| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tushar Dave | 803 | 46.28% | 1 | 2.56% |
| Srinivas Pandruvada | 240 | 13.83% | 5 | 12.82% |
| Rafael J. Wysocki | 216 | 12.45% | 10 | 25.64% |
| Sumeet Pawnikar | 179 | 10.32% | 3 | 7.69% |
| OGAWA Hirofumi | 96 | 5.53% | 1 | 2.56% |
| Daniel Lezcano | 41 | 2.36% | 3 | 7.69% |
| Rui Zhang | 40 | 2.31% | 3 | 7.69% |
| Andrzej Pietrasiewicz | 24 | 1.38% | 1 | 2.56% |
| Andres Freund | 21 | 1.21% | 1 | 2.56% |
| Tim Zimmermann | 20 | 1.15% | 1 | 2.56% |
| Gayatri Kammela | 20 | 1.15% | 1 | 2.56% |
| Kai-Heng Feng | 18 | 1.04% | 1 | 2.56% |
| Ed Swierk | 6 | 0.35% | 2 | 5.13% |
| Chuhong Yuan | 5 | 0.29% | 2 | 5.13% |
| Thomas Gleixner | 2 | 0.12% | 1 | 2.56% |
| Akinobu Mita | 2 | 0.12% | 1 | 2.56% |
| Arvind Yadav | 1 | 0.06% | 1 | 2.56% |
| Linus Torvalds | 1 | 0.06% | 1 | 2.56% |
| Total | 1735 | 39 |
// SPDX-License-Identifier: GPL-2.0-only /* intel_pch_thermal.c - Intel PCH Thermal driver * * Copyright (c) 2015, Intel Corporation. * * Authors: * Tushar Dave <tushar.n.dave@intel.com> */ #include <linux/acpi.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/pm.h> #include <linux/suspend.h> #include <linux/thermal.h> #include <linux/types.h> #include <linux/units.h> /* Intel PCH thermal Device IDs */ #define PCH_THERMAL_DID_HSW_1 0x9C24 /* Haswell PCH */ #define PCH_THERMAL_DID_HSW_2 0x8C24 /* Haswell PCH */ #define PCH_THERMAL_DID_WPT 0x9CA4 /* Wildcat Point */ #define PCH_THERMAL_DID_SKL 0x9D31 /* Skylake PCH */ #define PCH_THERMAL_DID_SKL_H 0xA131 /* Skylake PCH 100 series */ #define PCH_THERMAL_DID_CNL 0x9Df9 /* CNL PCH */ #define PCH_THERMAL_DID_CNL_H 0xA379 /* CNL-H PCH */ #define PCH_THERMAL_DID_CNL_LP 0x02F9 /* CNL-LP PCH */ #define PCH_THERMAL_DID_CML_H 0X06F9 /* CML-H PCH */ #define PCH_THERMAL_DID_LWB 0xA1B1 /* Lewisburg PCH */ #define PCH_THERMAL_DID_WBG 0x8D24 /* Wellsburg PCH */ /* Wildcat Point-LP PCH Thermal registers */ #define WPT_TEMP 0x0000 /* Temperature */ #define WPT_TSC 0x04 /* Thermal Sensor Control */ #define WPT_TSS 0x06 /* Thermal Sensor Status */ #define WPT_TSEL 0x08 /* Thermal Sensor Enable and Lock */ #define WPT_TSREL 0x0A /* Thermal Sensor Report Enable and Lock */ #define WPT_TSMIC 0x0C /* Thermal Sensor SMI Control */ #define WPT_CTT 0x0010 /* Catastrophic Trip Point */ #define WPT_TSPM 0x001C /* Thermal Sensor Power Management */ #define WPT_TAHV 0x0014 /* Thermal Alert High Value */ #define WPT_TALV 0x0018 /* Thermal Alert Low Value */ #define WPT_TL 0x00000040 /* Throttle Value */ #define WPT_PHL 0x0060 /* PCH Hot Level */ #define WPT_PHLC 0x62 /* PHL Control */ #define WPT_TAS 0x80 /* Thermal Alert Status */ #define WPT_TSPIEN 0x82 /* PCI Interrupt Event Enables */ #define WPT_TSGPEN 0x84 /* General Purpose Event Enables */ /* Wildcat Point-LP PCH Thermal Register bit definitions */ #define WPT_TEMP_TSR 0x01ff /* Temp TS Reading */ #define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */ #define WPT_TSS_TSDSS 0x10 /* Thermal Sensor Dynamic Shutdown Status */ #define WPT_TSS_GPES 0x08 /* GPE status */ #define WPT_TSEL_ETS 0x01 /* Enable TS */ #define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */ #define WPT_TL_TOL 0x000001FF /* T0 Level */ #define WPT_TL_T1L 0x1ff00000 /* T1 Level */ #define WPT_TL_TTEN 0x20000000 /* TT Enable */ /* Resolution of 1/2 degree C and an offset of -50C */ #define PCH_TEMP_OFFSET (-50) #define GET_WPT_TEMP(x) ((x) * MILLIDEGREE_PER_DEGREE / 2 + WPT_TEMP_OFFSET) #define WPT_TEMP_OFFSET (PCH_TEMP_OFFSET * MILLIDEGREE_PER_DEGREE) #define GET_PCH_TEMP(x) (((x) / 2) + PCH_TEMP_OFFSET) #define PCH_MAX_TRIPS 3 /* critical, hot, passive */ /* Amount of time for each cooling delay, 100ms by default for now */ static unsigned int delay_timeout = 100; module_param(delay_timeout, int, 0644); MODULE_PARM_DESC(delay_timeout, "amount of time delay for each iteration."); /* Number of iterations for cooling delay, 600 counts by default for now */ static unsigned int delay_cnt = 600; module_param(delay_cnt, int, 0644); MODULE_PARM_DESC(delay_cnt, "total number of iterations for time delay."); static char driver_name[] = "Intel PCH thermal driver"; struct pch_thermal_device { void __iomem *hw_base; struct