1/*
2 * Copyright 2020 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 "smuio_v13_0.h"
25#include "smuio/smuio_13_0_2_offset.h"
26#include "smuio/smuio_13_0_2_sh_mask.h"
27
28#define SMUIO_MCM_CONFIG__HOST_GPU_XGMI_MASK 0x00000001L
29
30static u32 smuio_v13_0_get_rom_index_offset(struct amdgpu_device *adev)
31{
32 return SOC15_REG_OFFSET(SMUIO, 0, regROM_INDEX);
33}
34
35static u32 smuio_v13_0_get_rom_data_offset(struct amdgpu_device *adev)
36{
37 return SOC15_REG_OFFSET(SMUIO, 0, regROM_DATA);
38}
39
40static void smuio_v13_0_update_rom_clock_gating(struct amdgpu_device *adev, bool enable)
41{
42 u32 def, data;
43
44 /* enable/disable ROM CG is not supported on APU */
45 if (adev->flags & AMD_IS_APU)
46 return;
47
48 def = data = RREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0);
49
50 if (enable && (adev->cg_flags & AMD_CG_SUPPORT_ROM_MGCG))
51 data &= ~(CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
52 CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK);
53 else
54 data |= CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK |
55 CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE1_MASK;
56
57 if (def != data)
58 WREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0, data);
59}
60
61static void smuio_v13_0_get_clock_gating_state(struct amdgpu_device *adev, u64 *flags)
62{
63 u32 data;
64
65 /* CGTT_ROM_CLK_CTRL0 is not available for APU */
66 if (adev->flags & AMD_IS_APU)
67 return;
68
69 data = RREG32_SOC15(SMUIO, 0, regCGTT_ROM_CLK_CTRL0);
70 if (!(data & CGTT_ROM_CLK_CTRL0__SOFT_OVERRIDE0_MASK))
71 *flags |= AMD_CG_SUPPORT_ROM_MGCG;
72}
73
74/**
75 * smuio_v13_0_get_die_id - query die id from FCH.
76 *
77 * @adev: amdgpu device pointer
78 *
79 * Returns die id
80 */
81static u32 smuio_v13_0_get_die_id(struct amdgpu_device *adev)
82{
83 u32 data, die_id;
84
85 data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
86 die_id = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, DIE_ID);
87
88 return die_id;
89}
90
91/**
92 * smuio_v13_0_get_socket_id - query socket id from FCH
93 *
94 * @adev: amdgpu device pointer
95 *
96 * Returns socket id
97 */
98static u32 smuio_v13_0_get_socket_id(struct amdgpu_device *adev)
99{
100 u32 data, socket_id;
101
102 data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
103 socket_id = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, SOCKET_ID);
104
105 return socket_id;
106}
107
108/**
109 * smuio_v13_0_is_host_gpu_xgmi_supported - detect xgmi interface between cpu and gpu/s.
110 *
111 * @adev: amdgpu device pointer
112 *
113 * Returns true on success or false otherwise.
114 */
115static bool smuio_v13_0_is_host_gpu_xgmi_supported(struct amdgpu_device *adev)
116{
117 u32 data;
118
119 data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
120 data = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, TOPOLOGY_ID);
121 /* data[4:0]
122 * bit 0 == 0 host-gpu interface is PCIE
123 * bit 0 == 1 host-gpu interface is Alternate Protocal
124 * for AMD, this is XGMI
125 */
126 data &= SMUIO_MCM_CONFIG__HOST_GPU_XGMI_MASK;
127
128 return data ? true : false;
129}
130
131static enum amdgpu_pkg_type smuio_v13_0_get_pkg_type(struct amdgpu_device *adev)
132{
133 enum amdgpu_pkg_type pkg_type;
134 u32 data;
135
136 data = RREG32_SOC15(SMUIO, 0, regSMUIO_MCM_CONFIG);
137 data = REG_GET_FIELD(data, SMUIO_MCM_CONFIG, TOPOLOGY_ID);
138
139 switch (data) {
140 case 0x4:
141 case 0xC:
142 pkg_type = AMDGPU_PKG_TYPE_CEM;
143 break;
144 default:
145 pkg_type = AMDGPU_PKG_TYPE_OAM;
146 break;
147 }
148
149 return pkg_type;
150}
151
152const struct amdgpu_smuio_funcs smuio_v13_0_funcs = {
153 .get_rom_index_offset = smuio_v13_0_get_rom_index_offset,
154 .get_rom_data_offset = smuio_v13_0_get_rom_data_offset,
155 .get_die_id = smuio_v13_0_get_die_id,
156 .get_socket_id = smuio_v13_0_get_socket_id,
157 .is_host_gpu_xgmi_supported = smuio_v13_0_is_host_gpu_xgmi_supported,
158 .update_rom_clock_gating = smuio_v13_0_update_rom_clock_gating,
159 .get_clock_gating_state = smuio_v13_0_get_clock_gating_state,
160 .get_pkg_type = smuio_v13_0_get_pkg_type,
161};
162

source code of linux/drivers/gpu/drm/amd/amdgpu/smuio_v13_0.c