2 * Copyright 2018 Advanced Micro Devices, Inc.
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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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
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24 #include "gfxhub_v1_1.h"
26 #include "gc/gc_9_2_1_offset.h"
27 #include "gc/gc_9_2_1_sh_mask.h"
29 #include "soc15_common.h"
31 int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
33 u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
35 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
36 u32 max_num_physical_nodes = 0;
37 u32 max_physical_node_id = 0;
39 switch (adev->asic_type) {
41 max_num_physical_nodes = 4;
42 max_physical_node_id = 3;
45 max_num_physical_nodes = 8;
46 max_physical_node_id = 7;
52 /* PF_MAX_REGION=0 means xgmi is disabled */
54 adev->gmc.xgmi.num_physical_nodes = max_region + 1;
55 if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
58 adev->gmc.xgmi.physical_node_id =
59 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION);
60 if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
62 adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
63 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
64 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;