54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/*
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* Copyright 2018 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "amdgpu.h"
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#include "gfxhub_v1_1.h"
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#include "gc/gc_9_2_1_offset.h"
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#include "gc/gc_9_2_1_sh_mask.h"
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#include "soc15_common.h"
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int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
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{
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u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
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u32 max_region =
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REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
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/* PF_MAX_REGION=0 means xgmi is disabled */
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if (max_region) {
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adev->gmc.xgmi.num_physical_nodes = max_region + 1;
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if (adev->gmc.xgmi.num_physical_nodes > 4)
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return -EINVAL;
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adev->gmc.xgmi.physical_node_id =
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REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION);
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if (adev->gmc.xgmi.physical_node_id > 3)
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return -EINVAL;
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adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
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RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
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MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
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}
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return 0;
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}
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