56 struct tegra_iovmm_area *nvmap_handle_iovmm(struct nvmap_client *c,
  57                                             struct nvmap_handle *h);
  58
  59 #else
  60
  61 #define nvmap_mru_lock(_s)      do { } while (0)
  62 #define nvmap_mru_unlock(_s)    do { } while (0)
  63 #define nvmap_mru_init(_s)      0
  64 #define nvmap_mru_destroy(_s)   do { } while (0)
  65 #define nvmap_mru_vm_size(_a)   tegra_iovmm_get_vm_size(_a)
  66
  67 static inline void nvmap_mru_insert_locked(struct nvmap_share *share,
  68                                            struct nvmap_handle *h)
  69 { }
  70
  71 static inline void nvmap_mru_remove(struct nvmap_share *s,
  72                                     struct nvmap_handle *h)
  73 { }
  74
  75 static inline struct tegra_iovmm_area *nvmap_handle_iovmm(struct nvmap_client *c,
  76                                                           struct nvmap_handle *h)
  77 {
  78         BUG_ON(!h->pgalloc.area);
  79         return h->pgalloc.area;
  80 }
  81
  82 #endif
  83
  84 #endif