/*
 * Copyright 2018 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.
 *
 */
#include "amdgpu.h"
#include "gfxhub_v1_1.h"

#include "gc/gc_9_2_1_offset.h"
#include "gc/gc_9_2_1_sh_mask.h"

#include "soc15_common.h"

#define mmMC_VM_XGMI_LFB_CNTL_ALDE                      0x0978
#define mmMC_VM_XGMI_LFB_CNTL_ALDE_BASE_IDX             0
#define mmMC_VM_XGMI_LFB_SIZE_ALDE                      0x0979
#define mmMC_VM_XGMI_LFB_SIZE_ALDE_BASE_IDX             0
//MC_VM_XGMI_LFB_CNTL
#define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION__SHIFT  0x0
#define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION__SHIFT  0x4
#define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION_MASK    0x0000000FL
#define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION_MASK    0x000000F0L
//MC_VM_XGMI_LFB_SIZE
#define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE__SHIFT    0x0
#define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE_MASK      0x0001FFFFL

int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
{
        u32 max_num_physical_nodes;
        u32 max_physical_node_id;
        u32 xgmi_lfb_cntl;
        u32 max_region;
        u64 seg_size;

        if (adev->asic_type == CHIP_ALDEBARAN) {
                xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL_ALDE);
                seg_size = REG_GET_FIELD(
                        RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE_ALDE),
                        MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
                max_region =
                        REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL_ALDE, PF_MAX_REGION);
        } else {
                xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
                seg_size = REG_GET_FIELD(
                        RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
                        MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
                max_region =
                        REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
        }



        switch (adev->asic_type) {
        case CHIP_VEGA20:
                max_num_physical_nodes   = 4;
                max_physical_node_id     = 3;
                break;
        case CHIP_ARCTURUS:
                max_num_physical_nodes   = 8;
                max_physical_node_id     = 7;
                break;
        case CHIP_ALDEBARAN:
                max_num_physical_nodes   = 16;
                max_physical_node_id     = 15;
                break;
        default:
                return -EINVAL;
        }

        /* PF_MAX_REGION=0 means xgmi is disabled */
        if (max_region || adev->gmc.xgmi.connected_to_cpu) {
                adev->gmc.xgmi.num_physical_nodes = max_region + 1;

                if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
                        return -EINVAL;

                if (adev->asic_type == CHIP_ALDEBARAN) {
                        adev->gmc.xgmi.physical_node_id =
                                REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL_ALDE,
                                                PF_LFB_REGION);
                } else {
                        adev->gmc.xgmi.physical_node_id =
                                REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL,
                                                PF_LFB_REGION);
                }

                if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
                        return -EINVAL;

                adev->gmc.xgmi.node_segment_size = seg_size;
        }

        return 0;
}