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 
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