pci_dev *pdev; struct thermal_zone_device *tzd; bool bios_enabled; }; #ifdef CONFIG_ACPI /* * On some platforms, there is a companion ACPI device, which adds * passive trip temperature using _PSV method. There is no specific * passive temperature setting in MMIO interface of this PCI device. */ static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, struct thermal_trip *trip) { struct acpi_device *adev; int temp; adev = ACPI_COMPANION(&ptd->pdev->dev); if (!adev) return 0; if (thermal_acpi_passive_trip_temp(adev, &temp) || temp <= 0) return 0; trip->type = THERMAL_TRIP_PASSIVE; trip->temperature = temp; return 1; } #else static int pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, struct thermal_trip *trip) { return 0; } #endif static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp) { struct pch_thermal_device *ptd = thermal_zone_device_priv(tzd); *temp = GET_WPT_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); return 0; } static void pch_critical(struct thermal_zone_device *tzd) { dev_dbg(thermal_zone_device(tzd), "%s: critical temperature reached\n", thermal_zone_device_type(tzd)); } static const struct thermal_zone_device_ops tzd_ops = { .get_temp = pch_thermal_get_temp, .critical = pch_critical, }; enum pch_board_ids { PCH_BOARD_HSW = 0, PCH_BOARD_WPT, PCH_BOARD_SKL, PCH_BOARD_CNL, PCH_BOARD_CML, PCH_BOARD_LWB, PCH_BOARD_WBG, }; static const char *board_names[] = { [PCH_BOARD_HSW] = "pch_haswell", [PCH_BOARD_WPT] = "pch_wildcat_point", [PCH_BOARD_SKL] = "pch_skylake", [PCH_BOARD_CNL] = "pch_cannonlake", [PCH_BOARD_CML] = "pch_cometlake", [PCH_BOARD_LWB] = "pch_lewisburg", [PCH_BOARD_WBG] = "pch_wellsburg", }; static int intel_pch_thermal_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct thermal_trip ptd_trips[PCH_MAX_TRIPS] = { 0 }; enum pch_board_ids board_id = id->driver_data; struct pch_thermal_device *ptd; int nr_trips = 0; u16 trip_temp; u8 tsel; int err; ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL); if (!ptd) return -ENOMEM; pci_set_drvdata(pdev, ptd); ptd->pdev = pdev; err = pci_enable_device(pdev); if (err) { dev_err(&pdev->dev, "failed to enable pci device\n"); return err; } err = pci_request_regions(pdev, driver_name); if (err) { dev_err(&pdev->dev, "failed to request pci region\n"); goto error_disable; } ptd->hw_base = pci_ioremap_bar(pdev, 0); if (!ptd->hw_base) { err = -ENOMEM; dev_err(&pdev->dev, "failed to map mem base\n"); goto error_release; } /* Check if BIOS has already enabled thermal sensor */ if (WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL)) { ptd->bios_enabled = true; goto read_trips; } tsel = readb(ptd->hw_base + WPT_TSEL); /* * When TSEL's Policy Lock-Down bit is 1, TSEL become RO. * If so, thermal sensor cannot enable. Bail out. */ if (tsel & WPT_TSEL_PLDB) { dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n"); err = -ENODEV; goto error_cleanup; } writeb(tsel|WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL); if (!(WPT_TSEL_ETS & readb(ptd->hw_base + WPT_TSEL))) { dev_err(&ptd->pdev->dev, "Sensor can't be enabled\n"); err = -ENODEV; goto error_cleanup; } read_trips: trip_temp = readw(ptd->hw_base + WPT_CTT); trip_temp &= 0x1FF; if (trip_temp) { ptd_trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp); ptd_trips[nr_trips++].type = THERMAL_TRIP_CRITICAL; } trip_temp = readw(ptd->hw_base + WPT_PHL); trip_temp &= 0x1FF; if (trip_temp) { ptd_trips[nr_trips].temperature = GET_WPT_TEMP(trip_temp); ptd_trips[nr_trips++].type = THERMAL_TRIP_HOT; } nr_trips += pch_wpt_add_acpi_psv_trip(ptd, &ptd_trips[nr_trips]); ptd->tzd = thermal_zone_device_register_with_trips(board_names[board_id], ptd_trips, nr_trips, ptd, &tzd_ops, NULL, 0, 0); if (IS_ERR(ptd->tzd)) { dev_err(&pdev->dev, "Failed to register thermal zone %s\n", board_names[board_id]); err = PTR_ERR(ptd->tzd); goto error_cleanup; } err = thermal_zone_device_enable(ptd->tzd); if (err) goto err_unregister; return 0; err_unregister: thermal_zone_device_unregister(ptd->tzd); error_cleanup: iounmap(ptd->hw_base); error_release: pci_release_regions(pdev); error_disable: pci_disable_device(pdev); dev_err(&pdev->dev, "pci device failed to probe\n"); return err; } static void