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/*
* 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"
int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
{
u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
u32 max_region =
REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
/* PF_MAX_REGION=0 means xgmi is disabled */
if (max_region) {
adev->gmc.xgmi.num_physical_nodes = max_region + 1;
if (adev->gmc.xgmi.num_physical_nodes > 4)
return -EINVAL;
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 > 3)
return -EINVAL;
adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
}
return 0;
}
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