1 /*
2  * Copyright 2016 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 <asm/div64.h>
25 #include "smu7_thermal.h"
26 #include "smu7_hwmgr.h"
27 #include "smu7_common.h"
28 
29 int smu7_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
30 		struct phm_fan_speed_info *fan_speed_info)
31 {
32 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
33 		return -ENODEV;
34 
35 	fan_speed_info->supports_percent_read = true;
36 	fan_speed_info->supports_percent_write = true;
37 	fan_speed_info->min_percent = 0;
38 	fan_speed_info->max_percent = 100;
39 
40 	if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM) &&
41 	    hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution) {
42 		fan_speed_info->supports_rpm_read = true;
43 		fan_speed_info->supports_rpm_write = true;
44 		fan_speed_info->min_rpm = hwmgr->thermal_controller.fanInfo.ulMinRPM;
45 		fan_speed_info->max_rpm = hwmgr->thermal_controller.fanInfo.ulMaxRPM;
46 	} else {
47 		fan_speed_info->min_rpm = 0;
48 		fan_speed_info->max_rpm = 0;
49 	}
50 
51 	return 0;
52 }
53 
54 int smu7_fan_ctrl_get_fan_speed_pwm(struct pp_hwmgr *hwmgr,
55 		uint32_t *speed)
56 {
57 	uint32_t duty100;
58 	uint32_t duty;
59 	uint64_t tmp64;
60 
61 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
62 		return -ENODEV;
63 
64 	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
65 			CG_FDO_CTRL1, FMAX_DUTY100);
66 	duty = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
67 			CG_THERMAL_STATUS, FDO_PWM_DUTY);
68 
69 	if (duty100 == 0)
70 		return -EINVAL;
71 
72 
73 	tmp64 = (uint64_t)duty * 255;
74 	do_div(tmp64, duty100);
75 	*speed = MIN((uint32_t)tmp64, 255);
76 
77 	return 0;
78 }
79 
80 int smu7_fan_ctrl_get_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t *speed)
81 {
82 	uint32_t tach_period;
83 	uint32_t crystal_clock_freq;
84 
85 	if (hwmgr->thermal_controller.fanInfo.bNoFan ||
86 	    !hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
87 		return -ENODEV;
88 
89 	tach_period = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
90 			CG_TACH_STATUS, TACH_PERIOD);
91 
92 	if (tach_period == 0)
93 		return -EINVAL;
94 
95 	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);
96 
97 	*speed = 60 * crystal_clock_freq * 10000 / tach_period;
98 
99 	return 0;
100 }
101 
102 /**
103  * smu7_fan_ctrl_set_static_mode - Set Fan Speed Control to static mode, so that the user can decide what speed to use.
104  * @hwmgr:  the address of the powerplay hardware manager.
105  * @mode:   the fan control mode, 0 default, 1 by percent, 5, by RPM
106  * Exception: Should always succeed.
107  */
108 int smu7_fan_ctrl_set_static_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
109 {
110 	if (hwmgr->fan_ctrl_is_in_default_mode) {
111 		hwmgr->fan_ctrl_default_mode =
112 				PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
113 						CG_FDO_CTRL2, FDO_PWM_MODE);
114 		hwmgr->tmin =
115 				PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
116 						CG_FDO_CTRL2, TMIN);
117 		hwmgr->fan_ctrl_is_in_default_mode = false;
118 	}
119 
120 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
121 			CG_FDO_CTRL2, TMIN, 0);
122 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
123 			CG_FDO_CTRL2, FDO_PWM_MODE, mode);
124 
125 	return 0;
126 }
127 
128 /**
129  * smu7_fan_ctrl_set_default_mode - Reset Fan Speed Control to default mode.
130  * @hwmgr:  the address of the powerplay hardware manager.
131  * Exception: Should always succeed.
