1 /*
2  * Copyright 2017 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 "vega12_thermal.h"
25 #include "vega12_hwmgr.h"
26 #include "vega12_smumgr.h"
27 #include "vega12_ppsmc.h"
28 #include "vega12_inc.h"
29 #include "soc15_common.h"
30 #include "pp_debug.h"
31 
32 static int vega12_get_current_rpm(struct pp_hwmgr *hwmgr, uint32_t *current_rpm)
33 {
34 	PP_ASSERT_WITH_CODE(!smum_send_msg_to_smc(hwmgr,
35 				PPSMC_MSG_GetCurrentRpm,
36 				current_rpm),
37 			"Attempt to get current RPM from SMC Failed!",
38 			return -EINVAL);
39 
40 	return 0;
41 }
42 
43 int vega12_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
44 		struct phm_fan_speed_info *fan_speed_info)
45 {
46 	memset(fan_speed_info, 0, sizeof(*fan_speed_info));
47 	fan_speed_info->supports_percent_read = false;
48 	fan_speed_info->supports_percent_write = false;
49 	fan_speed_info->supports_rpm_read = true;
50 	fan_speed_info->supports_rpm_write = true;
51 
52 	return 0;
53 }
54 
55 int vega12_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t *speed)
56 {
57 	*speed = 0;
58 
59 	return vega12_get_current_rpm(hwmgr, speed);
60 }
61 
62 /**
63  * vega12_enable_fan_control_feature -Enables the SMC Fan Control Feature.
64  *
65  * @hwmgr: the address of the powerplay hardware manager.
66  * Return:   0 on success. -1 otherwise.
67  */
68 static int vega12_enable_fan_control_feature(struct pp_hwmgr *hwmgr)
69 {
70 #if 0
71 	struct vega12_hwmgr *data = (struct vega12_hwmgr *)(hwmgr->backend);
72 
73 	if (data->smu_features[GNLD_FAN_CONTROL].supported) {
74 		PP_ASSERT_WITH_CODE(!vega12_enable_smc_features(
75 				hwmgr, true,
76 				data->smu_features[GNLD_FAN_CONTROL].
77 				smu_feature_bitmap),
78 				"Attempt to Enable FAN CONTROL feature Failed!",
79 				return -1);
80 		data->smu_features[GNLD_FAN_CONTROL].enabled = true;
81 	}
82 #endif
83 	return 0;
84 }
85 
86 static int vega12_disable_fan_control_feature(struct pp_hwmgr *hwmgr)
87 {
88 #if 0
89 	struct vega12_hwmgr *data = (struct vega12_hwmgr *)(hwmgr->backend);
90 
91 	if (data->smu_features[GNLD_FAN_CONTROL].supported) {
92 		PP_ASSERT_WITH_CODE(!vega12_enable_smc_features(
93 				hwmgr, false,
94 				data->smu_features[GNLD_FAN_CONTROL].
95 				smu_feature_bitmap),
96 				"Attempt to Enable FAN CONTROL feature Failed!",
97 				return -1);
98 		data->smu_features[GNLD_FAN_CONTROL].enabled = false;
99 	}
100 #endif
101 	return 0;
102 }
103 
104 int vega12_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
105 {
106 	struct vega12_hwmgr *data = (struct vega12_hwmgr *)(hwmgr->backend);
107 
108 	if (data->smu_features[GNLD_FAN_CONTROL].supported)
109 		PP_ASSERT_WITH_CODE(
110 				!vega12_enable_fan_control_feature(hwmgr),
111 				"Attempt to Enable SMC FAN CONTROL Feature Failed!",
112 				return -1);
113 
114 	return 0;
115 }
116 
117 
118 int vega12_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
119 {
120 	struct vega12_hwmgr *data = (struct vega12_hwmgr *)(hwmgr->backend);
121 
122 	if (data->smu_features[GNLD_FAN_CONTROL].supported)
123 		PP_ASSERT_WITH_CODE(!vega12_disable_fan_control_feature(hwmgr),
124 				"Attempt to Disable SMC FAN CONTROL Feature Failed!",
125 				return -1);
126 
127 	return 0;
128 }
129 
130 /**
131  * vega12_fan_ctrl_reset_fan_speed_to_default - Reset Fan Speed to default.
132  * @hwmgr:  the address of the powerplay hardware manager.
133  * Exception Always succeeds.
134  */
135 int vega12_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
136 {
137 	return vega12_fan_ctrl_start_smc_fan_control(hwmgr);
138 }
139 
140 /**
141  * vega12_thermal_get_temperature - Reads the remote temperature from the SIslands thermal controller.
142  *
143  * @hwmgr: The address of the hardware manager.
144  */
145 int vega12_thermal_get_temperature(struct pp_hwmgr *hwmgr)
146 {
147 	struct amdgpu_device *adev = hwmgr->adev;
148 	int temp = 0;
149 
150 	temp = RREG32_SOC15(THM, 0, mmCG_MULT_THERMAL_STATUS);
151 
152 	temp = (temp & CG_MULT_THERMAL_STATUS__CTF_TEMP_MASK) >>
153 			CG_MULT_THERMAL_STATUS__CTF_TEMP__SHIFT;
154 
155 	temp = temp & 0x1ff;
156 
157 	temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
158 	return temp;
159 }
160 
161 /**
162  * vega12_thermal_set_temperature_range - Set the requested temperature range
163  *                                        for high and low alert signals
164  *
165  * @hwmgr: The address of the hardware manager.
