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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-05 16:07:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-05 16:07:28 -0800 |
commit | 5c4a60831aa6d937cec9cf17aef8eb6c1851bfcd (patch) | |
tree | 48260369e439c34105735596b63ea44a84a1da05 /drivers/thermal/intel | |
parent | c280230254635da33703dd8f4a10cad23f640fb0 (diff) | |
parent | 24ef9ec891c761483c5270528781b8637b908eef (diff) | |
download | linux-5c4a60831aa6d937cec9cf17aef8eb6c1851bfcd.tar.gz linux-5c4a60831aa6d937cec9cf17aef8eb6c1851bfcd.tar.bz2 linux-5c4a60831aa6d937cec9cf17aef8eb6c1851bfcd.zip |
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Pull thermal management updates from Zhang Rui:
- Add locking for cooling device sysfs attribute in case the cooling
device state is changed by userspace and thermal framework
simultaneously. (Thara Gopinath)
- Fix a problem that passive cooling is reset improperly after system
suspend/resume. (Wei Wang)
- Cleanup the driver/thermal/ directory by moving intel and qcom
platform specific drivers to platform specific sub-directories. (Amit
Kucheria)
- Some trivial cleanups. (Lukasz Luba, Wolfram Sang)
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
thermal/intel: fixup for Kconfig string parsing tightening up
drivers: thermal: Move QCOM_SPMI_TEMP_ALARM into the qcom subdir
drivers: thermal: Move various drivers for intel platforms into a subdir
thermal: Fix locking in cooling device sysfs update cur_state
Thermal: do not clear passive state during system sleep
thermal: zx2967_thermal: simplify getting .driver_data
thermal: st: st_thermal: simplify getting .driver_data
thermal: spear_thermal: simplify getting .driver_data
thermal: rockchip_thermal: simplify getting .driver_data
thermal: int340x_thermal: int3400_thermal: simplify getting .driver_data
thermal: remove unused function parameter
Diffstat (limited to 'drivers/thermal/intel')
21 files changed, 5757 insertions, 0 deletions
diff --git a/drivers/thermal/intel/Kconfig b/drivers/thermal/intel/Kconfig new file mode 100644 index 000000000000..2e013eeb4a1d --- /dev/null +++ b/drivers/thermal/intel/Kconfig @@ -0,0 +1,77 @@ +config INTEL_POWERCLAMP + tristate "Intel PowerClamp idle injection driver" + depends on THERMAL + depends on X86 + depends on CPU_SUP_INTEL + help + Enable this to enable Intel PowerClamp idle injection driver. This + enforce idle time which results in more package C-state residency. The + user interface is exposed via generic thermal framework. + +config X86_PKG_TEMP_THERMAL + tristate "X86 package temperature thermal driver" + depends on X86_THERMAL_VECTOR + select THERMAL_GOV_USER_SPACE + select THERMAL_WRITABLE_TRIPS + default m + help + Enable this to register CPU digital sensor for package temperature as + thermal zone. Each package will have its own thermal zone. There are + two trip points which can be set by user to get notifications via thermal + notification methods. + +config INTEL_SOC_DTS_IOSF_CORE + tristate + depends on X86 && PCI + select IOSF_MBI + help + This is becoming a common feature for Intel SoCs to expose the additional + digital temperature sensors (DTSs) using side band interface (IOSF). This + implements the common set of helper functions to register, get temperature + and get/set thresholds on DTSs. + +config INTEL_SOC_DTS_THERMAL + tristate "Intel SoCs DTS thermal driver" + depends on X86 && PCI && ACPI + select INTEL_SOC_DTS_IOSF_CORE + select THERMAL_WRITABLE_TRIPS + help + Enable this to register Intel SoCs (e.g. Bay Trail) platform digital + temperature sensor (DTS). These SoCs have two additional DTSs in + addition to DTSs on CPU cores. Each DTS will be registered as a + thermal zone. There are two trip points. One of the trip point can + be set by user mode programs to get notifications via Linux thermal + notification methods.The other trip is a critical trip point, which + was set by the driver based on the TJ MAX temperature. + +config INTEL_QUARK_DTS_THERMAL + tristate "Intel Quark DTS thermal driver" + depends on X86_INTEL_QUARK + help + Enable this to register Intel Quark SoC (e.g. X1000) platform digital + temperature sensor (DTS). For X1000 SoC, it has one on-die DTS. + The DTS will be registered as a thermal zone. There are two trip points: + hot & critical. The critical trip point default value is set by + underlying BIOS/Firmware. + +menu "ACPI INT340X thermal drivers" +source "drivers/thermal/intel/int340x_thermal/Kconfig" +endmenu + +config INTEL_BXT_PMIC_THERMAL + tristate "Intel Broxton PMIC thermal driver" + depends on X86 && INTEL_SOC_PMIC_BXTWC && REGMAP + help + Select this driver for Intel Broxton PMIC with ADC channels monitoring + system temperature measurements and alerts. + This driver is used for monitoring the ADC channels of PMIC and handles + the alert trip point interrupts and notifies the thermal framework with + the trip point and temperature details of the zone. + +config INTEL_PCH_THERMAL + tristate "Intel PCH Thermal Reporting Driver" + depends on X86 && PCI + help + Enable this to support thermal reporting on certain intel PCHs. + Thermal reporting device will provide temperature reading, + programmable trip points and other information. diff --git a/drivers/thermal/intel/Makefile b/drivers/thermal/intel/Makefile new file mode 100644 index 000000000000..0d9736ced5d4 --- /dev/null +++ b/drivers/thermal/intel/Makefile @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for various Intel thermal drivers. + +obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o +obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o +obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE) += intel_soc_dts_iosf.o +obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o +obj-$(CONFIG_INTEL_QUARK_DTS_THERMAL) += intel_quark_dts_thermal.o +obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/ +obj-$(CONFIG_INTEL_BXT_PMIC_THERMAL) += intel_bxt_pmic_thermal.o +obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o diff --git a/drivers/thermal/intel/int340x_thermal/Kconfig b/drivers/thermal/intel/int340x_thermal/Kconfig new file mode 100644 index 000000000000..0582bd12a239 --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/Kconfig @@ -0,0 +1,42 @@ +# +# ACPI INT340x thermal drivers configuration +# + +config INT340X_THERMAL + tristate "ACPI INT340X thermal drivers" + depends on X86 && ACPI + select THERMAL_GOV_USER_SPACE + select ACPI_THERMAL_REL + select ACPI_FAN + select INTEL_SOC_DTS_IOSF_CORE + help + Newer laptops and tablets that use ACPI may have thermal sensors and + other devices with thermal control capabilities outside the core + CPU/SOC, for thermal safety reasons. + They are exposed for the OS to use via the INT3400 ACPI device object + as the master, and INT3401~INT340B ACPI device objects as the slaves. + Enable this to expose the temperature information and cooling ability + from these objects to userspace via the normal thermal framework. + This means that a wide range of applications and GUI widgets can show + the information to the user or use this information for making + decisions. For example, the Intel Thermal Daemon can use this + information to allow the user to select his laptop to run without + turning on the fans. + +config ACPI_THERMAL_REL + tristate + depends on ACPI + +if INT340X_THERMAL + +config INT3406_THERMAL + tristate "ACPI INT3406 display thermal driver" + depends on ACPI_VIDEO + help + The display thermal device represents the LED/LCD display panel + that may or may not include touch support. The main function of + the display thermal device is to allow control of the display + brightness in order to address a thermal condition or to reduce + power consumed by display device. + +endif diff --git a/drivers/thermal/intel/int340x_thermal/Makefile b/drivers/thermal/intel/int340x_thermal/Makefile new file mode 100644 index 000000000000..287eb0a1476d --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_INT340X_THERMAL) += int3400_thermal.o +obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal_zone.o +obj-$(CONFIG_INT340X_THERMAL) += int3402_thermal.o +obj-$(CONFIG_INT340X_THERMAL) += int3403_thermal.o +obj-$(CONFIG_INT340X_THERMAL) += processor_thermal_device.o +obj-$(CONFIG_INT3406_THERMAL) += int3406_thermal.o +obj-$(CONFIG_ACPI_THERMAL_REL) += acpi_thermal_rel.o diff --git a/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c new file mode 100644 index 000000000000..45e7e5cbdffb --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.c @@ -0,0 +1,394 @@ +/* acpi_thermal_rel.c driver for exporting ACPI thermal relationship + * + * Copyright (c) 2014 Intel Corp + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + */ + +/* + * Two functionalities included: + * 1. Export _TRT, _ART, via misc device interface to the userspace. + * 2. Provide parsing result to kernel drivers + * + */ +#include <linux/init.h> +#include <linux/export.