1 /*
2 * Copyright 2019 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_v2_0.h"
26
27 #include "athub/athub_2_0_0_offset.h"
28 #include "athub/athub_2_0_0_sh_mask.h"
29 #include "athub/athub_2_0_0_default.h"
30
31 #include "soc15_common.h"
32
33 static void
athub_v2_0_update_medium_grain_clock_gating(struct amdgpu_device * adev,bool enable)34 athub_v2_0_update_medium_grain_clock_gating(struct amdgpu_device *adev,
35 bool enable)
36 {
37 uint32_t def, data;
38
39 if (!(adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
40 return;
41
42 def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
43
44 if (enable)
45 data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
46 else
47 data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
48
49 if (def != data)
50 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
51 }
52
53 static void
athub_v2_0_update_medium_grain_light_sleep(struct amdgpu_device * adev,bool enable)54 athub_v2_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
55 bool enable)
56 {
57 uint32_t def, data;
58
59 if (!((adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
60 (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS)))
61 return;
62
63 def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
64
65 if (enable)
66 data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
67 else
68 data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
69
70 if (def != data)
71 WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
72 }
73
athub_v2_0_set_clockgating(struct amdgpu_device * adev,enum amd_clockgating_state state)74 int athub_v2_0_set_clockgating(struct amdgpu_device *adev,
75 enum amd_clockgating_state state)
76 {
77 if (amdgpu_sriov_vf(adev))
78 return 0;
79
80 switch (amdgpu_ip_version(adev, ATHUB_HWIP, 0)) {
81 case IP_VERSION(1, 3, 1):
82 case IP_VERSION(2, 0, 0):
83 case IP_VERSION(2, 0, 2):
84 athub_v2_0_update_medium_grain_clock_gating(adev,
85 state == AMD_CG_STATE_GATE);
86 athub_v2_0_update_medium_grain_light_sleep(adev,
87 state == AMD_CG_STATE_GATE);
88 break;
89 default:
90 break;
91 }
92
93 return 0;
94 }
95
athub_v2_0_get_clockgating(struct amdgpu_device * adev,u64 * flags)96 void athub_v2_0_get_clockgating(struct amdgpu_device *adev, u64 *flags)
97 {
98 int data;
99
100 /* AMD_CG_SUPPORT_ATHUB_MGCG */
101 data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
102 if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
103 *flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
104
105 /* AMD_CG_SUPPORT_ATHUB_LS */
106 if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
107 *flags |= AMD_CG_SUPPORT_ATHUB_LS;
108 }
109