1/*	$NetBSD: amdgpu_gfxhub_v1_1.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $	*/
2
3/*
4 * Copyright 2018 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 */
25#include <sys/cdefs.h>
26__KERNEL_RCSID(0, "$NetBSD: amdgpu_gfxhub_v1_1.c,v 1.2 2021/12/18 23:44:58 riastradh Exp $");
27
28#include "amdgpu.h"
29#include "gfxhub_v1_1.h"
30
31#include "gc/gc_9_2_1_offset.h"
32#include "gc/gc_9_2_1_sh_mask.h"
33
34#include "soc15_common.h"
35
36int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
37{
38	u32 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
39	u32 max_region =
40		REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
41	u32 max_num_physical_nodes   = 0;
42	u32 max_physical_node_id     = 0;
43
44	switch (adev->asic_type) {
45	case CHIP_VEGA20:
46		max_num_physical_nodes   = 4;
47		max_physical_node_id     = 3;
48		break;
49	case CHIP_ARCTURUS:
50		max_num_physical_nodes   = 8;
51		max_physical_node_id     = 7;
52		break;
53	default:
54		return -EINVAL;
55	}
56
57	/* PF_MAX_REGION=0 means xgmi is disabled */
58	if (max_region) {
59		adev->gmc.xgmi.num_physical_nodes = max_region + 1;
60		if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
61			return -EINVAL;
62
63		adev->gmc.xgmi.physical_node_id =
64			REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_LFB_REGION);
65		if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
66			return -EINVAL;
67		adev->gmc.xgmi.node_segment_size = REG_GET_FIELD(
68			RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
69			MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
70	}
71
72	return 0;
73}
74