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

/*
 * Copyright 2016 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef __AMDGPU_XGMI_H__
#define __AMDGPU_XGMI_H__

#include <drm/task_barrier.h>
#include "amdgpu_psp.h"
#include "amdgpu_ras.h"

struct amdgpu_hive_info {
	struct kobject kobj;
	uint64_t hive_id;
	struct list_head device_list;
	struct list_head node;
	atomic_t number_devices;
	struct mutex hive_lock;
	int hi_req_count;
	struct amdgpu_device *hi_req_gpu;
	struct task_barrier tb;
	enum {
		AMDGPU_XGMI_PSTATE_MIN,
		AMDGPU_XGMI_PSTATE_MAX_VEGA20,
		AMDGPU_XGMI_PSTATE_UNKNOWN
	} pstate;

	struct amdgpu_reset_domain *reset_domain;
};

struct amdgpu_pcs_ras_field {
	const char *err_name;
	uint32_t pcs_err_mask;
	uint32_t pcs_err_shift;
};

extern struct amdgpu_xgmi_ras  xgmi_ras;
struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev);
void amdgpu_put_xgmi_hive(struct amdgpu_hive_info *hive);
int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
int amdgpu_xgmi_remove_device(struct amdgpu_device *adev);
int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate);
int amdgpu_xgmi_get_hops_count(struct amdgpu_device *adev,
		struct amdgpu_device *peer_adev);
int amdgpu_xgmi_get_num_links(struct amdgpu_device *adev,
		struct amdgpu_device *peer_adev);
uint64_t amdgpu_xgmi_get_relative_phy_addr(struct amdgpu_device *adev,
					   uint64_t addr);
static inline bool amdgpu_xgmi_same_hive(struct amdgpu_device *adev,
		struct amdgpu_device *bo_adev)
{
	return (adev != bo_adev &&
		adev->gmc.xgmi.hive_id &&
		adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id);
}

#endif