1 /* $NetBSD: nouveau_nvkm_subdev_therm_g84.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $ */ 2 3 /* 4 * Copyright 2012 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 * Martin Peres 26 */ 27 #include <sys/cdefs.h> 28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_therm_g84.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $"); 29 30 #include "priv.h" 31 32 #include <subdev/fuse.h> 33 34 int 35 g84_temp_get(struct nvkm_therm *therm) 36 { 37 struct nvkm_device *device = therm->subdev.device; 38 39 if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) 40 return nvkm_rd32(device, 0x20400); 41 else 42 return -ENODEV; 43 } 44 45 void 46 g84_sensor_setup(struct nvkm_therm *therm) 47 { 48 struct nvkm_device *device = therm->subdev.device; 49 50 /* enable temperature reading for cards with insane defaults */ 51 if (nvkm_fuse_read(device->fuse, 0x1a8) == 1) { 52 nvkm_mask(device, 0x20008, 0x80008000, 0x80000000); 53 nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000); 54 mdelay(20); /* wait for the temperature to stabilize */ 55 } 56 } 57 58 static void 59 g84_therm_program_alarms(struct nvkm_therm *therm) 60 { 61 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 62 struct nvkm_subdev *subdev = &therm->subdev; 63 struct nvkm_device *device = subdev->device; 64 unsigned long flags; 65 66 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 67 68 /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */ 69 nvkm_wr32(device, 0x20000, 0x000003ff); 70 71 /* shutdown: The computer should be shutdown when reached */ 72 nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis); 73 nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp); 74 75 /* THRS_1 : fan boost*/ 76 nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp); 77 78 /* THRS_2 : critical */ 79 nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp); 80 81 /* THRS_4 : down clock */ 82 nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp); 83 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 84 85 nvkm_debug(subdev, 86 "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n", 87 sensor->thrs_fan_boost.temp, 88 sensor->thrs_fan_boost.hysteresis, 89 sensor->thrs_down_clock.temp, 90 sensor->thrs_down_clock.hysteresis, 91 sensor->thrs_critical.temp, 92 sensor->thrs_critical.hysteresis, 93 sensor->thrs_shutdown.temp, 94 sensor->thrs_shutdown.hysteresis); 95 96 } 97 98 /* must be called with alarm_program_lock taken ! */ 99 static void 100 g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm, 101 uint32_t thrs_reg, u8 status_bit, 102 const struct nvbios_therm_threshold *thrs, 103 enum nvkm_therm_thrs thrs_name) 104 { 105 struct nvkm_device *device = therm->subdev.device; 106 enum nvkm_therm_thrs_direction direction; 107 enum nvkm_therm_thrs_state prev_state, new_state; 108 int temp, cur; 109 110 prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name); 111 temp = nvkm_rd32(device, thrs_reg); 112 113 /* program the next threshold */ 114 if (temp == thrs->temp) { 115 nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis); 116 new_state = NVKM_THERM_THRS_HIGHER; 117 } else { 118 nvkm_wr32(device, thrs_reg, thrs->temp); 119 new_state = NVKM_THERM_THRS_LOWER; 120 } 121 122 /* fix the state (in case someone reprogrammed the alarms) */ 123 cur = therm->func->temp_get(therm); 124 if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp) 125 new_state = NVKM_THERM_THRS_HIGHER; 126 else if (new_state == NVKM_THERM_THRS_HIGHER && 127 cur < thrs->temp - thrs->hysteresis) 128 new_state = NVKM_THERM_THRS_LOWER; 129 nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state); 130 131 /* find the direction */ 132 if (prev_state < new_state) 133 direction = NVKM_THERM_THRS_RISING; 134 else if (prev_state > new_state) 135 direction = NVKM_THERM_THRS_FALLING; 136 else 137 return; 138 139 /* advertise a change in direction */ 140 nvkm_therm_sensor_event(therm, thrs_name, direction); 141 } 142 143 static void 144 g84_therm_intr(struct nvkm_therm *therm) 145 { 146 struct nvkm_subdev *subdev = &therm->subdev; 147 struct nvkm_device *device = subdev->device; 148 struct nvbios_therm_sensor *sensor = &therm->bios_sensor; 149 unsigned long flags; 150 uint32_t intr; 151 152 spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags); 153 154 intr = nvkm_rd32(device, 0x20100) & 0x3ff; 155 156 /* THRS_4: downclock */ 157 if (intr & 0x002) { 158 g84_therm_threshold_hyst_emulation(therm, 0x20414, 24, 159 &sensor->thrs_down_clock, 160 NVKM_THERM_THRS_DOWNCLOCK); 161 intr &= ~0x002; 162 } 163 164 /* shutdown */ 165 if (intr & 0x004) { 166 g84_therm_threshold_hyst_emulation(therm, 0x20480, 20, 167 &sensor->thrs_shutdown, 168 NVKM_THERM_THRS_SHUTDOWN); 169 intr &= ~0x004; 170 } 171 172 /* THRS_1 : fan boost */ 173 if (intr & 0x008) { 174 g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21, 175 &sensor->thrs_fan_boost, 176 NVKM_THERM_THRS_FANBOOST); 177 intr &= ~0x008; 178 } 179 180 /* THRS_2 : critical */ 181 if (intr & 0x010) { 182 g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22, 183 &sensor->thrs_critical, 184 NVKM_THERM_THRS_CRITICAL); 185 intr &= ~0x010; 186 } 187 188 if (intr) 189 nvkm_error(subdev, "intr %08x\n", intr); 190 191 /* ACK everything */ 192 nvkm_wr32(device, 0x20100, 0xffffffff); 193 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 194 195 spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags); 196 } 197 198 void 199 g84_therm_fini(struct nvkm_therm *therm) 200 { 201 struct nvkm_device *device = therm->subdev.device; 202 203 /* Disable PTherm IRQs */ 204 nvkm_wr32(device, 0x20000, 0x00000000); 205 206 /* ACK all PTherm IRQs */ 207 nvkm_wr32(device, 0x20100, 0xffffffff); 208 nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */ 209 } 210 211 void 212 g84_therm_init(struct nvkm_therm *therm) 213 { 214 g84_sensor_setup(therm); 215 } 216 217 static const struct nvkm_therm_func 218 g84_therm = { 219 .init = g84_therm_init, 220 .fini = g84_therm_fini, 221 .intr = g84_therm_intr, 222 .pwm_ctrl = nv50_fan_pwm_ctrl, 223 .pwm_get = nv50_fan_pwm_get, 224 .pwm_set = nv50_fan_pwm_set, 225 .pwm_clock = nv50_fan_pwm_clock, 226 .temp_get = g84_temp_get, 227 .program_alarms = g84_therm_program_alarms, 228 }; 229 230 int 231 g84_therm_new(struct nvkm_device *device, int index, struct nvkm_therm **ptherm) 232 { 233 struct nvkm_therm *therm; 234 int ret; 235 236 ret = nvkm_therm_new_(&g84_therm, device, index, &therm); 237 *ptherm = therm; 238 if (ret) 239 return ret; 240 241 /* init the thresholds */ 242 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_SHUTDOWN, 243 NVKM_THERM_THRS_LOWER); 244 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_FANBOOST, 245 NVKM_THERM_THRS_LOWER); 246 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_CRITICAL, 247 NVKM_THERM_THRS_LOWER); 248 nvkm_therm_sensor_set_threshold_state(therm, NVKM_THERM_THRS_DOWNCLOCK, 249 NVKM_THERM_THRS_LOWER); 250 return 0; 251 } 252
Indexes created Mon Sep 22 10:09:38 GMT 2025