132  */
133 int smu7_fan_ctrl_set_default_mode(struct pp_hwmgr *hwmgr)
134 {
135 	if (!hwmgr->fan_ctrl_is_in_default_mode) {
136 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
137 				CG_FDO_CTRL2, FDO_PWM_MODE, hwmgr->fan_ctrl_default_mode);
138 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
139 				CG_FDO_CTRL2, TMIN, hwmgr->tmin);
140 		hwmgr->fan_ctrl_is_in_default_mode = true;
141 	}
142 
143 	return 0;
144 }
145 
146 int smu7_fan_ctrl_start_smc_fan_control(struct pp_hwmgr *hwmgr)
147 {
148 	int result;
149 
150 	if (PP_CAP(PHM_PlatformCaps_ODFuzzyFanControlSupport)) {
151 		result = smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_StartFanControl,
152 					FAN_CONTROL_FUZZY, NULL);
153 
154 		if (PP_CAP(PHM_PlatformCaps_FanSpeedInTableIsRPM))
155 			hwmgr->hwmgr_func->set_max_fan_rpm_output(hwmgr,
156 					hwmgr->thermal_controller.
157 					advanceFanControlParameters.usMaxFanRPM);
158 		else
159 			hwmgr->hwmgr_func->set_max_fan_pwm_output(hwmgr,
160 					hwmgr->thermal_controller.
161 					advanceFanControlParameters.usMaxFanPWM);
162 
163 	} else {
164 		result = smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_StartFanControl,
165 					FAN_CONTROL_TABLE, NULL);
166 	}
167 
168 	if (!result && hwmgr->thermal_controller.
169 			advanceFanControlParameters.ucTargetTemperature)
170 		result = smum_send_msg_to_smc_with_parameter(hwmgr,
171 				PPSMC_MSG_SetFanTemperatureTarget,
172 				hwmgr->thermal_controller.
173 				advanceFanControlParameters.ucTargetTemperature,
174 				NULL);
175 
176 	if (!result &&
177 	    (hwmgr->chip_id == CHIP_POLARIS10 ||
178 	    hwmgr->chip_id == CHIP_POLARIS11 ||
179 	    hwmgr->chip_id == CHIP_POLARIS12) &&
180 	    hwmgr->thermal_controller.advanceFanControlParameters.ucEnableZeroRPM &&
181 	    !PP_CAP(PHM_PlatformCaps_customThermalManagement))
182 		result = smum_send_msg_to_smc(hwmgr,
183 				PPSMC_MSG_EnableZeroRpm,
184 				NULL);
185 
186 	hwmgr->fan_ctrl_enabled = true;
187 
188 	return result;
189 }
190 
191 
192 int smu7_fan_ctrl_stop_smc_fan_control(struct pp_hwmgr *hwmgr)
193 {
194 	hwmgr->fan_ctrl_enabled = false;
195 	return smum_send_msg_to_smc(hwmgr, PPSMC_StopFanControl, NULL);
196 }
197 
198 /**
199  * smu7_fan_ctrl_set_fan_speed_pwm - Set Fan Speed in PWM.
200  * @hwmgr: the address of the powerplay hardware manager.
201  * @speed: is the pwm value (0 - 255) to be set.
202  */
203 int smu7_fan_ctrl_set_fan_speed_pwm(struct pp_hwmgr *hwmgr,
204 		uint32_t speed)
205 {
206 	uint32_t duty100;
207 	uint32_t duty;
208 	uint64_t tmp64;
209 
210 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
211 		return 0;
212 
213 	speed = MIN(speed, 255);
214 
215 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
216 		smu7_fan_ctrl_stop_smc_fan_control(hwmgr);
217 
218 	duty100 = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
219 			CG_FDO_CTRL1, FMAX_DUTY100);
220 
221 	if (duty100 == 0)
222 		return -EINVAL;
223 
224 	tmp64 = (uint64_t)speed * duty100;
225 	do_div(tmp64, 255);
226 	duty = (uint32_t)tmp64;
227 
228 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
229 			CG_FDO_CTRL0, FDO_STATIC_DUTY, duty);
230 
231 	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
232 }
233 
234 /**
235 * smu7_fan_ctrl_reset_fan_speed_to_default - Reset Fan Speed to default.
236 * @hwmgr:  the address of the powerplay hardware manager.
237 * Exception: Always succeeds.