166  * @range: Temperature range to be programmed for
167  *           high and low alert signals
168  * Exception: PP_Result_BadInput if the input data is not valid.
169  */
170 static int vega12_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
171 		struct PP_TemperatureRange *range)
172 {
173 	struct phm_ppt_v3_information *pptable_information =
174 		(struct phm_ppt_v3_information *)hwmgr->pptable;
175 	struct amdgpu_device *adev = hwmgr->adev;
176 	int low = VEGA12_THERMAL_MINIMUM_ALERT_TEMP;
177 	int high = VEGA12_THERMAL_MAXIMUM_ALERT_TEMP;
178 	uint32_t val;
179 
180 	/* compare them in unit celsius degree */
181 	if (low < range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)
182 		low = range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
183 	if (high > pptable_information->us_software_shutdown_temp)
184 		high = pptable_information->us_software_shutdown_temp;
185 
186 	if (low > high)
187 		return -EINVAL;
188 
189 	val = RREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_CTRL);
190 
191 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, MAX_IH_CREDIT, 5);
192 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, THERM_IH_HW_ENA, 1);
193 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, high);
194 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, low);
195 	val = val & (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK);
196 
197 	WREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_CTRL, val);
198 
199 	return 0;
200 }
201 
202 /**
203  * vega12_thermal_enable_alert - Enable thermal alerts on the RV770 thermal controller.
204  *
205  * @hwmgr: The address of the hardware manager.
206  */
207 static int vega12_thermal_enable_alert(struct pp_hwmgr *hwmgr)
208 {
209 	struct amdgpu_device *adev = hwmgr->adev;
210 	uint32_t val = 0;
211 
212 	val |= (1 << THM_THERMAL_INT_ENA__THERM_INTH_CLR__SHIFT);
213 	val |= (1 << THM_THERMAL_INT_ENA__THERM_INTL_CLR__SHIFT);
214 	val |= (1 << THM_THERMAL_INT_ENA__THERM_TRIGGER_CLR__SHIFT);
215 
216 	WREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_ENA, val);
217 
218 	return 0;
219 }
220 
221 /**
222  * vega12_thermal_disable_alert - Disable thermal alerts on the RV770 thermal controller.
223  * @hwmgr: The address of the hardware manager.
224  */
225 int vega12_thermal_disable_alert(struct pp_hwmgr *hwmgr)
226 {
227 	struct amdgpu_device *adev = hwmgr->adev;
228 
229 	WREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_ENA, 0);
230 
231 	return 0;
232 }
233 
234 /**
235  * vega12_thermal_stop_thermal_controller - Uninitialize the thermal controller.
236  * Currently just disables alerts.
237  * @hwmgr: The address of the hardware manager.
238  */
239 int vega12_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
240 {
241 	int result = vega12_thermal_disable_alert(hwmgr);
242 
243 	return result;
244 }
245 
246 /**
247  * vega12_thermal_setup_fan_table - Set up the fan table to control the fan using the SMC.
248  * @hwmgr:  the address of the powerplay hardware manager.
249  */
250 static int vega12_thermal_setup_fan_table(struct pp_hwmgr *hwmgr)
251 {
252 	int ret;
253 	struct vega12_hwmgr *data = (struct vega12_hwmgr *)(hwmgr->backend);
254 	PPTable_t *table = &(data->smc_state_table.pp_table);
255 
256 	ret = smum_send_msg_to_smc_with_parameter(hwmgr,
257 				PPSMC_MSG_SetFanTemperatureTarget,
258 				(uint32_t)table->FanTargetTemperature,
259 				NULL);
260 
261 	return ret;
262 }
263 
264 /**
265  * vega12_thermal_start_smc_fan_control - Start the fan control on the SMC.
266  * @hwmgr:  the address of the powerplay hardware manager.
267  * Return:  result from set temperature range routine
268  */
269 static int vega12_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
270 {
271 	/* If the fantable setup has failed we could have disabled
272 	 * PHM_PlatformCaps_MicrocodeFanControl even after
273 	 * this function was included in the table.
274 	 * Make sure that we still think controlling the fan is OK.
275 	 */
276 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
277 		vega12_fan_ctrl_start_smc_fan_control(hwmgr);
278 
279 	return 0;
280 }
281 
282 
283 int vega12_start_thermal_controller(struct pp_hwmgr *hwmgr,
284 				struct PP_TemperatureRange *range)
285 {
286 	int ret = 0;
287 
288 	if (range == NULL)
289 		return -EINVAL;
290 
291 	ret = vega12_thermal_set_temperature_range(hwmgr, range);
292 	if (ret)
293 		return -EINVAL;
294 
295 	vega12_thermal_enable_alert(hwmgr);
296 	/* We should restrict performance levels to low before we halt the SMC.
297 	 * On the other hand we are still in boot state when we do this
298 	 * so it would be pointless.
299 	 * If this assumption changes we have to revisit this table.
300 	 */
301 	ret = vega12_thermal_setup_fan_table(hwmgr);
302 	if (ret)
303 		return -EINVAL;
304 
305 	vega12_thermal_start_smc_fan_control(hwmgr);
306 
307 	return 0;
308 };
309