cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/subdev/bios/therm.c

/*
 * Copyright 2012 Nouveau Community
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Martin Peres
 */
#include <subdev/bios.h>
#include <subdev/bios/bit.h>
#include <subdev/bios/therm.h>


static u32 therm_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt) { struct bit_entry bit_P; u32 therm = 0; if (!bit_entry(bios, 'P', &bit_P)) { if (bit_P.version == 1) therm = nvbios_rd32(bios, bit_P.offset + 12); else if (bit_P.version == 2) therm = nvbios_rd32(bios, bit_P.offset + 16); else nvkm_error(&bios->subdev, "unknown offset for thermal in BIT P %d\n", bit_P.version); } /* exit now if we haven't found the thermal table */ if (!therm) return 0; *ver = nvbios_rd08(bios, therm + 0); *hdr = nvbios_rd08(bios, therm + 1); *len = nvbios_rd08(bios, therm + 2); *cnt = nvbios_rd08(bios, therm + 3); return therm + nvbios_rd08(bios, therm + 1); }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres16391.57%120.00%
Ben Skeggs158.43%480.00%
Total178100.00%5100.00%


static u32 nvbios_therm_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len) { u8 hdr, cnt; u32 therm = therm_table(bios, ver, &hdr, len, &cnt); if (therm && idx < cnt) return therm + idx * *len; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres5992.19%125.00%
Ben Skeggs46.25%250.00%
Marcin Ślusarz11.56%125.00%
Total64100.00%4100.00%


int nvbios_therm_sensor_parse(struct nvkm_bios *bios, enum nvbios_therm_domain domain, struct nvbios_therm_sensor *sensor) { s8 thrs_section, sensor_section, offset; u8 ver, len, i; u32 entry; /* we only support the core domain for now */ if (domain != NVBIOS_THERM_DOMAIN_CORE) return -EINVAL; /* Read the entries from the table */ thrs_section = 0; sensor_section = -1; i = 0; while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { s16 value = nvbios_rd16(bios, entry + 1); switch (nvbios_rd08(bios, entry + 0)) { case 0x0: thrs_section = value; if (value > 0) return 0; /* we do not try to support ambient */ break; case 0x01: sensor_section++; if (sensor_section == 0) { offset = ((s8) nvbios_rd08(bios, entry + 2)) / 2; sensor->offset_constant = offset; } break; case 0x04: if (thrs_section == 0) { sensor->thrs_critical.temp = (value & 0xff0) >> 4; sensor->thrs_critical.hysteresis = value & 0xf; } break; case 0x07: if (thrs_section == 0) { sensor->thrs_down_clock.temp = (value & 0xff0) >> 4; sensor->thrs_down_clock.hysteresis = value & 0xf; } break; case 0x08: if (thrs_section == 0) { sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4; sensor->thrs_fan_boost.hysteresis = value & 0xf; } break; case 0x10: if (sensor_section == 0) sensor->offset_num = value; break; case 0x11: if (sensor_section == 0) sensor->offset_den = value; break; case 0x12: if (sensor_section == 0) sensor->slope_mult = value; break; case 0x13: if (sensor_section == 0) sensor->slope_div = value; break; case 0x32: if (thrs_section == 0) { sensor->thrs_shutdown.temp = (value & 0xff0) >> 4; sensor->thrs_shutdown.hysteresis = value & 0xf; } break; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres37198.67%125.00%
Ben Skeggs51.33%375.00%
Total376100.00%4100.00%


int nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) { struct nvbios_therm_trip_point *cur_trip = NULL; u8 ver, len, i; u32 entry; uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0, 75, 0, 85, 0, 100, 0, 100, 0 }; i = 0; fan->nr_fan_trip = 0; fan->fan_mode = NVBIOS_THERM_FAN_OTHER; while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) { s16 value = nvbios_rd16(bios, entry + 1); switch (nvbios_rd08(bios, entry + 0)) { case 0x22: fan->min_duty = value & 0xff; fan->max_duty = (value & 0xff00) >> 8; break; case 0x24: fan->nr_fan_trip++; if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP) fan->fan_mode = NVBIOS_THERM_FAN_TRIP; cur_trip = &fan->trip[fan->nr_fan_trip - 1]; cur_trip->hysteresis = value & 0xf; cur_trip->temp = (value & 0xff0) >> 4; cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12]; break; case 0x25: cur_trip = &fan->trip[fan->nr_fan_trip - 1]; cur_trip->fan_duty = value; break; case 0x26: if (!fan->pwm_freq) fan->pwm_freq = value; break; case 0x3b: fan->bump_period = value; break; case 0x3c: fan->slow_down_period = value; break; case 0x46: if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR) fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; fan->linear_min_temp = nvbios_rd08(bios, entry + 1); fan->linear_max_temp = nvbios_rd08(bios, entry + 2); break; } } /* starting from fermi, fan management is always linear */ if (bios->subdev.device->card_type >= NV_C0 && fan->fan_mode == NVBIOS_THERM_FAN_OTHER) { fan->fan_mode = NVBIOS_THERM_FAN_LINEAR; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Martin Peres35396.98%450.00%
Ben Skeggs113.02%450.00%
Total364100.00%8100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Martin Peres95696.37%440.00%
Ben Skeggs353.53%550.00%
Marcin Ślusarz10.10%110.00%
Total992100.00%10100.00%
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