238 */
239 int smu7_fan_ctrl_reset_fan_speed_to_default(struct pp_hwmgr *hwmgr)
240 {
241 	int result;
242 
243 	if (hwmgr->thermal_controller.fanInfo.bNoFan)
244 		return 0;
245 
246 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
247 		result = smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
248 		if (!result)
249 			result = smu7_fan_ctrl_start_smc_fan_control(hwmgr);
250 	} else
251 		result = smu7_fan_ctrl_set_default_mode(hwmgr);
252 
253 	return result;
254 }
255 
256 /**
257  * smu7_fan_ctrl_set_fan_speed_rpm - Set Fan Speed in RPM.
258  * @hwmgr: the address of the powerplay hardware manager.
259  * @speed: is the percentage value (min - max) to be set.
260  * Exception: Fails is the speed not lie between min and max.
261  */
262 int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
263 {
264 	uint32_t tach_period;
265 	uint32_t crystal_clock_freq;
266 
267 	if (hwmgr->thermal_controller.fanInfo.bNoFan ||
268 			(hwmgr->thermal_controller.fanInfo.
269 			ucTachometerPulsesPerRevolution == 0) ||
270 			speed == 0 ||
271 			(speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
272 			(speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
273 		return 0;
274 
275 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
276 		smu7_fan_ctrl_stop_smc_fan_control(hwmgr);
277 
278 	crystal_clock_freq = amdgpu_asic_get_xclk((struct amdgpu_device *)hwmgr->adev);
279 
280 	tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);
281 
282 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
283 				CG_TACH_CTRL, TARGET_PERIOD, tach_period);
284 
285 	return smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC_RPM);
286 }
287 
288 /**
289  * smu7_thermal_get_temperature - Reads the remote temperature from the SIslands thermal controller.
290  *
291  * @hwmgr: The address of the hardware manager.
292  */
293 int smu7_thermal_get_temperature(struct pp_hwmgr *hwmgr)
294 {
295 	int temp;
296 
297 	temp = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
298 			CG_MULT_THERMAL_STATUS, CTF_TEMP);
299 
300 	/* Bit 9 means the reading is lower than the lowest usable value. */
301 	if (temp & 0x200)
302 		temp = SMU7_THERMAL_MAXIMUM_TEMP_READING;
303 	else
304 		temp = temp & 0x1ff;
305 
306 	temp *= PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
307 
308 	return temp;
309 }
310 
311 /**
312  * smu7_thermal_set_temperature_range - Set the requested temperature range for high and low alert signals
313  *
314  * @hwmgr: The address of the hardware manager.
315  * @low_temp: Temperature to be programmed for high alert signals
316  * @high_temp: Temperature to be programmed for low alert signals
317  * Exception: PP_Result_BadInput if the input data is not valid.
318  */
319 static int smu7_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
320 		int low_temp, int high_temp)
321 {
322 	int low = SMU7_THERMAL_MINIMUM_ALERT_TEMP *
323 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
324 	int high = SMU7_THERMAL_MAXIMUM_ALERT_TEMP *
325 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
326 
327 	if (low < low_temp)
328 		low = low_temp;
329 	if (high > high_temp)
330 		high = high_temp;
331 
332 	if (low > high)
333 		return -EINVAL;
334 
335 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
336 			CG_THERMAL_INT, DIG_THERM_INTH,
337 			(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
338 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
339 			CG_THERMAL_INT, DIG_THERM_INTL,
340 			(low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
341 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
342 			CG_THERMAL_CTRL, DIG_THERM_DPM,
343 			(high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
344 
345 	return 0;
346 }
347 
348 /**
349  * smu7_thermal_initialize - Programs thermal controller one-time setting registers
350  *
351  * @hwmgr: The address of the hardware manager.
352  */
353 static int smu7_thermal_initialize(struct pp_hwmgr *hwmgr)
354 {
355 	if (hwmgr->thermal_controller.fanInfo.ucTachometerPulsesPerRevolution)
356 		PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
357 				CG_TACH_CTRL, EDGE_PER_REV,
358 				hwmgr->thermal_controller.fanInfo.
359 				ucTachometerPulsesPerRevolution - 1);
360 
361 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
362 			CG_FDO_CTRL2, TACH_PWM_RESP_RATE, 0x28);
363 
364 	return 0;
365 }
366 
367 /**
368  * smu7_thermal_enable_alert - Enable thermal alerts on the RV770 thermal controller.