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/acpi.h> +#include <linux/uaccess.h> +#include <linux/miscdevice.h> +#include "acpi_thermal_rel.h" + +static acpi_handle acpi_thermal_rel_handle; +static DEFINE_SPINLOCK(acpi_thermal_rel_chrdev_lock); +static int acpi_thermal_rel_chrdev_count; /* #times opened */ +static int acpi_thermal_rel_chrdev_exclu; /* already open exclusive? */ + +static int acpi_thermal_rel_open(struct inode *inode, struct file *file) +{ + spin_lock(&acpi_thermal_rel_chrdev_lock); + if (acpi_thermal_rel_chrdev_exclu || + (acpi_thermal_rel_chrdev_count && (file->f_flags & O_EXCL))) { + spin_unlock(&acpi_thermal_rel_chrdev_lock); + return -EBUSY; + } + + if (file->f_flags & O_EXCL) + acpi_thermal_rel_chrdev_exclu = 1; + acpi_thermal_rel_chrdev_count++; + + spin_unlock(&acpi_thermal_rel_chrdev_lock); + + return nonseekable_open(inode, file); +} + +static int acpi_thermal_rel_release(struct inode *inode, struct file *file) +{ + spin_lock(&acpi_thermal_rel_chrdev_lock); + acpi_thermal_rel_chrdev_count--; + acpi_thermal_rel_chrdev_exclu = 0; + spin_unlock(&acpi_thermal_rel_chrdev_lock); + + return 0; +} + +/** + * acpi_parse_trt - Thermal Relationship Table _TRT for passive cooling + * + * @handle: ACPI handle of the device contains _TRT + * @trt_count: the number of valid entries resulted from parsing _TRT + * @trtp: pointer to pointer of array of _TRT entries in parsing result + * @create_dev: whether to create platform devices for target and source + * + */ +int acpi_parse_trt(acpi_handle handle, int *trt_count, struct trt **trtp, + bool create_dev) +{ + acpi_status status; + int result = 0; + int i; + int nr_bad_entries = 0; + struct trt *trts; + struct acpi_device *adev; + union acpi_object *p; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_buffer element = { 0, NULL }; + struct acpi_buffer trt_format = { sizeof("RRNNNNNN"), "RRNNNNNN" }; + + if (!acpi_has_method(handle, "_TRT")) + return -ENODEV; + + status = acpi_evaluate_object(handle, "_TRT", NULL, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; + + p = buffer.pointer; + if (!p || (p->type != ACPI_TYPE_PACKAGE)) { + pr_err("Invalid _TRT data\n"); + result = -EFAULT; + goto end; + } + + *trt_count = p->package.count; + trts = kcalloc(*trt_count, sizeof(struct trt), GFP_KERNEL); + if (!trts) { + result = -ENOMEM; + goto end; + } + + for (i = 0; i < *trt_count; i++) { + struct trt *trt = &trts[i - nr_bad_entries]; + + element.length = sizeof(struct trt); + element.pointer = trt; + + status = acpi_extract_package(&(p->package.elements[i]), + &trt_format, &element); + if (ACPI_FAILURE(status)) { + nr_bad_entries++; + pr_warn("_TRT package %d is invalid, ignored\n", i); + continue; + } + if (!create_dev) + continue; + + result = acpi_bus_get_device(trt->source, &adev); + if (result) + pr_warn("Failed to get source ACPI device\n"); + + result = acpi_bus_get_device(trt->target, &adev); + if (result) + pr_warn("Failed to get target ACPI device\n"); + } + + result = 0; + + *trtp = trts; + /* don't count bad entries */ + *trt_count -= nr_bad_entries; +end: + kfree(buffer.pointer); + return result; +} +EXPORT_SYMBOL(acpi_parse_trt); + +/** + * acpi_parse_art - Parse Active Relationship Table _ART + * + * @handle: ACPI handle of the device contains _ART + * @art_count: the number of valid entries resulted from parsing _ART + * @artp: pointer to pointer of array of art entries in parsing result + * @create_dev: whether to create platform devices for target and source + * + */ +int acpi_parse_art(acpi_handle handle, int *art_count, struct art **artp, + bool create_dev) +{ + acpi_status status; + int result = 0; + int i; + int nr_bad_entries = 0; + struct art *arts; + struct acpi_device *adev; + union acpi_object *p; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_buffer element = { 0, NULL }; + struct acpi_buffer art_format = { + sizeof("RRNNNNNNNNNNN"), "RRNNNNNNNNNNN" }; + + if (!acpi_has_method(handle, "_ART")) + return -ENODEV; + + status = acpi_evaluate_object(handle, "_ART", NULL, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; + + p = buffer.pointer; + if (!p || (p->type != ACPI_TYPE_PACKAGE)) { + pr_err("Invalid _ART data\n"); + result = -EFAULT; + goto end; + } + + /* ignore p->package.elements[0], as this is _ART Revision field */ + *art_count = p->package.count - 1; + arts = kcalloc(*art_count, sizeof(struct art), GFP_KERNEL); + if (!arts) { + result = -ENOMEM; + goto end; + } + + for (i = 0; i < *art_count; i++) { + struct art *art = &arts[i - nr_bad_entries]; + + element.length = sizeof(struct art); + element.pointer = art; + + status = acpi_extract_package(&(p->package.elements[i + 1]), + &art_format, &element); + if (ACPI_FAILURE(status)) { + pr_warn("_ART package %d is invalid, ignored", i); + nr_bad_entries++; + continue; + } + if (!create_dev) + continue; + + if (art->source) { + result = acpi_bus_get_device(art->source, &adev); + if (result) + pr_warn("Failed to get source ACPI device\n"); + } + if (art->target) { + result = acpi_bus_get_device(art->target, &adev); + if (result) + pr_warn("Failed to get target ACPI device\n"); + } + } + + *artp = arts; + /* don't count bad entries */ + *art_count -= nr_bad_entries; +end: + kfree(buffer.pointer); + return result; +} +EXPORT_SYMBOL(acpi_parse_art); + + +/* get device name from acpi handle */ +static void get_single_name(acpi_handle handle, char *name) +{ + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; + + if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer))) + pr_warn("Failed to get device name from acpi handle\n"); + else { + memcpy(name, buffer.pointer, ACPI_NAME_SIZE); + kfree(buffer.pointer); + } +} + +static int fill_art(char __user *ubuf) +{ + int i; + int ret; + int count; + int art_len; + struct art *arts = NULL; + union art_object *art_user; + + ret = acpi_parse_art(acpi_thermal_rel_handle, &count, &arts, false); + if (ret) + goto free_art; + art_len = count * sizeof(union art_object); + art_user = kzalloc(art_len, GFP_KERNEL); + if (!art_user) { + ret = -ENOMEM; + goto free_art; + } + /* now fill in user art data */ + for (i = 0; i < count; i++) { + /* userspace art needs device name instead of acpi reference */ + get_single_name(arts[i].source, art_user[i].source_device); + get_single_name(arts[i].target, art_user[i].target_device); + /* copy the rest int data in addition to source and target */ + memcpy(&art_user[i].weight, &arts[i].weight, + sizeof(u64) * (ACPI_NR_ART_ELEMENTS - 2)); + } + + if (copy_to_user(ubuf, art_user, art_len)) + ret = -EFAULT; + kfree(art_user); +free_art: + kfree(arts); + return ret; +} + +static int fill_trt(char __user *ubuf) +{ + int i; + int ret; + int count; + int trt_len; + struct trt *trts = NULL; + union trt_object *trt_user; + + ret = acpi_parse_trt(acpi_thermal_rel_handle, &count, &trts, false); + if (ret) + goto free_trt; + trt_len = count * sizeof(union trt_object); + trt_user = kzalloc(trt_len, GFP_KERNEL); + if (!trt_user) { + ret = -ENOMEM; + goto free_trt; + } + /* now fill in user trt data */ + for (i = 0; i < count; i++) { + /* userspace trt needs device name instead of acpi reference */ + get_single_name(trts[i].source, trt_user[i].source_device); + get_single_name(trts[i].target, trt_user[i].target_device); + trt_user[i].sample_period = trts[i].sample_period; + trt_user[i].influence = trts[i].influence; + } + + if (copy_to_user(ubuf, trt_user, trt_len)) + ret = -EFAULT; + kfree(trt_user); +free_trt: + kfree(trts); + return ret; +} + +static long acpi_thermal_rel_ioctl(struct file *f, unsigned int cmd, + unsigned long __arg) +{ + int ret = 0; + unsigned long length = 0; + int count = 0; + char __user *arg = (void __user *)__arg; + struct trt *trts = NULL; + struct art *arts = NULL; + + switch (cmd) { + case ACPI_THERMAL_GET_TRT_COUNT: + ret = acpi_parse_trt(acpi_thermal_rel_handle, &count, + &trts, false); + kfree(trts); + if (!ret) + return put_user(count, (unsigned long __user *)__arg); + return ret; + case ACPI_THERMAL_GET_TRT_LEN: + ret = acpi_parse_trt(acpi_thermal_rel_handle, &count, + &trts, false); + kfree(trts); + length = count * sizeof(union trt_object); + if (!ret) + return put_user(length, (unsigned long __user *)__arg); + return ret; + case ACPI_THERMAL_GET_TRT: + return fill_trt(arg); + case ACPI_THERMAL_GET_ART_COUNT: + ret = acpi_parse_art(acpi_thermal_rel_handle, &count, + &arts, false); + kfree(arts); + if (!ret) + return