1/*
2 * Copyright 2021 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
24#include "amdgpu.h"
25#include "athub_v3_0.h"
26#include "athub/athub_3_0_0_offset.h"
27#include "athub/athub_3_0_0_sh_mask.h"
28#include "navi10_enum.h"
29#include "soc15_common.h"
30
31#define regATHUB_MISC_CNTL_V3_0_1 0x00d7
32#define regATHUB_MISC_CNTL_V3_0_1_BASE_IDX 0
33#define regATHUB_MISC_CNTL_V3_3_0 0x00d8
34#define regATHUB_MISC_CNTL_V3_3_0_BASE_IDX 0
35
36
37static uint32_t athub_v3_0_get_cg_cntl(struct amdgpu_device *adev)
38{
39 uint32_t data;
40
41 switch (amdgpu_ip_version(adev, ip: ATHUB_HWIP, inst: 0)) {
42 case IP_VERSION(3, 0, 1):
43 data = RREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL_V3_0_1);
44 break;
45 case IP_VERSION(3, 3, 0):
46 data = RREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL_V3_3_0);
47 break;
48 default:
49 data = RREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL);
50 break;
51 }
52 return data;
53}
54
55static void athub_v3_0_set_cg_cntl(struct amdgpu_device *adev, uint32_t data)
56{
57 switch (amdgpu_ip_version(adev, ip: ATHUB_HWIP, inst: 0)) {
58 case IP_VERSION(3, 0, 1):
59 WREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL_V3_0_1, data);
60 break;
61 case IP_VERSION(3, 3, 0):
62 WREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL_V3_3_0, data);
63 break;
64 default:
65 WREG32_SOC15(ATHUB, 0, regATHUB_MISC_CNTL, data);
66 break;
67 }
68}
69
70static void
71athub_v3_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
72 bool enable)
73{
74 uint32_t def, data;
75
76 def = data = athub_v3_0_get_cg_cntl(adev);
77
78 if (enable && (adev->cg_flags & AMD_CG_SUPPORT_ATHUB_MGCG))
79 data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
80 else
81 data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
82
83 if (def != data)
84 athub_v3_0_set_cg_cntl(adev, data);
85}
86
87static void
88athub_v3_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
89 bool enable)
90{
91 uint32_t def, data;
92
93 def = data = athub_v3_0_get_cg_cntl(adev);
94
95 if (enable && (adev->cg_flags & AMD_CG_SUPPORT_ATHUB_LS))
96 data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
97 else
98 data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
99
100 if (def != data)
101 athub_v3_0_set_cg_cntl(adev, data);
102}
103
104int athub_v3_0_set_clockgating(struct amdgpu_device *adev,
105 enum amd_clockgating_state state)
106{
107 if (amdgpu_sriov_vf(adev))
108 return 0;
109
110 switch (amdgpu_ip_version(adev, ip: ATHUB_HWIP, inst: 0)) {
111 case IP_VERSION(3, 0, 0):
112 case IP_VERSION(3, 0, 1):
113 case IP_VERSION(3, 0, 2):
114 case IP_VERSION(3, 3, 0):
115 athub_v3_0_update_medium_grain_clock_gating(adev,
116 enable: state == AMD_CG_STATE_GATE);
117 athub_v3_0_update_medium_grain_light_sleep(adev,
118 enable: state == AMD_CG_STATE_GATE);
119 break;
120 default:
121 break;
122 }
123
124 return 0;
125}
126
127void athub_v3_0_get_clockgating(struct amdgpu_device *adev, u64 *flags)
128{
129 int data;
130
131 /* AMD_CG_SUPPORT_ATHUB_MGCG */
132 data = athub_v3_0_get_cg_cntl(adev);
133 if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
134 *flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
135
136 /* AMD_CG_SUPPORT_ATHUB_LS */
137 if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
138 *flags |= AMD_CG_SUPPORT_ATHUB_LS;
139}
140

source code of linux/drivers/gpu/drm/amd/amdgpu/athub_v3_0.c