LXR linux/drivers/gpu/drm/amd/amdgpu/amdgpu

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