1 /*
2  * Copyright 2012 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 "radeon.h"
25 #include "trinityd.h"
26 #include "trinity_dpm.h"
27 #include "ppsmc.h"
28 
29 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
30 {
31 	int i;
32 	u32 v = 0;
33 
34 	WREG32(SMC_MESSAGE_0, id);
35 	for (i = 0; i < rdev->usec_timeout; i++) {
36 		if (RREG32(SMC_RESP_0) != 0)
37 			break;
38 		udelay(1);
39 	}
40 	v = RREG32(SMC_RESP_0);
41 
42 	if (v != 1) {
43 		if (v == 0xFF) {
44 			DRM_ERROR("SMC failed to handle the message!\n");
45 			return -EINVAL;
46 		} else if (v == 0xFE) {
47 			DRM_ERROR("Unknown SMC message!\n");
48 			return -EINVAL;
49 		}
50 	}
51 
52 	return 0;
53 }
54 
55 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
56 {
57 	if (enable)
58 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
59 	else
60 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
61 }
62 
63 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
64 {
65 	if (enable)
66 		WREG32_SMC(SMU_SCRATCH0, 1);
67 	else
68 		WREG32_SMC(SMU_SCRATCH0, 0);
69 
70 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
71 }
72 
73 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
74 {
75 	WREG32_SMC(SMU_SCRATCH0, n);
76 
77 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
78 }
79 
80 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
81 {
82 	WREG32_SMC(SMU_SCRATCH0, n);
83 
84 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
85 }
86 
87 int trinity_uvd_dpm_config(struct radeon_device *rdev)
88 {
89 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
90 }
91 
92 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
93 {
94 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
95 }
96 
97 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
98 					  bool enable)
99 {
100 	if (enable)
101 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
102 	else
103 		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
104 }
105 
106 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
107 {
108 	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
109 }
110 
111 void trinity_acquire_mutex(struct radeon_device *rdev)
112 {
113 	int i;
114 
115 	WREG32(SMC_INT_REQ, 1);
116 	for (i = 0; i < rdev->usec_timeout; i++) {
117 		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
118 			break;
119 		udelay(1);
120 	}
121 }
122 
123 void trinity_release_mutex(struct radeon_device *rdev)
124 {
125 	WREG32(SMC_INT_REQ, 0);
126 }
127