drivers/gpu/drm/nouveau/nvkm/subdev/therm/g84.c

   1 /*
   2  * Copyright 2012 Red Hat 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  * Authors: Ben Skeggs
  23  *          Martin Peres
  24  */
  25 #include "priv.h"
  26
  27 #include <subdev/fuse.h>
  28
  29 int
  30 g84_temp_get(struct nvkm_therm *therm)
  31 {
  32         struct nvkm_device *device = therm->subdev.device;
  33         struct nvkm_fuse *fuse = nvkm_fuse(therm);
  34
  35         if (fuse->func->read(fuse, 0x1a8) == 1)
  36                 return nvkm_rd32(device, 0x20400);
  37         else
  38                 return -ENODEV;
  39 }
  40
  41 void
  42 g84_sensor_setup(struct nvkm_therm *therm)
  43 {
  44         struct nvkm_device *device = therm->subdev.device;
  45         struct nvkm_fuse *fuse = nvkm_fuse(therm);
  46
  47         /* enable temperature reading for cards with insane defaults */
  48         if (fuse->func->read(fuse, 0x1a8) == 1) {
  49                 nvkm_mask(device, 0x20008, 0x80008000, 0x80000000);
  50                 nvkm_mask(device, 0x2000c, 0x80000003, 0x00000000);
  51                 mdelay(20); /* wait for the temperature to stabilize */
  52         }
  53 }
  54
  55 static void
  56 g84_therm_program_alarms(struct nvkm_therm *obj)
  57 {
  58         struct nvkm_therm_priv *therm = container_of(obj, typeof(*therm), base);
  59         struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
  60         struct nvkm_subdev *subdev = &therm->base.subdev;
  61         struct nvkm_device *device = subdev->device;
  62         unsigned long flags;
  63
  64         spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
  65
  66         /* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */
  67         nvkm_wr32(device, 0x20000, 0x000003ff);
  68
  69         /* shutdown: The computer should be shutdown when reached */
  70         nvkm_wr32(device, 0x20484, sensor->thrs_shutdown.hysteresis);
  71         nvkm_wr32(device, 0x20480, sensor->thrs_shutdown.temp);
  72
  73         /* THRS_1 : fan boost*/
  74         nvkm_wr32(device, 0x204c4, sensor->thrs_fan_boost.temp);
  75
  76         /* THRS_2 : critical */
  77         nvkm_wr32(device, 0x204c0, sensor->thrs_critical.temp);
  78
  79         /* THRS_4 : down clock */
  80         nvkm_wr32(device, 0x20414, sensor->thrs_down_clock.temp);
  81         spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
  82
  83         nvkm_debug(subdev,
  84                    "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
  85                    sensor->thrs_fan_boost.temp,
  86                    sensor->thrs_fan_boost.hysteresis,
  87                    sensor->thrs_down_clock.temp,
  88                    sensor->thrs_down_clock.hysteresis,
  89                    sensor->thrs_critical.temp,
  90                    sensor->thrs_critical.hysteresis,
  91                    sensor->thrs_shutdown.temp,
  92                    sensor->thrs_shutdown.hysteresis);
  93
  94 }
  95
  96 /* must be called with alarm_program_lock taken ! */
  97 static void
  98 g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm,
  99                                    uint32_t thrs_reg, u8 status_bit,
 100                                    const struct nvbios_therm_threshold *thrs,
 101                                    enum nvkm_therm_thrs thrs_name)
 102 {
 103         struct nvkm_device *device = therm->subdev.device;
 104         enum nvkm_therm_thrs_direction direction;
 105         enum nvkm_therm_thrs_state prev_state, new_state;
 106         int temp, cur;
 107
 108         prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
 109         temp = nvkm_rd32(device, thrs_reg);
 110
 111         /* program the next threshold */
 112         if (temp == thrs->temp) {
 113                 nvkm_wr32(device, thrs_reg, thrs->temp - thrs->hysteresis);
 114                 new_state = NVKM_THERM_THRS_HIGHER;
 115         } else {
 116                 nvkm_wr32(device, thrs_reg, thrs->temp);
 117                 new_state = NVKM_THERM_THRS_LOWER;
 118         }
 119
 120         /* fix the state (in case someone reprogrammed the alarms) */
 121         cur = therm->temp_get(therm);
 122         if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp)
 123                 new_state = NVKM_THERM_THRS_HIGHER;
 124         else if (new_state == NVKM_THERM_THRS_HIGHER &&
 125                 cur < thrs->temp - thrs->hysteresis)
 126                 new_state = NVKM_THERM_THRS_LOWER;
 127         nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
 128
 129         /* find the direction */
 130         if (prev_state < new_state)
 131                 direction = NVKM_THERM_THRS_RISING;
 132         else if (prev_state > new_state)
 133                 direction = NVKM_THERM_THRS_FALLING;
 134         else
 135                 return;
 136
 137         /* advertise a change in direction */
 138         nvkm_therm_sensor_event(therm, thrs_name, direction);
 139 }
 140
 141 static void
 142 g84_therm_intr(struct nvkm_subdev *subdev)
 143 {
 144         struct nvkm_therm_priv *therm = (void *)subdev;
 145         struct nvkm_device *device = therm->base.subdev.device;