intel_pch_thermal_remove(struct pci_dev *pdev) { struct pch_thermal_device *ptd = pci_get_drvdata(pdev); thermal_zone_device_unregister(ptd->tzd); iounmap(ptd->hw_base); pci_set_drvdata(pdev, NULL); pci_release_regions(pdev); pci_disable_device(pdev); } static int intel_pch_thermal_suspend_noirq(struct device *device) { struct pch_thermal_device *ptd = dev_get_drvdata(device); u16 pch_thr_temp, pch_cur_temp; int pch_delay_cnt = 0; u8 tsel; /* Shutdown the thermal sensor if it is not enabled by BIOS */ if (!ptd->bios_enabled) { tsel = readb(ptd->hw_base + WPT_TSEL); writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL); return 0; } /* Do not check temperature if it is not s2idle */ if (pm_suspend_via_firmware()) return 0; /* Get the PCH temperature threshold value */ pch_thr_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TSPM)); /* Get the PCH current temperature value */ pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); /* * If current PCH temperature is higher than configured PCH threshold * value, run some delay loop with sleep to let the current temperature * go down below the threshold value which helps to allow system enter * lower power S0ix suspend state. Even after delay loop if PCH current * temperature stays above threshold, notify the warning message * which helps to indentify the reason why S0ix entry was rejected. */ while (pch_delay_cnt < delay_cnt) { if (pch_cur_temp < pch_thr_temp) break; if (pm_wakeup_pending()) { dev_warn(&ptd->pdev->dev, "Wakeup event detected, abort cooling\n"); return 0; } pch_delay_cnt++; dev_dbg(&ptd->pdev->dev, "CPU-PCH current temp [%dC] higher than the threshold temp [%dC], sleep %d times for %d ms duration\n", pch_cur_temp, pch_thr_temp, pch_delay_cnt, delay_timeout); msleep(delay_timeout); /* Read the PCH current temperature for next cycle. */ pch_cur_temp = GET_PCH_TEMP(WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP)); } if (pch_cur_temp >= pch_thr_temp) dev_warn(&ptd->pdev->dev, "CPU-PCH is hot [%dC] after %d ms delay. S0ix might fail\n", pch_cur_temp, pch_delay_cnt * delay_timeout); else { if (pch_delay_cnt) dev_info(&ptd->pdev->dev, "CPU-PCH is cool [%dC] after %d ms delay\n", pch_cur_temp, pch_delay_cnt * delay_timeout); else dev_info(&ptd->pdev->dev, "CPU-PCH is cool [%dC]\n", pch_cur_temp); } return 0; } static int intel_pch_thermal_resume(struct device *device) { struct pch_thermal_device *ptd = dev_get_drvdata(device); u8 tsel; if (ptd->bios_enabled) return 0; tsel = readb(ptd->hw_base + WPT_TSEL); writeb(tsel | WPT_TSEL_ETS, ptd->hw_base + WPT_TSEL); return 0; } static const struct pci_device_id intel_pch_thermal_id[] = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1), .driver_data = PCH_BOARD_HSW, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2), .driver_data = PCH_BOARD_HSW, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT), .driver_data = PCH_BOARD_WPT, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL), .driver_data = PCH_BOARD_SKL, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H), .driver_data = PCH_BOARD_SKL, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL), .driver_data = PCH_BOARD_CNL, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H), .driver_data = PCH_BOARD_CNL, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_LP), .driver_data = PCH_BOARD_CNL, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CML_H), .driver_data = PCH_BOARD_CML, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_LWB), .driver_data = PCH_BOARD_LWB, }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WBG), .driver_data = PCH_BOARD_WBG, }, { 0, }, }; MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id); static const struct dev_pm_ops intel_pch_pm_ops = { .suspend_noirq = intel_pch_thermal_suspend_noirq, .resume = intel_pch_thermal_resume, }; static struct pci_driver intel_pch_thermal_driver = { .name = "intel_pch_thermal", .id_table = intel_pch_thermal_id, .probe = intel_pch_thermal_probe, .remove = intel_pch_thermal_remove, .driver.pm = &intel_pch_pm_ops, }; module_pci_driver(intel_pch_thermal_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Intel PCH Thermal driver");
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