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 	def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
40 
41 	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_MGCG))
42 		data |= ATHUB_MISC_CNTL__CG_ENABLE_MASK;
43 	else
44 		data &= ~ATHUB_MISC_CNTL__CG_ENABLE_MASK;
45 
46 	if (def != data)
47 		WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
48 }
49 
50 static void
51 athub_v2_0_update_medium_grain_light_sleep(struct amdgpu_device *adev,
52 					   bool enable)
53 {
54 	uint32_t def, data;
55 
56 	def = data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
57 
58 	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS) &&
59 	    (adev->cg_flags & AMD_CG_SUPPORT_HDP_LS))
60 		data |= ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
61 	else
62 		data &= ~ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK;
63 
64 	if (def != data)
65 		WREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL, data);
66 }
67 
68 int athub_v2_0_set_clockgating(struct amdgpu_device *adev,
69 			       enum amd_clockgating_state state)
70 {
71 	if (amdgpu_sriov_vf(adev))
72 		return 0;
73 
74 	switch (adev->asic_type) {
75 	case CHIP_NAVI10:
76 	case CHIP_NAVI14:
77 	case CHIP_NAVI12:
78 		athub_v2_0_update_medium_grain_clock_gating(adev,
79 				state == AMD_CG_STATE_GATE);
80 		athub_v2_0_update_medium_grain_light_sleep(adev,
81 				state == AMD_CG_STATE_GATE);
82 		break;
83 	default:
84 		break;
85 	}
86 
87 	return 0;
88 }
89 
90 void athub_v2_0_get_clockgating(struct amdgpu_device *adev, u32 *flags)
91 {
92 	int data;
93 
94 	/* AMD_CG_SUPPORT_ATHUB_MGCG */
95 	data = RREG32_SOC15(ATHUB, 0, mmATHUB_MISC_CNTL);
96 	if (data & ATHUB_MISC_CNTL__CG_ENABLE_MASK)
97 		*flags |= AMD_CG_SUPPORT_ATHUB_MGCG;
98 
99 	/* AMD_CG_SUPPORT_ATHUB_LS */
100 	if (data & ATHUB_MISC_CNTL__CG_MEM_LS_ENABLE_MASK)
101 		*flags |= AMD_CG_SUPPORT_ATHUB_LS;
102 }
103