 146         struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
 147         unsigned long flags;
 148         uint32_t intr;
 149
 150         spin_lock_irqsave(&therm->sensor.alarm_program_lock, flags);
 151
 152         intr = nvkm_rd32(device, 0x20100) & 0x3ff;
 153
 154         /* THRS_4: downclock */
 155         if (intr & 0x002) {
 156                 g84_therm_threshold_hyst_emulation(&therm->base, 0x20414, 24,
 157                                                    &sensor->thrs_down_clock,
 158                                                    NVKM_THERM_THRS_DOWNCLOCK);
 159                 intr &= ~0x002;
 160         }
 161
 162         /* shutdown */
 163         if (intr & 0x004) {
 164                 g84_therm_threshold_hyst_emulation(&therm->base, 0x20480, 20,
 165                                                    &sensor->thrs_shutdown,
 166                                                    NVKM_THERM_THRS_SHUTDOWN);
 167                 intr &= ~0x004;
 168         }
 169
 170         /* THRS_1 : fan boost */
 171         if (intr & 0x008) {
 172                 g84_therm_threshold_hyst_emulation(&therm->base, 0x204c4, 21,
 173                                                    &sensor->thrs_fan_boost,
 174                                                    NVKM_THERM_THRS_FANBOOST);
 175                 intr &= ~0x008;
 176         }
 177
 178         /* THRS_2 : critical */
 179         if (intr & 0x010) {
 180                 g84_therm_threshold_hyst_emulation(&therm->base, 0x204c0, 22,
 181                                                    &sensor->thrs_critical,
 182                                                    NVKM_THERM_THRS_CRITICAL);
 183                 intr &= ~0x010;
 184         }
 185
 186         if (intr)
 187                 nvkm_error(subdev, "intr %08x\n", intr);
 188
 189         /* ACK everything */
 190         nvkm_wr32(device, 0x20100, 0xffffffff);
 191         nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
 192
 193         spin_unlock_irqrestore(&therm->sensor.alarm_program_lock, flags);
 194 }
 195
 196 static int
 197 g84_therm_init(struct nvkm_object *object)
 198 {
 199         struct nvkm_therm_priv *therm = (void *)object;
 200         int ret;
 201
 202         ret = nvkm_therm_init(&therm->base);
 203         if (ret)
 204                 return ret;
 205
 206         g84_sensor_setup(&therm->base);
 207         return 0;
 208 }
 209
 210 static int
 211 g84_therm_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
 212                struct nvkm_oclass *oclass, void *data, u32 size,
 213                struct nvkm_object **pobject)
 214 {
 215         struct nvkm_therm_priv *therm;
 216         int ret;
 217
 218         ret = nvkm_therm_create(parent, engine, oclass, &therm);
 219         *pobject = nv_object(therm);
 220         if (ret)
 221                 return ret;
 222
 223         therm->base.pwm_ctrl = nv50_fan_pwm_ctrl;
 224         therm->base.pwm_get = nv50_fan_pwm_get;
 225         therm->base.pwm_set = nv50_fan_pwm_set;
 226         therm->base.pwm_clock = nv50_fan_pwm_clock;
 227         therm->base.temp_get = g84_temp_get;
 228         therm->sensor.program_alarms = g84_therm_program_alarms;
 229         nv_subdev(therm)->intr = g84_therm_intr;
 230
 231         /* init the thresholds */
 232         nvkm_therm_sensor_set_threshold_state(&therm->base,
 233                                               NVKM_THERM_THRS_SHUTDOWN,
 234                                               NVKM_THERM_THRS_LOWER);
 235         nvkm_therm_sensor_set_threshold_state(&therm->base,
 236                                               NVKM_THERM_THRS_FANBOOST,
 237                                               NVKM_THERM_THRS_LOWER);
 238         nvkm_therm_sensor_set_threshold_state(&therm->base,
 239                                               NVKM_THERM_THRS_CRITICAL,
 240                                               NVKM_THERM_THRS_LOWER);
 241         nvkm_therm_sensor_set_threshold_state(&therm->base,
 242                                               NVKM_THERM_THRS_DOWNCLOCK,
 243                                               NVKM_THERM_THRS_LOWER);
 244
 245         return nvkm_therm_preinit(&therm->base);
 246 }
 247
 248 int
 249 g84_therm_fini(struct nvkm_object *object, bool suspend)
 250 {
 251         struct nvkm_therm *therm = (void *)object;
 252         struct nvkm_device *device = therm->subdev.device;
 253
 254         /* Disable PTherm IRQs */
 255         nvkm_wr32(device, 0x20000, 0x00000000);
 256
 257         /* ACK all PTherm IRQs */
 258         nvkm_wr32(device, 0x20100, 0xffffffff);
 259         nvkm_wr32(device, 0x1100, 0x10000); /* PBUS */
 260
 261         return _nvkm_therm_fini(object, suspend);
 262 }
 263
 264 struct nvkm_oclass
 265 g84_therm_oclass = {
 266         .handle = NV_SUBDEV(THERM, 0x84),
 267         .ofuncs = &(struct nvkm_ofuncs) {
 268                 .ctor = g84_therm_ctor,
 269                 .dtor = _nvkm_therm_dtor,
 270                 .init = g84_therm_init,
 271                 .fini = g84_therm_fini,
 272         },
 273 };