1 /*
2 * Copyright 2018 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
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:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
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
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 */
23 #include "amdgpu.h"
24 #include "gfxhub_v1_1.h"
25
26 #include "gc/gc_9_2_1_offset.h"
27 #include "gc/gc_9_2_1_sh_mask.h"
28
29 #include "soc15_common.h"
30
31 #define mmMC_VM_XGMI_LFB_CNTL_ALDE 0x0978
32 #define mmMC_VM_XGMI_LFB_CNTL_ALDE_BASE_IDX 0
33 #define mmMC_VM_XGMI_LFB_SIZE_ALDE 0x0979
34 #define mmMC_VM_XGMI_LFB_SIZE_ALDE_BASE_IDX 0
35 //MC_VM_XGMI_LFB_CNTL
36 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION__SHIFT 0x0
37 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION__SHIFT 0x4
38 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION_MASK 0x0000000FL
39 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION_MASK 0x000000F0L
40 //MC_VM_XGMI_LFB_SIZE
41 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE__SHIFT 0x0
42 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE_MASK 0x0001FFFFL
43
gfxhub_v1_1_get_xgmi_info(struct amdgpu_device * adev)44 int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
45 {
46 u32 max_num_physical_nodes;
47 u32 max_physical_node_id;
48 u32 xgmi_lfb_cntl;
49 u32 max_region;
50 u64 seg_size;
51
52 if (adev->asic_type == CHIP_ALDEBARAN) {
53 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL_ALDE);
54 seg_size = REG_GET_FIELD(
55 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE_ALDE),
56 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
57 } else {
58 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
59 seg_size = REG_GET_FIELD(
60 RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
61 MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
62 }
63
64 max_region =
65 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
66
67
68 switch (adev->asic_type) {
69 case CHIP_VEGA20:
70 max_num_physical_nodes = 4;
71 max_physical_node_id = 3;
72 break;
73 case CHIP_ARCTURUS:
74 max_num_physical_nodes = 8;
75 max_physical_node_id = 7;
76 break;
77 case CHIP_ALDEBARAN:
78 max_num_physical_nodes = 16;
79 max_physical_node_id = 15;
80 break;
81 default:
82 return -EINVAL;
83 }
84
85 /* PF_MAX_REGION=0 means xgmi is disabled */
86 if (max_region || adev->gmc.xgmi.connected_to_cpu) {
87 adev->gmc.xgmi.num_physical_nodes = max_region + 1;
88
89 if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
90 return -EINVAL;
91
92 adev->gmc.xgmi.physical_node_id =
93 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL,
94 PF_LFB_REGION);
95
96 if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
97 return -EINVAL;
98
99 adev->gmc.xgmi.node_segment_size = seg_size;
100 }
101
102 return 0;
103 }
104