put_user(count, (unsigned long __user *)__arg); + return ret; + case ACPI_THERMAL_GET_ART_LEN: + ret = acpi_parse_art(acpi_thermal_rel_handle, &count, + &arts, false); + kfree(arts); + length = count * sizeof(union art_object); + if (!ret) + return put_user(length, (unsigned long __user *)__arg); + return ret; + + case ACPI_THERMAL_GET_ART: + return fill_art(arg); + + default: + return -ENOTTY; + } +} + +static const struct file_operations acpi_thermal_rel_fops = { + .owner = THIS_MODULE, + .open = acpi_thermal_rel_open, + .release = acpi_thermal_rel_release, + .unlocked_ioctl = acpi_thermal_rel_ioctl, + .llseek = no_llseek, +}; + +static struct miscdevice acpi_thermal_rel_misc_device = { + .minor = MISC_DYNAMIC_MINOR, + "acpi_thermal_rel", + &acpi_thermal_rel_fops +}; + +int acpi_thermal_rel_misc_device_add(acpi_handle handle) +{ + acpi_thermal_rel_handle = handle; + + return misc_register(&acpi_thermal_rel_misc_device); +} +EXPORT_SYMBOL(acpi_thermal_rel_misc_device_add); + +int acpi_thermal_rel_misc_device_remove(acpi_handle handle) +{ + misc_deregister(&acpi_thermal_rel_misc_device); + + return 0; +} +EXPORT_SYMBOL(acpi_thermal_rel_misc_device_remove); + +MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>"); +MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@intel.com"); +MODULE_DESCRIPTION("Intel acpi thermal rel misc dev driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.h b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.h new file mode 100644 index 000000000000..58822575fd54 --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/acpi_thermal_rel.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ACPI_ACPI_THERMAL_H +#define __ACPI_ACPI_THERMAL_H + +#include <asm/ioctl.h> + +#define ACPI_THERMAL_MAGIC 's' + +#define ACPI_THERMAL_GET_TRT_LEN _IOR(ACPI_THERMAL_MAGIC, 1, unsigned long) +#define ACPI_THERMAL_GET_ART_LEN _IOR(ACPI_THERMAL_MAGIC, 2, unsigned long) +#define ACPI_THERMAL_GET_TRT_COUNT _IOR(ACPI_THERMAL_MAGIC, 3, unsigned long) +#define ACPI_THERMAL_GET_ART_COUNT _IOR(ACPI_THERMAL_MAGIC, 4, unsigned long) + +#define ACPI_THERMAL_GET_TRT _IOR(ACPI_THERMAL_MAGIC, 5, unsigned long) +#define ACPI_THERMAL_GET_ART _IOR(ACPI_THERMAL_MAGIC, 6, unsigned long) + +struct art { + acpi_handle source; + acpi_handle target; + u64 weight; + u64 ac0_max; + u64 ac1_max; + u64 ac2_max; + u64 ac3_max; + u64 ac4_max; + u64 ac5_max; + u64 ac6_max; + u64 ac7_max; + u64 ac8_max; + u64 ac9_max; +} __packed; + +struct trt { + acpi_handle source; + acpi_handle target; + u64 influence; + u64 sample_period; + u64 reserved1; + u64 reserved2; + u64 reserved3; + u64 reserved4; +} __packed; + +#define ACPI_NR_ART_ELEMENTS 13 +/* for usrspace */ +union art_object { + struct { + char source_device[8]; /* ACPI single name */ + char target_device[8]; /* ACPI single name */ + u64 weight; + u64 ac0_max_level; + u64 ac1_max_level; + u64 ac2_max_level; + u64 ac3_max_level; + u64 ac4_max_level; + u64 ac5_max_level; + u64 ac6_max_level; + u64 ac7_max_level; + u64 ac8_max_level; + u64 ac9_max_level; + }; + u64 __data[ACPI_NR_ART_ELEMENTS]; +}; + +union trt_object { + struct { + char source_device[8]; /* ACPI single name */ + char target_device[8]; /* ACPI single name */ + u64 influence; + u64 sample_period; + u64 reserved[4]; + }; + u64 __data[8]; +}; + +#ifdef __KERNEL__ +int acpi_thermal_rel_misc_device_add(acpi_handle handle); +int acpi_thermal_rel_misc_device_remove(acpi_handle handle); +int acpi_parse_art(acpi_handle handle, int *art_count, struct art **arts, + bool create_dev); +int acpi_parse_trt(acpi_handle handle, int *trt_count, struct trt **trts, + bool create_dev); +#endif + +#endif /* __ACPI_ACPI_THERMAL_H */ diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c new file mode 100644 index 000000000000..61ca7ce3624e --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c @@ -0,0 +1,382 @@ +/* + * INT3400 thermal driver + * + * Copyright (C) 2014, Intel Corporation + * Authors: Zhang Rui <rui.zhang@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include "acpi_thermal_rel.h" + +#define INT3400_THERMAL_TABLE_CHANGED 0x83 + +enum int3400_thermal_uuid { + INT3400_THERMAL_PASSIVE_1, + INT3400_THERMAL_ACTIVE, + INT3400_THERMAL_CRITICAL, + INT3400_THERMAL_MAXIMUM_UUID, +}; + +static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = { + "42A441D6-AE6A-462b-A84B-4A8CE79027D3", + "3A95C389-E4B8-4629-A526-C52C88626BAE", + "97C68AE7-15FA-499c-B8C9-5DA81D606E0A", +}; + +struct int3400_thermal_priv { + struct acpi_device *adev; + struct thermal_zone_device *thermal; + int mode; + int art_count; + struct art *arts; + int trt_count; + struct trt *trts; + u8 uuid_bitmap; + int rel_misc_dev_res; + int current_uuid_index; +}; + +static ssize_t available_uuids_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct int3400_thermal_priv *priv = dev_get_drvdata(dev); + int i; + int length = 0; + + for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) { + if (priv->uuid_bitmap & (1 << i)) + if (PAGE_SIZE - length > 0) + length += snprintf(&buf[length], + PAGE_SIZE - length, + "%s\n", + int3400_thermal_uuids[i]); + } + + return length; +} + +static ssize_t current_uuid_show(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct int3400_thermal_priv *priv = dev_get_drvdata(dev); + + if (priv->uuid_bitmap & (1 << priv->current_uuid_index)) + return sprintf(buf, "%s\n", + int3400_thermal_uuids[priv->current_uuid_index]); + else + return sprintf(buf, "INVALID\n"); +} + +static ssize_t current_uuid_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct int3400_thermal_priv *priv = dev_get_drvdata(dev); + int i; + + for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) { + if ((priv->uuid_bitmap & (1 << i)) && + !(strncmp(buf, int3400_thermal_uuids[i], + sizeof(int3400_thermal_uuids[i]) - 1))) { + priv->current_uuid_index = i; + return count; + } + } + + return -EINVAL; +} + +static DEVICE_ATTR_RW(current_uuid); +static DEVICE_ATTR_RO(available_uuids); +static struct attribute *uuid_attrs[] = { + &dev_attr_available_uuids.attr, + &dev_attr_current_uuid.attr, + NULL +}; + +static const struct attribute_group uuid_attribute_group = { + .attrs = uuid_attrs, + .name = "uuids" +}; + +static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv) +{ + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL}; + union acpi_object *obja, *objb; + int i, j; + int result = 0; + acpi_status status; + + status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf); + if (ACPI_FAILURE(status)) + return -ENODEV; + + obja = (union acpi_object *)buf.pointer; + if (obja->type != ACPI_TYPE_PACKAGE) { + result = -EINVAL; + goto end; + } + + for (i = 0; i < obja->package.count; i++) { + objb = &obja->package.elements[i]; + if (objb->type != ACPI_TYPE_BUFFER) { + result = -EINVAL; + goto end; + } + + /* UUID must be 16 bytes */ + if (objb->buffer.length != 16) { + result = -EINVAL; + goto end; + } + + for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) { + guid_t guid; + + guid_parse(int3400_thermal_uuids[j], &guid); + if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) { + priv->uuid_bitmap |= (1 << j); + break; + } + } + } + +end: + kfree(buf.pointer); + return result; +} + +static int int3400_thermal_run_osc(acpi_handle handle, + enum int3400_thermal_uuid uuid, bool enable) +{ + u32 ret, buf[2]; + acpi_status status; + int result = 0; + struct acpi_osc_context context = { + .uuid_str = int3400_thermal_uuids[uuid], + .rev = 1, + .cap.length = 8, + }; + + buf[OSC_QUERY_DWORD] = 0; + buf[OSC_SUPPORT_DWORD] = enable; + + context.cap.pointer = buf; + + status = acpi_run_osc(handle, &context); + if (ACPI_SUCCESS(status)) { + ret = *((u32 *)(context.ret.pointer + 4)); + if (ret != enable) + result = -EPERM; + } else + result = -EPERM; + + kfree(context.ret.pointer); + return result; +} + +static void int3400_notify(acpi_handle handle, + u32 event, + void *data) +{ + struct int3400_thermal_priv *priv = data; + char *thermal_prop[5]; + + if (!priv) + return; + + switch (event) { + case INT3400_THERMAL_TABLE_CHANGED: + thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", + priv->thermal->type); + thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", + priv->thermal->temperature); + thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP="); + thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", + THERMAL_TABLE_CHANGED); + thermal_prop[4] = NULL; + kobject_uevent_env(&priv->thermal->device.kobj, KOBJ_CHANGE, + thermal_prop); + break; + default: + /* Ignore unknown notification codes sent to INT3400 device */ + break; + } +} + +static int int3400_thermal_get_temp(struct thermal_zone_device *thermal, + int *temp) +{ + *temp = 20 * 1000; /* faked temp sensor with 20C */ + return 0; +} + +static int int3400_thermal_get_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode *mode) +{ + struct int3400_thermal_priv *priv = thermal->devdata; + + if (!priv) + return -EINVAL; + + *mode = priv->mode; + + return 0; +} + +static int int3400_thermal_set_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode mode) +{ + struct int3400_thermal_priv *priv = thermal->devdata; + bool enable; + int result = 0; + + if (!priv) + return -EINVAL; + + if (mode == THERMAL_DEVICE_ENABLED) + enable = true; + else if (mode == THERMAL_DEVICE_DISABLED) + enable = false; + else + return -EINVAL; + + if (enable != priv->mode) { + priv->mode = enable; + result = int3400_thermal_run_osc(priv->adev->handle, + priv->current_uuid_index, + enable); + } + return result; +} + +static struct thermal_zone_device_ops int3400_thermal_ops = { + .get_temp = int3400_thermal_get_temp, +}; + +static struct thermal_zone_params int3400_thermal_params = { + .governor_name = "user_space", + .no_hwmon = true, +}; + +static int int3400_thermal_probe(struct platform_device *pdev) +{ + struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); + struct int3400_thermal_priv *priv; + int result; + + if (!adev) + return -ENODEV; + + priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->adev = adev; + + result = int3400_thermal_get_uuids(priv); + if (result) + goto free_priv; + + result = acpi_parse_art(priv->adev->handle, &priv->art_count, + &priv->arts, true); + if (result) + dev_dbg(&pdev->dev, "_ART table parsing error\n"); + + result = acpi_parse_trt(priv->adev->handle, &priv->trt_count, + &priv->trts, true); + if (result) + dev_dbg(&pdev->dev, "_TRT table parsing error\n"); + + platform_set_drvdata(pdev, priv); + + if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) { + int3400_thermal_ops.get_mode = int3400_thermal_get_mode; + int3400_thermal_ops.set_mode = int3400_thermal_set_mode; + } + priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0, + priv, &int3400_thermal_ops, + &int3400_thermal_params, 0, 0); + if (IS_ERR(priv->thermal)) { + result = PTR_ERR(priv->thermal); + goto free_art_trt; + } + + priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add( + priv->adev->handle); + + result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group); + if (result) + goto free_rel_misc; + + result = acpi_install_notify_handler( + priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify, + (void *)priv); + if (result) + goto free_sysfs; + + return 0; + +free_sysfs: + sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group); +free_rel_misc: + if (!priv->rel_misc_dev_res) + acpi_thermal_rel_misc_device_remove(priv->adev->handle); + thermal_zone_device_unregister(priv->thermal); +free_art_trt: + kfree(priv->trts); + kfree(priv->arts); +free_priv: + kfree(priv); + return result; +} + +static int int3400_thermal_remove(struct platform_device *pdev) +{ + struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); + + acpi_remove_notify_handler( + priv->adev->handle, ACPI_DEVICE_NOTIFY, + int3400_notify); + + if (!priv->rel_misc_dev_res) + acpi_thermal_rel_misc_device_remove(priv->adev->handle); + + sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group); + thermal_zone_device_unregister(priv->thermal); + kfree(priv->trts); + kfree(priv->arts); + kfree(priv); + return 0; +} + +static const struct acpi_device_id int3400_thermal_match[] = { + {"INT3400", 0}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, int3400_thermal_match); + +static struct platform_driver int3400_thermal_driver = { + .probe = int3400_thermal_probe, + .remove = int3400_thermal_remove, + .driver = { + .name = "int3400 thermal", + .acpi_match_table = ACPI_PTR(int3400_thermal_match), + }, +}; + +module_platform_driver(int3400_thermal_driver); + +MODULE_DESCRIPTION("INT3400 Thermal driver"); +MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/thermal/intel/int340x_thermal/int3402_thermal.c b/drivers/thermal/intel/int340x_thermal/int3402_thermal.c new file mode 100644 index 000000000000..8e90b3151a42 --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int3402_thermal.c @@ -0,0 +1,108 @@ +/* + * INT3402 thermal driver for memory temperature reporting + * + * Copyright (C) 2014, Intel Corporation + * Authors: Aaron Lu <aaron.lu@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include "int340x_thermal_zone.h" + +#define INT3402_PERF_CHANGED_EVENT 0x80 +#define INT3402_THERMAL_EVENT 0x90 + +struct int3402_thermal_data { + acpi_handle *handle; + struct int34x_thermal_zone *int340x_zone; +}; + +static void int3402_notify(acpi_handle handle, u32 event, void *data) +{ + struct int3402_thermal_data *priv = data; + + if (!priv) + return; + + switch (event) { + case INT3402_PERF_CHANGED_EVENT: + break; + case INT3402_THERMAL_EVENT: + int340x_thermal_zone_device_update(priv->int340x_zone, + THERMAL_TRIP_VIOLATED); + break; + default: + break; + } +} + +static int int3402_thermal_probe(struct platform_device *pdev) +{ + struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); + struct int3402_thermal_data *d; + int ret; + + if (!acpi_has_method(adev->handle, "_TMP")) + return -ENODEV; + + d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL); + if (!d) + return -ENOMEM; + + d->int340x_zone = int340x_thermal_zone_add(adev, NULL); + if (IS_ERR(d->int340x_zone)) + return PTR_ERR(d->int340x_zone); + + ret = acpi_install_notify_handler(adev->handle, + ACPI_DEVICE_NOTIFY, + int3402_notify, + d); + if (ret) { + int340x_thermal_zone_remove(d->int340x_zone); + return ret; + } + + d->handle = adev->handle; + platform_set_drvdata(pdev, d); + + return 0; +} + +static int int3402_thermal_remove(struct platform_device *pdev) +{ + struct int3402_thermal_data *d = platform_get_drvdata(pdev); + + acpi_remove_notify_handler(d->handle, + ACPI_DEVICE_NOTIFY, int3402_notify); + int340x_thermal_zone_remove(d->int340x_zone); + + return 0; +} + +static const struct acpi_device_id int3402_thermal_match[] = { + {"INT3402", 0}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, int3402_thermal_match); + +static struct platform_driver int3402_thermal_driver = { + .probe = int3402_thermal_probe, + .remove = int3402_thermal_remove, + .driver = { + .name = "int3402 thermal", + .acpi_match_table = int3402_thermal_match, + }, +}; + +module_platform_driver(int3402_thermal_driver); + +MODULE_DESCRIPTION("INT3402 Thermal driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/thermal/intel/int340x_thermal/int3403_thermal.c b/drivers/thermal/intel/int340x_thermal/int3403_thermal.c new file mode 100644 index 000000000000..0c19fcd56a0d --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int3403_thermal.c @@ -0,0 +1,311 @@ +/* + * ACPI INT3403 thermal driver + * Copyright (c) 2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include <linux/platform_device.h> +#include "int340x_thermal_zone.h" + +#define INT3403_TYPE_SENSOR 0x03 +#define INT3403_TYPE_CHARGER 0x0B +#define INT3403_TYPE_BATTERY 0x0C +#define INT3403_PERF_CHANGED_EVENT 0x80 +#define INT3403_PERF_TRIP_POINT_CHANGED 0x81 +#define INT3403_THERMAL_EVENT 0x90 + +/* Preserved structure for future expandbility */ +struct int3403_sensor { + struct int34x_thermal_zone *int340x_zone; +}; + +struct int3403_performance_state { + u64 performance; + u64 power; + u64 latency; + u64 linear; + u64 control; + u64 raw_performace; + char *raw_unit; + int reserved; +}; + +struct int3403_cdev { + struct thermal_cooling_device *cdev; + unsigned long max_state; +}; + +struct int3403_priv { + struct platform_device *pdev; + struct acpi_device *adev; + unsigned long long type; + void *priv; +}; + +static void int3403_notify(acpi_handle handle, + u32 event, void *data) +{ + struct int3403_priv *priv = data; + struct int3403_sensor *obj; + + if (!priv) + return; + + obj = priv->priv; + if (priv->type != INT3403_TYPE_SENSOR || !obj) + return; + + switch (event) { + case INT3403_PERF_CHANGED_EVENT: + break; + case INT3403_THERMAL_EVENT: + int340x_thermal_zone_device_update(obj->int340x_zone, + THERMAL_TRIP_VIOLATED); + break; + case INT3403_PERF_TRIP_POINT_CHANGED: + int340x_thermal_read_trips(obj->int340x_zone); + int340x_thermal_zone_device_update(obj->int340x_zone, + THERMAL_TRIP_CHANGED); + break; + default: + dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event); + break; + } +} + +static int int3403_sensor_add(struct int3403_priv *priv) +{ + int result = 0; + struct int3403_sensor *obj; + + obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL); + if (!obj) + return -ENOMEM; + + priv->priv = obj; + + obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL); + if (IS_ERR(obj->int340x_zone)) + return PTR_ERR(obj->int340x_zone); + + result = acpi_install_notify_handler(priv->adev->handle, + ACPI_DEVICE_NOTIFY, int3403_notify, + (void *)priv); + if (result) + goto err_free_obj; + + return 0; + + err_free_obj: + int340x_thermal_zone_remove(obj->int340x_zone); + return result; +} + +static int int3403_sensor_remove(struct int3403_priv *priv) +{ + struct int3403_sensor *obj = priv->priv; + + acpi_remove_notify_handler(priv->adev->handle, + ACPI_DEVICE_NOTIFY, int3403_notify); + int340x_thermal_zone_remove(obj->int340x_zone); + + return 0; +} + +/* INT3403 Cooling devices */ +static int int3403_get_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct int3403_priv *priv = cdev->devdata; + struct int3403_cdev *obj = priv->priv; + + *state = obj->max_state; + return 0; +} + +static int int3403_get_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + struct int3403_priv *priv = cdev->devdata; + unsigned long long level; + acpi_status status; + + status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level); + if (ACPI_SUCCESS(status)) { + *state = level; + return 0; + } else + return -EINVAL; +} + +static int +int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state) +{ + struct int3403_priv *priv = cdev->devdata; + acpi_status status; + + status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state); + if (ACPI_SUCCESS(status)) + return 0; + else + return -EINVAL; +} + +static const struct thermal_cooling_device_ops int3403_cooling_ops = { + .get_max_state = int3403_get_max_state, + .get_cur_state = int3403_get_cur_state, + .set_cur_state = int3403_set_cur_state, +}; + +static int int3403_cdev_add(struct int3403_priv *priv) +{ + int result = 0; + acpi_status status; + struct int3403_cdev *obj; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *p; + + obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL); + if (!obj) + return -ENOMEM; + + status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf); + if (ACPI_FAILURE(status)) + return -ENODEV; + + p = buf.pointer; + if (!p || (p->type != ACPI_TYPE_PACKAGE)) { + printk(KERN_WARNING "Invalid PPSS data\n"); + kfree(buf.pointer); + return -EFAULT; + } + + priv->priv = obj; + obj->max_state = p->package.count - 1; + obj->cdev = + thermal_cooling_device_register(acpi_device_bid(priv->adev), + priv, &int3403_cooling_ops); + if (IS_ERR(obj->cdev)) + result = PTR_ERR(obj->cdev); + + kfree(buf.pointer); + /* TODO: add ACPI notification support */ + + return result; +} + +static int int3403_cdev_remove(struct int3403_priv *priv) +{ + struct int3403_cdev *obj = priv->priv; + + thermal_cooling_device_unregister(obj->cdev); + return 0; +} + +static int int3403_add(struct platform_device *pdev) +{ + struct int3403_priv *priv; + int result = 0; + acpi_status status; + + priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv), + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->pdev = pdev; + priv->adev = ACPI_COMPANION(&(pdev->dev)); + if (!priv->adev) { + result = -EINVAL; + goto err; + } + + status = acpi_evaluate_integer(priv->adev->handle, "PTYP", + NULL, &priv->type); + if (ACPI_FAILURE(status)) { + unsigned long long tmp; + + status = acpi_evaluate_integer(priv->adev->handle, "_TMP", + NULL, &tmp); + if (ACPI_FAILURE(status)) { + result = -EINVAL; + goto err; + } else { + priv->type = INT3403_TYPE_SENSOR; + } + } + + platform_set_drvdata(pdev, priv); + switch (priv->type) { + case INT3403_TYPE_SENSOR: + result = int3403_sensor_add(priv); + break; + case INT3403_TYPE_CHARGER: + case INT3403_TYPE_BATTERY: + result = int3403_cdev_add(priv); + break; + default: + result = -EINVAL; + } + + if (result) + goto err; + return result; + +err: + return result; +} + +static int int3403_remove(struct platform_device *pdev) +{ + struct int3403_priv *priv = platform_get_drvdata(pdev); + + switch (priv->type) { + case INT3403_TYPE_SENSOR: + int3403_sensor_remove(priv); + break; + case INT3403_TYPE_CHARGER: + case INT3403_TYPE_BATTERY: + int3403_cdev_remove(priv); + break; + default: + break; + } + + return 0; +} + +static const struct acpi_device_id int3403_device_ids[] = { + {"INT3403", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, int3403_device_ids); + +static struct platform_driver int3403_driver = { + .probe = int3403_add, + .remove = int3403_remove, + .driver = { + .name = "int3403 thermal", + .acpi_match_table = int3403_device_ids, + }, +}; + +module_platform_driver(int3403_driver); + +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("ACPI INT3403 thermal driver"); diff --git a/drivers/thermal/intel/int340x_thermal/int3406_thermal.c b/drivers/thermal/intel/int340x_thermal/int3406_thermal.c new file mode 100644 index 000000000000..f69ab026ba24 --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int3406_thermal.c @@ -0,0 +1,213 @@ +/* + * INT3406 thermal driver for display participant device + * + * Copyright (C) 2016, Intel Corporation + * Authors: Aaron Lu <aaron.lu@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/acpi.h> +#include <linux/backlight.h> +#include <linux/thermal.h> +#include <acpi/video.h> + +#define INT3406_BRIGHTNESS_LIMITS_CHANGED 0x80 + +struct int3406_thermal_data { + int upper_limit; + int lower_limit; + acpi_handle handle; + struct acpi_video_device_brightness *br; + struct backlight_device *raw_bd; + struct thermal_cooling_device *cooling_dev; +}; + +/* + * According to the ACPI spec, + * "Each brightness level is represented by a number between 0 and 100, + * and can be thought of as a percentage. For example, 50 can be 50% + * power consumption or 50% brightness, as defined by the OEM." + * + * As int3406 device uses this value to communicate with the native + * graphics driver, we make the assumption that it represents + * the percentage of brightness only + */ +#define ACPI_TO_RAW(v, d) (d->raw_bd->props.max_brightness * v / 100) +#define RAW_TO_ACPI(v, d) (v * 100 / d->raw_bd->props.max_brightness) + +static int +int3406_thermal_get_max_state(struct thermal_cooling_device *cooling_dev, + unsigned long *state) +{ + struct int3406_thermal_data *d = cooling_dev->devdata; + + *state = d->upper_limit - d->lower_limit; + return 0; +} + +static int +int3406_thermal_set_cur_state(struct thermal_cooling_device *cooling_dev, + unsigned long state) +{ + struct int3406_thermal_data *d = cooling_dev->devdata; + int acpi_level, raw_level; + + if (state > d->upper_limit - d->lower_limit) + return -EINVAL; + + acpi_level = d->br->levels[d->upper_limit - state]; + + raw_level = ACPI_TO_RAW(acpi_level, d); + + return backlight_device_set_brightness(d->raw_bd, raw_level); +} + +static int +int3406_thermal_get_cur_state(struct thermal_cooling_device *cooling_dev, + unsigned long *state) +{ + struct int3406_thermal_data *d = cooling_dev->devdata; + int acpi_level; + int index; + + acpi_level = RAW_TO_ACPI(d->raw_bd->props.brightness, d); + + /* + * There is no 1:1 mapping between the firmware interface level + * with the raw interface level, we will have to find one that is + * right above it. + */ + for (index = d->lower_limit; index < d->upper_limit; index++) { + if (acpi_level <= d->br->levels[index]) + break; + } + + *state = d->upper_limit - index; + return 0; +} + +static const struct thermal_cooling_device_ops video_cooling_ops = { + .get_max_state = int3406_thermal_get_max_state, + .get_cur_state = int3406_thermal_get_cur_state, + .set_cur_state = int3406_thermal_set_cur_state, +}; + +static int int3406_thermal_get_index(int *array, int nr, int value) +{ + int i; + + for (i = 2; i < nr; i++) { + if (array[i] == value) + break; + } + return i == nr ? -ENOENT : i; +} + +static void int3406_thermal_get_limit(struct int3406_thermal_data *d) +{ + acpi_status status; + unsigned long long lower_limit, upper_limit; + + status = acpi_evaluate_integer(d->handle, "DDDL", NULL, &lower_limit); + if (ACPI_SUCCESS(status)) + d->lower_limit = int3406_thermal_get_index(d->br->levels, + d->br->count, lower_limit); + + status = acpi_evaluate_integer(d->handle, "DDPC", NULL, &upper_limit); + if (ACPI_SUCCESS(status)) + d->upper_limit = int3406_thermal_get_index(d->br->levels, + d->br->count, upper_limit); + + /* lower_limit and upper_limit should be always set */ + d->lower_limit = d->lower_limit > 0 ? d->lower_limit : 2; + d->upper_limit = d->upper_limit > 0 ? d->upper_limit : d->br->count - 1; +} + +static void int3406_notify(acpi_handle handle, u32 event, void *data) +{ + if (event == INT3406_BRIGHTNESS_LIMITS_CHANGED) + int3406_thermal_get_limit(data); +} + +static int int3406_thermal_probe(struct platform_device *pdev) +{ + struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); + struct int3406_thermal_data *d; + struct backlight_device *bd; + int ret; + + if (!ACPI_HANDLE(&pdev->dev)) + return -ENODEV; + + d = devm_kzalloc(&pdev->dev, sizeof(*d), GFP_KERNEL); + if (!d) + return -ENOMEM; + d->handle = ACPI_HANDLE(&pdev->dev); + + bd = backlight_device_get_by_type(BACKLIGHT_RAW); + if (!bd) + return -ENODEV; + d->raw_bd = bd; + + ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br, NULL); + if (ret) + return ret; + + int3406_thermal_get_limit(d); + + d->cooling_dev = thermal_cooling_device_register(acpi_device_bid(adev), + d, &video_cooling_ops); + if (IS_ERR(d->cooling_dev)) + goto err; + + ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + int3406_notify, d); + if (ret) + goto err_cdev; + + platform_set_drvdata(pdev, d); + + return 0; + +err_cdev: + thermal_cooling_device_unregister(d->cooling_dev); +err: + kfree(d->br); + return -ENODEV; +} + +static int int3406_thermal_remove(struct platform_device *pdev) +{ + struct int3406_thermal_data *d = platform_get_drvdata(pdev); + + thermal_cooling_device_unregister(d->cooling_dev); + kfree(d->br); + return 0; +} + +static const struct acpi_device_id int3406_thermal_match[] = { + {"INT3406", 0}, + {} +}; + +MODULE_DEVICE_TABLE(acpi, int3406_thermal_match); + +static struct platform_driver int3406_thermal_driver = { + .probe = int3406_thermal_probe, + .remove = int3406_thermal_remove, + .driver = { + .name = "int3406 thermal", + .acpi_match_table = int3406_thermal_match, + }, +}; + +module_platform_driver(int3406_thermal_driver); + +MODULE_DESCRIPTION("INT3406 Thermal driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c new file mode 100644 index 000000000000..9ec27ac1856b --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c @@ -0,0 +1,295 @@ +/* + * int340x_thermal_zone.c + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include "int340x_thermal_zone.h" + +static int int340x_thermal_get_zone_temp(struct thermal_zone_device *zone, + int *temp) +{ + struct int34x_thermal_zone *d = zone->devdata; + unsigned long long tmp; + acpi_status status; + + if (d->override_ops && d->override_ops->get_temp) + return d->override_ops->get_temp(zone, temp); + + status = acpi_evaluate_integer(d->adev->handle, "_TMP", NULL, &tmp); + if (ACPI_FAILURE(status)) + return -EIO; + + if (d->lpat_table) { + int conv_temp; + + conv_temp = acpi_lpat_raw_to_temp(d->lpat_table, (int)tmp); + if (conv_temp < 0) + return conv_temp; + + *temp = (unsigned long)conv_temp * 10; + } else + /* _TMP returns the temperature in tenths of degrees Kelvin */ + *temp = DECI_KELVIN_TO_MILLICELSIUS(tmp); + + return 0; +} + +static int int340x_thermal_get_trip_temp(struct thermal_zone_device *zone, + int trip, int *temp) +{ + struct int34x_thermal_zone *d = zone->devdata; + int i; + + if (d->override_ops && d->override_ops->get_trip_temp) + return d->override_ops->get_trip_temp(zone, trip, temp); + + if (trip < d->aux_trip_nr) + *temp = d->aux_trips[trip]; + else if (trip == d->crt_trip_id) + *temp = d->crt_temp; + else if (trip == d->psv_trip_id) + *temp = d->psv_temp; + else if (trip == d->hot_trip_id) + *temp = d->hot_temp; + else { + for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) { + if (d->act_trips[i].valid && + d->act_trips[i].id == trip) { + *temp = d->act_trips[i].temp; + break; + } + } + if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT) + return -EINVAL; + } + + return 0; +} + +static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone, + int trip, + enum thermal_trip_type *type) +{ + struct int34x_thermal_zone *d = zone->devdata; + int i; + + if (d->override_ops && d->override_ops->get_trip_type) + return d->override_ops->get_trip_type(zone, trip, type); + + if (trip < d->aux_trip_nr) + *type = THERMAL_TRIP_PASSIVE; + else if (trip == d->crt_trip_id) + *type = THERMAL_TRIP_CRITICAL; + else if (trip == d->hot_trip_id) + *type = THERMAL_TRIP_HOT; + else if (trip == d->psv_trip_id) + *type = THERMAL_TRIP_PASSIVE; + else { + for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) { + if (d->act_trips[i].valid && + d->act_trips[i].id == trip) { + *type = THERMAL_TRIP_ACTIVE; + break; + } + } + if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT) + return -EINVAL; + } + + return 0; +} + +static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone, + int trip, int temp) +{ + struct int34x_thermal_zone *d = zone->devdata; + acpi_status status; + char name[10]; + + if (d->override_ops && d->override_ops->set_trip_temp) + return d->override_ops->set_trip_temp(zone, trip, temp); + + snprintf(name, sizeof(name), "PAT%d", trip); + status = acpi_execute_simple_method(d->adev->handle, name, + MILLICELSIUS_TO_DECI_KELVIN(temp)); + if (ACPI_FAILURE(status)) + return -EIO; + + d->aux_trips[trip] = temp; + + return 0; +} + + +static int int340x_thermal_get_trip_hyst(struct thermal_zone_device *zone, + int trip, int *temp) +{ + struct int34x_thermal_zone *d = zone->devdata; + acpi_status status; + unsigned long long hyst; + + if (d->override_ops && d->override_ops->get_trip_hyst) + return d->override_ops->get_trip_hyst(zone, trip, temp); + + status = acpi_evaluate_integer(d->adev->handle, "GTSH", NULL, &hyst); + if (ACPI_FAILURE(status)) + *temp = 0; + else + *temp = hyst * 100; + + return 0; +} + +static struct thermal_zone_device_ops int340x_thermal_zone_ops = { + .get_temp = int340x_thermal_get_zone_temp, + .get_trip_temp = int340x_thermal_get_trip_temp, + .get_trip_type = int340x_thermal_get_trip_type, + .set_trip_temp = int340x_thermal_set_trip_temp, + .get_trip_hyst = int340x_thermal_get_trip_hyst, +}; + +static int int340x_thermal_get_trip_config(acpi_handle handle, char *name, + int *temp) +{ + unsigned long long r; + acpi_status status; + + status = acpi_evaluate_integer(handle, name, NULL, &r); + if (ACPI_FAILURE(status)) + return -EIO; + + *temp = DECI_KELVIN_TO_MILLICELSIUS(r); + + return 0; +} + +int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone) +{ + int trip_cnt = int34x_zone->aux_trip_nr; + int i; + + int34x_zone->crt_trip_id = -1; + if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_CRT", + &int34x_zone->crt_temp)) + int34x_zone->crt_trip_id = trip_cnt++; + + int34x_zone->hot_trip_id = -1; + if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_HOT", + &int34x_zone->hot_temp)) + int34x_zone->hot_trip_id = trip_cnt++; + + int34x_zone->psv_trip_id = -1; + if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_PSV", + &int34x_zone->psv_temp)) + int34x_zone->psv_trip_id = trip_cnt++; + + for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) { + char name[5] = { '_', 'A', 'C', '0' + i, '\0' }; + + if (int340x_thermal_get_trip_config(int34x_zone->adev->handle, + name, + &int34x_zone->act_trips[i].temp)) + break; + + int34x_zone->act_trips[i].id = trip_cnt++; + int34x_zone->act_trips[i].valid = true; + } + + return trip_cnt; +} +EXPORT_SYMBOL_GPL(int340x_thermal_read_trips); + +static struct thermal_zone_params int340x_thermal_params = { + .governor_name = "user_space", + .no_hwmon = true, +}; + +struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev, + struct thermal_zone_device_ops *override_ops) +{ + struct int34x_thermal_zone *int34x_thermal_zone; + acpi_status status; + unsigned long long trip_cnt; + int trip_mask = 0; + int ret; + + int34x_thermal_zone = kzalloc(sizeof(*int34x_thermal_zone), + GFP_KERNEL); + if (!int34x_thermal_zone) + return ERR_PTR(-ENOMEM); + + int34x_thermal_zone->adev = adev; + int34x_thermal_zone->override_ops = override_ops; + + status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt); + if (ACPI_FAILURE(status)) + trip_cnt = 0; + else { + int34x_thermal_zone->aux_trips = + kcalloc(trip_cnt, + sizeof(*int34x_thermal_zone->aux_trips), + GFP_KERNEL); + if (!int34x_thermal_zone->aux_trips) { + ret = -ENOMEM; + goto err_trip_alloc; + } + trip_mask = BIT(trip_cnt) - 1; + int34x_thermal_zone->aux_trip_nr = trip_cnt; + } + + trip_cnt = int340x_thermal_read_trips(int34x_thermal_zone); + + int34x_thermal_zone->lpat_table = acpi_lpat_get_conversion_table( + adev->handle); + + int34x_thermal_zone->zone = thermal_zone_device_register( + acpi_device_bid(adev), + trip_cnt, + trip_mask, int34x_thermal_zone, + &int340x_thermal_zone_ops, + &int340x_thermal_params, + 0, 0); + if (IS_ERR(int34x_thermal_zone->zone)) { + ret = PTR_ERR(int34x_thermal_zone->zone); + goto err_thermal_zone; + } + + return int34x_thermal_zone; + +err_thermal_zone: + acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table); + kfree(int34x_thermal_zone->aux_trips); +err_trip_alloc: + kfree(int34x_thermal_zone); + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(int340x_thermal_zone_add); + +void int340x_thermal_zone_remove(struct int34x_thermal_zone + *int34x_thermal_zone) +{ + thermal_zone_device_unregister(int34x_thermal_zone->zone); + acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table); + kfree(int34x_thermal_zone->aux_trips); + kfree(int34x_thermal_zone); +} +EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove); + +MODULE_AUTHOR("Aaron Lu <aaron.lu@intel.com>"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_DESCRIPTION("Intel INT340x common thermal zone handler"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h new file mode 100644 index 000000000000..5f3ba4775c5c --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h @@ -0,0 +1,70 @@ +/* + * int340x_thermal_zone.h + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#ifndef __INT340X_THERMAL_ZONE_H__ +#define __INT340X_THERMAL_ZONE_H__ + +#include <acpi/acpi_lpat.h> + +#define INT340X_THERMAL_MAX_ACT_TRIP_COUNT 10 + +struct active_trip { + int temp; + int id; + bool valid; +}; + +struct int34x_thermal_zone { + struct acpi_device *adev; + struct active_trip act_trips[INT340X_THERMAL_MAX_ACT_TRIP_COUNT]; + unsigned long *aux_trips; + int aux_trip_nr; + int psv_temp; + int psv_trip_id; + int crt_temp; + int crt_trip_id; + int hot_temp; + int hot_trip_id; + struct thermal_zone_device *zone; + struct thermal_zone_device_ops *override_ops; + void *priv_data; + struct acpi_lpat_conversion_table *lpat_table; +}; + +struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *, + struct thermal_zone_device_ops *override_ops); +void int340x_thermal_zone_remove(struct int34x_thermal_zone *); +int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone); + +static inline void int340x_thermal_zone_set_priv_data( + struct int34x_thermal_zone *tzone, void *priv_data) +{ + tzone->priv_data = priv_data; +} + +static inline void *int340x_thermal_zone_get_priv_data( + struct int34x_thermal_zone *tzone) +{ + return tzone->priv_data; +} + +static inline void int340x_thermal_zone_device_update( + struct int34x_thermal_zone *tzone, + enum thermal_notify_event event) +{ + thermal_zone_device_update(tzone->zone, event); +} + +#endif diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c new file mode 100644 index 000000000000..284cf2c5a8fd --- /dev/null +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c @@ -0,0 +1,525 @@ +/* + * processor_thermal_device.c + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include "int340x_thermal_zone.h" +#include "../intel_soc_dts_iosf.h" + +/* Broadwell-U/HSB thermal reporting device */ +#define PCI_DEVICE_ID_PROC_BDW_THERMAL 0x1603 +#define PCI_DEVICE_ID_PROC_HSB_THERMAL 0x0A03 + +/* Skylake thermal reporting device */ +#define PCI_DEVICE_ID_PROC_SKL_THERMAL 0x1903 + +/* CannonLake thermal reporting device */ +#define PCI_DEVICE_ID_PROC_CNL_THERMAL 0x5a03 +#define PCI_DEVICE_ID_PROC_CFL_THERMAL 0x3E83 + +/* Braswell thermal reporting device */ +#define PCI_DEVICE_ID_PROC_BSW_THERMAL 0x22DC + +/* Broxton thermal reporting device */ +#define PCI_DEVICE_ID_PROC_BXT0_THERMAL 0x0A8C +#define PCI_DEVICE_ID_PROC_BXT1_THERMAL 0x1A8C +#define PCI_DEVICE_ID_PROC_BXTX_THERMAL 0x4A8C +#define PCI_DEVICE_ID_PROC_BXTP_THERMAL 0x5A8C + +/* GeminiLake thermal reporting device */ +#define PCI_DEVICE_ID_PROC_GLK_THERMAL 0x318C + +struct power_config { + u32 index; + u32 min_uw; + u32 max_uw; + u32 tmin_us; + u32 tmax_us; + u32 step_uw; +}; + +struct proc_thermal_device { + struct device *dev; + struct acpi_device *adev; + struct power_config power_limits[2]; + struct int34x_thermal_zone *int340x_zone; + struct intel_soc_dts_sensors *soc_dts; +}; + +enum proc_thermal_emum_mode_type { + PROC_THERMAL_NONE, + PROC_THERMAL_PCI, + PROC_THERMAL_PLATFORM_DEV +}; + +/* + * We can have only one type of enumeration, PCI or Platform, + * not both. So we don't need instance specific data. + */ +static enum proc_thermal_emum_mode_type proc_thermal_emum_mode = + PROC_THERMAL_NONE; + +#define POWER_LIMIT_SHOW(index, suffix) \ +static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + struct pci_dev *pci_dev; \ + struct platform_device *pdev; \ + struct proc_thermal_device *proc_dev; \ +\ + if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \ + pdev = to_platform_device(dev); \ + proc_dev = platform_get_drvdata(pdev); \ + } else { \ + pci_dev = to_pci_dev(dev); \ + proc_dev = pci_get_drvdata(pci_dev); \ + } \ + return sprintf(buf, "%lu\n",\ + (unsigned long)proc_dev->power_limits[index].suffix * 1000); \ +} + +POWER_LIMIT_SHOW(0, min_uw) +POWER_LIMIT_SHOW(0, max_uw) +POWER_LIMIT_SHOW(0, step_uw) +POWER_LIMIT_SHOW(0, tmin_us) +POWER_LIMIT_SHOW(0, tmax_us) + +POWER_LIMIT_SHOW(1, min_uw) +POWER_LIMIT_SHOW(1, max_uw) +POWER_LIMIT_SHOW(1, step_uw) +POWER_LIMIT_SHOW(1, tmin_us) +POWER_LIMIT_SHOW(1, tmax_us) + +static DEVICE_ATTR_RO(power_limit_0_min_uw); +static DEVICE_ATTR_RO(power_limit_0_max_uw); +static DEVICE_ATTR_RO(power_limit_0_step_uw); +static DEVICE_ATTR_RO(power_limit_0_tmin_us); +static DEVICE_ATTR_RO(power_limit_0_tmax_us); + +static DEVICE_ATTR_RO(power_limit_1_min_uw); +static DEVICE_ATTR_RO(power_limit_1_max_uw); +static DEVICE_ATTR_RO(power_limit_1_step_uw); +static DEVICE_ATTR_RO(power_limit_1_tmin_us); +static DEVICE_ATTR_RO(power_limit_1_tmax_us); + +static struct attribute *power_limit_attrs[] = { + &dev_attr_power_limit_0_min_uw.attr, + &dev_attr_power_limit_1_min_uw.attr, + &dev_attr_power_limit_0_max_uw.attr, + &dev_attr_power_limit_1_max_uw.attr, + &dev_attr_power_limit_0_step_uw.attr, + &dev_attr_power_limit_1_step_uw.attr, + &dev_attr_power_limit_0_tmin_us.attr, + &dev_attr_power_limit_1_tmin_us.attr, + &dev_attr_power_limit_0_tmax_us.attr, + &dev_attr_power_limit_1_tmax_us.attr, + NULL +}; + +static const struct attribute_group power_limit_attribute_group = { + .attrs = power_limit_attrs, + .name = "power_limits" +}; + +static int stored_tjmax; /* since it is fixed, we can have local storage */ + +static int get_tjmax(void) +{ + u32 eax, edx; + u32 val; + int err; + + err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); + if (err) + return err; + + val = (eax >> 16) & 0xff; + if (val) + return val; + + return -EINVAL; +} + +static int read_temp_msr(int *temp) +{ + int cpu; + u32 eax, edx; + int err; + unsigned long curr_temp_off = 0; + + *temp = 0; + + for_each_online_cpu(cpu) { + err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax, + &edx); + if (err) + goto err_ret; + else { + if (eax & 0x80000000) { + curr_temp_off = (eax >> 16) & 0x7f; + if (!*temp || curr_temp_off < *temp) + *temp = curr_temp_off; + } else { + err = -EINVAL; + goto err_ret; + } + } + } + + return 0; +err_ret: + return err; +} + +static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone, + int *temp) +{ + int ret; + + ret = read_temp_msr(temp); + if (!ret) + *temp = (stored_tjmax - *temp) * 1000; + + return ret; +} + +static struct thermal_zone_device_ops proc_thermal_local_ops = { + .get_temp = proc_thermal_get_zone_temp, +}; + +static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv) +{ + int i; + acpi_status status; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *elements, *ppcc; + union acpi_object *p; + int ret = 0; + + status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC", + NULL, &buf); + if (ACPI_FAILURE(status)) + return -ENODEV; + + p = buf.pointer; + if (!p || (p->type != ACPI_TYPE_PACKAGE)) { + dev_err(proc_priv->dev, "Invalid PPCC data\n"); + ret = -EFAULT; + goto free_buffer; + } + + if (!p->package.count) { + dev_err(proc_priv->dev, "Invalid PPCC package size\n"); + ret = -EFAULT; + goto free_buffer; + } + + for (i = 0; i < min((int)p->package.count - 1, 2); ++i) { + elements = &(p->package.elements[i+1]); + if (elements->type != ACPI_TYPE_PACKAGE || + elements->package.count != 6) { + ret = -EFAULT; + goto free_buffer; + } + ppcc = elements->package.elements; + proc_priv->power_limits[i].index = ppcc[0].integer.value; + proc_priv->power_limits[i].min_uw = ppcc[1].integer.value; + proc_priv->power_limits[i].max_uw = ppcc[2].integer.value; + proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value; + proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value; + proc_priv->power_limits[i].step_uw = ppcc[5].integer.value; + } + +free_buffer: + kfree(buf.pointer); + + return ret; +} + +#define PROC_POWER_CAPABILITY_CHANGED 0x83 +static void proc_thermal_notify(acpi_handle handle, u32 event, void *data) +{ + struct proc_thermal_device *proc_priv = data; + + if (!proc_priv) + return; + + switch (event) { + case PROC_POWER_CAPABILITY_CHANGED: + proc_thermal_read_ppcc(proc_priv); + int340x_thermal_zone_device_update(proc_priv->int340x_zone, + THERMAL_DEVICE_POWER_CAPABILITY_CHANGED); + break; + default: + dev_err(proc_priv->dev, "Unsupported