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 int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
32 {
33 	u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
34 	u32 max_region =
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;
38 
39 	switch (adev->asic_type) {
40 	case CHIP_VEGA20:
41 		max_num_physical_nodes   = 4;
42 		max_physical_node_id     = 3;
43 		break;
44 	case CHIP_ARCTURUS:
45 		max_num_physical_nodes   = 8;
46 		max_physical_node_id     = 7;
47 		break;
48 	default:
49 		return -EINVAL;
50 	}
51 
52 	/* PF_MAX_REGION=0 means xgmi is disabled */
53 	if (max_region) {
54 		adev->gmc.xgmi.num_physical_nodes = max_region + 1;
55 		if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
56 			return -EINVAL;
57 
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)
61 			return -EINVAL;
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;
65 	}
66 
67 	return 0;
68 }
69