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

   1 /*
   2  * Copyright 2016 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 #ifndef __AMDGPU_XGMI_H__
  23 #define __AMDGPU_XGMI_H__
  24
  25 #include <drm/task_barrier.h>
  26 #include "amdgpu_psp.h"
  27
  28 struct amdgpu_hive_info {
  29         uint64_t                hive_id;
  30         struct list_head        device_list;
  31         int number_devices;
  32         struct mutex hive_lock, reset_lock;
  33         struct kobject *kobj;
  34         struct device_attribute dev_attr;
  35         struct amdgpu_device *adev;
  36         int pstate; /*0 -- low , 1 -- high , -1 unknown*/
  37         struct task_barrier tb;
  38 };
  39
  40 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock);
  41 int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
  42 int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
  43 void amdgpu_xgmi_remove_device(struct amdgpu_device *adev);
  44 int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate);
  45 int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev,
  46                 struct amdgpu_device *peer_adev);
  47 int amdgpu_xgmi_ras_late_init(struct amdgpu_device *adev);
  48 void amdgpu_xgmi_ras_fini(struct amdgpu_device *adev);
  49
  50 static inline bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev,
  51                 struct amdgpu_device *bo_adev)
  52 {
  53         return (adev != bo_adev &&
  54                 adev->gmc.xgmi.hive_id &&
  55                 adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id);
  56 }
  57
  58 #endif