369  *
370  * @hwmgr: The address of the hardware manager.
371  */
372 static void smu7_thermal_enable_alert(struct pp_hwmgr *hwmgr)
373 {
374 	uint32_t alert;
375 
376 	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
377 			CG_THERMAL_INT, THERM_INT_MASK);
378 	alert &= ~(SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
379 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
380 			CG_THERMAL_INT, THERM_INT_MASK, alert);
381 
382 	/* send message to SMU to enable internal thermal interrupts */
383 	smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Enable, NULL);
384 }
385 
386 /**
387  * smu7_thermal_disable_alert - Disable thermal alerts on the RV770 thermal controller.
388  * @hwmgr: The address of the hardware manager.
389  */
390 int smu7_thermal_disable_alert(struct pp_hwmgr *hwmgr)
391 {
392 	uint32_t alert;
393 
394 	alert = PHM_READ_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
395 			CG_THERMAL_INT, THERM_INT_MASK);
396 	alert |= (SMU7_THERMAL_HIGH_ALERT_MASK | SMU7_THERMAL_LOW_ALERT_MASK);
397 	PHM_WRITE_VFPF_INDIRECT_FIELD(hwmgr->device, CGS_IND_REG__SMC,
398 			CG_THERMAL_INT, THERM_INT_MASK, alert);
399 
400 	/* send message to SMU to disable internal thermal interrupts */
401 	return smum_send_msg_to_smc(hwmgr, PPSMC_MSG_Thermal_Cntl_Disable, NULL);
402 }
403 
404 /**
405  * smu7_thermal_stop_thermal_controller - Uninitialize the thermal controller.
406  * Currently just disables alerts.
407  * @hwmgr: The address of the hardware manager.
408  */
409 int smu7_thermal_stop_thermal_controller(struct pp_hwmgr *hwmgr)
410 {
411 	int result = smu7_thermal_disable_alert(hwmgr);
412 
413 	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
414 		smu7_fan_ctrl_set_default_mode(hwmgr);
415 
416 	return result;
417 }
418 
419 /**
420  * smu7_thermal_start_smc_fan_control - Start the fan control on the SMC.
421  * @hwmgr:  the address of the powerplay hardware manager.
422  * Return:   result from set temperature range routine
423  */
424 static int smu7_thermal_start_smc_fan_control(struct pp_hwmgr *hwmgr)
425 {
426 /* If the fantable setup has failed we could have disabled
427  * PHM_PlatformCaps_MicrocodeFanControl even after
428  * this function was included in the table.
429  * Make sure that we still think controlling the fan is OK.
430 */
431 	if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl)) {
432 		smu7_fan_ctrl_start_smc_fan_control(hwmgr);
433 		smu7_fan_ctrl_set_static_mode(hwmgr, FDO_PWM_MODE_STATIC);
434 	}
435 
436 	return 0;
437 }
438 
439 int smu7_start_thermal_controller(struct pp_hwmgr *hwmgr,
440 				struct PP_TemperatureRange *range)
441 {
442 	int ret = 0;
443 
444 	if (range == NULL)
445 		return -EINVAL;
446 
447 	smu7_thermal_initialize(hwmgr);
448 	ret = smu7_thermal_set_temperature_range(hwmgr, range->min, range->max);
449 	if (ret)
450 		return -EINVAL;
451 	smu7_thermal_enable_alert(hwmgr);
452 	ret = smum_thermal_avfs_enable(hwmgr);
453 	if (ret)
454 		return -EINVAL;
455 
456 /* We should restrict performance levels to low before we halt the SMC.
457  * On the other hand we are still in boot state when we do this
458  * so it would be pointless.
459  * If this assumption changes we have to revisit this table.
460  */
461 	smum_thermal_setup_fan_table(hwmgr);
462 	smu7_thermal_start_smc_fan_control(hwmgr);
463 	return 0;
464 }
465 
466 
467 
468 int smu7_thermal_ctrl_uninitialize_thermal_controller(struct pp_hwmgr *hwmgr)
469 {
470 	if (!hwmgr->thermal_controller.fanInfo.bNoFan)
471 		smu7_fan_ctrl_set_default_mode(hwmgr);
472 	return 0;
473 }
474 
475