subdev/bios/therm.c

0001 /*
0002  * Copyright 2012 Nouveau Community
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Martin Peres
0023  */
0024 #include <subdev/bios.h>
0025 #include <subdev/bios/bit.h>
0026 #include <subdev/bios/therm.h>
0027
0028 static u32
0029 therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
0030 {
0031     struct bit_entry bit_P;
0032     u32 therm = 0;
0033
0034     if (!bit_entry(bios, 'P', &bit_P)) {
0035         if (bit_P.version == 1)
0036             therm = nvbios_rd32(bios, bit_P.offset + 12);
0037         else if (bit_P.version == 2)
0038             therm = nvbios_rd32(bios, bit_P.offset + 16);
0039         else
0040             nvkm_error(&bios->subdev,
0041                    "unknown offset for thermal in BIT P %d\n",
0042                    bit_P.version);
0043     }
0044
0045     /* exit now if we haven't found the thermal table */
0046     if (!therm)
0047         return 0;
0048
0049     *ver = nvbios_rd08(bios, therm + 0);
0050     *hdr = nvbios_rd08(bios, therm + 1);
0051     *len = nvbios_rd08(bios, therm + 2);
0052     *cnt = nvbios_rd08(bios, therm + 3);
0053     return therm + nvbios_rd08(bios, therm + 1);
0054 }
0055
0056 static u32
0057 nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
0058 {
0059     u8 hdr, cnt;
0060     u32 therm = therm_table(bios, ver, &hdr, len, &cnt);
0061     if (therm && idx < cnt)
0062         return therm + idx * *len;
0063     return 0;
0064 }
0065
0066 int
0067 nvbios_therm_sensor_parse(struct nvkm_bios *bios,
0068               enum nvbios_therm_domain domain,
0069               struct nvbios_therm_sensor *sensor)
0070 {
0071     s8 thrs_section, sensor_section, offset;
0072     u8 ver, len, i;
0073     u32 entry;
0074
0075     /* we only support the core domain for now */
0076     if (domain != NVBIOS_THERM_DOMAIN_CORE)
0077         return -EINVAL;
0078
0079     /* Read the entries from the table */
0080     thrs_section = 0;
0081     sensor_section = -1;
0082     i = 0;
0083     while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
0084         s16 value = nvbios_rd16(bios, entry + 1);
0085
0086         switch (nvbios_rd08(bios, entry + 0)) {
0087         case 0x0:
0088             thrs_section = value;
0089             if (value > 0)
0090                 return 0; /* we do not try to support ambient */
0091             break;
0092         case 0x01:
0093             sensor_section++;
0094             if (sensor_section == 0) {
0095                 offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2;
0096                 sensor->offset_constant = offset;
0097             }
0098             break;
0099
0100         case 0x04:
0101             if (thrs_section == 0) {
0102                 sensor->thrs_critical.temp = (value & 0xff0) >> 4;
0103                 sensor->thrs_critical.hysteresis = value & 0xf;
0104             }
0105             break;
0106
0107         case 0x07:
0108             if (thrs_section == 0) {
0109                 sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
0110                 sensor->thrs_down_clock.hysteresis = value & 0xf;
0111             }
0112             break;
0113
0114         case 0x08:
0115             if (thrs_section == 0) {
0116                 sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
0117                 sensor->thrs_fan_boost.hysteresis = value & 0xf;
0118             }
0119             break;
0120
0121         case 0x10:
0122             if (sensor_section == 0)
0123                 sensor->offset_num = value;
0124             break;
0125
0126         case 0x11:
0127             if (sensor_section == 0)
0128                 sensor->offset_den = value;
0129             break;
0130
0131         case 0x12:
0132             if (sensor_section == 0)
0133                 sensor->slope_mult = value;
0134             break;
0135
0136         case 0x13:
0137             if (sensor_section == 0)
0138                 sensor->slope_div = value;
0139             break;
0140         case 0x32:
0141             if (thrs_section == 0) {
0142                 sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
0143                 sensor->thrs_shutdown.hysteresis = value & 0xf;
0144             }
0145             break;
0146         }
0147     }
0148
0149     return 0;
0150 }
0151
0152 int
0153 nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
0154 {
0155     struct nvbios_therm_trip_point *cur_trip = NULL;
0156     u8 ver, len, i;
0157     u32 entry;
0158
0159     uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
0160                 75, 0, 85, 0, 100, 0, 100, 0 };
0161
0162     i = 0;
0163     fan->nr_fan_trip = 0;
0164     fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
0165     while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
0166         s16 value = nvbios_rd16(bios, entry + 1);
0167
0168         switch (nvbios_rd08(bios, entry + 0)) {
0169         case 0x22:
0170             fan->min_duty = value & 0xff;
0171             fan->max_duty = (value & 0xff00) >> 8;
0172             break;
0173         case 0x24:
0174             fan->nr_fan_trip++;
0175             if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
0176                 fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
0177             cur_trip = &fan->trip[fan->nr_fan_trip - 1];
0178             cur_trip->hysteresis = value & 0xf;
0179             cur_trip->temp = (value & 0xff0) >> 4;
0180             cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
0181             break;
0182         case 0x25:
0183             cur_trip = &fan->trip[fan->nr_fan_trip - 1];
0184             cur_trip->fan_duty = value;
0185             break;
0186         case 0x26:
0187             if (!fan->pwm_freq)
0188                 fan->pwm_freq = value;
0189             break;
0190         case 0x3b:
0191             fan->bump_period = value;
0192             break;
0193         case 0x3c:
0194             fan->slow_down_period = value;
0195             break;
0196         case 0x46:
0197             if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
0198                 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
0199             fan->linear_min_temp = nvbios_rd08(bios, entry + 1);
0200             fan->linear_max_temp = nvbios_rd08(bios, entry + 2);
0201             break;
0202         }
0203     }
0204
0205     /* starting from fermi, fan management is always linear */
0206     if (bios->subdev.device->card_type >= NV_C0 &&
0207         fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
0208         fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
0209     }
0210
0211     return 0;
0212 }