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
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
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 
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 (adev->ip_versions[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 
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