drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h

   1 /*
   2  * Copyright 2017 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Christian König
  23  */
  24 #ifndef __AMDGPU_MN_H__
  25 #define __AMDGPU_MN_H__
  26
  27 /*
  28  * HMM mirror
  29  */
  30 struct amdgpu_mn;
  31 struct hmm_range;
  32
  33 enum amdgpu_mn_type {
  34         AMDGPU_MN_TYPE_GFX,
  35         AMDGPU_MN_TYPE_HSA,
  36 };
  37
  38 #if defined(CONFIG_HMM_MIRROR)
  39 void amdgpu_mn_lock(struct amdgpu_mn *mn);
  40 void amdgpu_mn_unlock(struct amdgpu_mn *mn);
  41 struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev,
  42                                 enum amdgpu_mn_type type);
  43 int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr);
  44 void amdgpu_mn_unregister(struct amdgpu_bo *bo);
  45 void amdgpu_hmm_init_range(struct hmm_range *range);
  46 #else
  47 static inline void amdgpu_mn_lock(struct amdgpu_mn *mn) {}
  48 static inline void amdgpu_mn_unlock(struct amdgpu_mn *mn) {}
  49 static inline struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev,
  50                                               enum amdgpu_mn_type type)
  51 {
  52         return NULL;
  53 }
  54 static inline int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr)
  55 {
  56         DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, "
  57                       "add CONFIG_ZONE_DEVICE=y in config file to fix this\n");
  58         return -ENODEV;
  59 }
  60 static inline void amdgpu_mn_unregister(struct amdgpu_bo *bo) {}
  61 #endif
  62
  63 #endif