event [0x%x]\n", event); + break; + } +} + + +static int proc_thermal_add(struct device *dev, + struct proc_thermal_device **priv) +{ + struct proc_thermal_device *proc_priv; + struct acpi_device *adev; + acpi_status status; + unsigned long long tmp; + struct thermal_zone_device_ops *ops = NULL; + int ret; + + adev = ACPI_COMPANION(dev); + if (!adev) + return -ENODEV; + + proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL); + if (!proc_priv) + return -ENOMEM; + + proc_priv->dev = dev; + proc_priv->adev = adev; + *priv = proc_priv; + + ret = proc_thermal_read_ppcc(proc_priv); + if (!ret) { + ret = sysfs_create_group(&dev->kobj, + &power_limit_attribute_group); + + } + if (ret) + return ret; + + status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp); + if (ACPI_FAILURE(status)) { + /* there is no _TMP method, add local method */ + stored_tjmax = get_tjmax(); + if (stored_tjmax > 0) + ops = &proc_thermal_local_ops; + } + + proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops); + if (IS_ERR(proc_priv->int340x_zone)) { + ret = PTR_ERR(proc_priv->int340x_zone); + goto remove_group; + } else + ret = 0; + + ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY, + proc_thermal_notify, + (void *)proc_priv); + if (ret) + goto remove_zone; + + return 0; + +remove_zone: + int340x_thermal_zone_remove(proc_priv->int340x_zone); +remove_group: + sysfs_remove_group(&proc_priv->dev->kobj, + &power_limit_attribute_group); + + return ret; +} + +static void proc_thermal_remove(struct proc_thermal_device *proc_priv) +{ + acpi_remove_notify_handler(proc_priv->adev->handle, + ACPI_DEVICE_NOTIFY, proc_thermal_notify); + int340x_thermal_zone_remove(proc_priv->int340x_zone); + sysfs_remove_group(&proc_priv->dev->kobj, + &power_limit_attribute_group); +} + +static int int3401_add(struct platform_device *pdev) +{ + struct proc_thermal_device *proc_priv; + int ret; + + if (proc_thermal_emum_mode == PROC_THERMAL_PCI) { + dev_err(&pdev->dev, "error: enumerated as PCI dev\n"); + return -ENODEV; + } + + ret = proc_thermal_add(&pdev->dev, &proc_priv); + if (ret) + return ret; + + platform_set_drvdata(pdev, proc_priv); + proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV; + + return 0; +} + +static int int3401_remove(struct platform_device *pdev) +{ + proc_thermal_remove(platform_get_drvdata(pdev)); + + return 0; +} + +static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid) +{ + struct proc_thermal_device *proc_priv; + struct pci_dev *pdev = devid; + + proc_priv = pci_get_drvdata(pdev); + + intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts); + + return IRQ_HANDLED; +} + +static int proc_thermal_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *unused) +{ + struct proc_thermal_device *proc_priv; + int ret; + + if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { + dev_err(&pdev->dev, "error: enumerated as platform dev\n"); + return -ENODEV; + } + + ret = pci_enable_device(pdev); + if (ret < 0) { + dev_err(&pdev->dev, "error: could not enable device\n"); + return ret; + } + + ret = proc_thermal_add(&pdev->dev, &proc_priv); + if (ret) { + pci_disable_device(pdev); + return ret; + } + + pci_set_drvdata(pdev, proc_priv); + proc_thermal_emum_mode = PROC_THERMAL_PCI; + + if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) { + /* + * Enumerate additional DTS sensors available via IOSF. + * But we are not treating as a failure condition, if + * there are no aux DTSs enabled or fails. This driver + * already exposes sensors, which can be accessed via + * ACPI/MSR. So we don't want to fail for auxiliary DTSs. + */ + proc_priv->soc_dts = intel_soc_dts_iosf_init( + INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0); + + if (proc_priv->soc_dts && pdev->irq) { + ret = pci_enable_msi(pdev); + if (!ret) { + ret = request_threaded_irq(pdev->irq, NULL, + proc_thermal_pci_msi_irq, + IRQF_ONESHOT, "proc_thermal", + pdev); + if (ret) { + intel_soc_dts_iosf_exit( + proc_priv->soc_dts); + pci_disable_msi(pdev); + proc_priv->soc_dts = NULL; + } + } + } else + dev_err(&pdev->dev, "No auxiliary DTSs enabled\n"); + } + + return 0; +} + +static void proc_thermal_pci_remove(struct pci_dev *pdev) +{ + struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev); + + if (proc_priv->soc_dts) { + intel_soc_dts_iosf_exit(proc_priv->soc_dts); + if (pdev->irq) { + free_irq(pdev->irq, pdev); + pci_disable_msi(pdev); + } + } + proc_thermal_remove(proc_priv); + pci_disable_device(pdev); +} + +static const struct pci_device_id proc_thermal_pci_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BDW_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_HSB_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_SKL_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BSW_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT0_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT1_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTX_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTP_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CNL_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_CFL_THERMAL)}, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_GLK_THERMAL)}, + { 0, }, +}; + +MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids); + +static struct pci_driver proc_thermal_pci_driver = { + .name = "proc_thermal", + .probe = proc_thermal_pci_probe, + .remove = proc_thermal_pci_remove, + .id_table = proc_thermal_pci_ids, +}; + +static const struct acpi_device_id int3401_device_ids[] = { + {"INT3401", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, int3401_device_ids); + +static struct platform_driver int3401_driver = { + .probe = int3401_add, + .remove = int3401_remove, + .driver = { + .name = "int3401 thermal", + .acpi_match_table = int3401_device_ids, + }, +}; + +static int __init proc_thermal_init(void) +{ + int ret; + + ret = platform_driver_register(&int3401_driver); + if (ret) + return ret; + + ret = pci_register_driver(&proc_thermal_pci_driver); + + return ret; +} + +static void __exit proc_thermal_exit(void) +{ + platform_driver_unregister(&int3401_driver); + pci_unregister_driver(&proc_thermal_pci_driver); +} + +module_init(proc_thermal_init); +module_exit(proc_thermal_exit); + +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/intel_bxt_pmic_thermal.c b/drivers/thermal/intel/intel_bxt_pmic_thermal.c new file mode 100644 index 000000000000..94cfd0064c43 --- /dev/null +++ b/drivers/thermal/intel/intel_bxt_pmic_thermal.c @@ -0,0 +1,299 @@ +/* + * Intel Broxton PMIC thermal driver + * + * Copyright (C) 2016 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/thermal.h> +#include <linux/platform_device.h> +#include <linux/sched.h> +#include <linux/mfd/intel_soc_pmic.h> + +#define BXTWC_THRM0IRQ 0x4E04 +#define BXTWC_THRM1IRQ 0x4E05 +#define BXTWC_THRM2IRQ 0x4E06 +#define BXTWC_MTHRM0IRQ 0x4E12 +#define BXTWC_MTHRM1IRQ 0x4E13 +#define BXTWC_MTHRM2IRQ 0x4E14 +#define BXTWC_STHRM0IRQ 0x4F19 +#define BXTWC_STHRM1IRQ 0x4F1A +#define BXTWC_STHRM2IRQ 0x4F1B + +struct trip_config_map { + u16 irq_reg; + u16 irq_en; + u16 evt_stat; + u8 irq_mask; + u8 irq_en_mask; + u8 evt_mask; + u8 trip_num; +}; + +struct thermal_irq_map { + char handle[20]; + int num_trips; + const struct trip_config_map *trip_config; +}; + +struct pmic_thermal_data { + const struct thermal_irq_map *maps; + int num_maps; +}; + +static const struct trip_config_map bxtwc_str0_trip_config[] = { + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x01, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x01, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x01, + .trip_num = 0 + }, + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x10, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x10, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x10, + .trip_num = 1 + } +}; + +static const struct trip_config_map bxtwc_str1_trip_config[] = { + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x02, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x02, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x02, + .trip_num = 0 + }, + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x20, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x20, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x20, + .trip_num = 1 + }, +}; + +static const struct trip_config_map bxtwc_str2_trip_config[] = { + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x04, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x04, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x04, + .trip_num = 0 + }, + { + .irq_reg = BXTWC_THRM0IRQ, + .irq_mask = 0x40, + .irq_en = BXTWC_MTHRM0IRQ, + .irq_en_mask = 0x40, + .evt_stat = BXTWC_STHRM0IRQ, + .evt_mask = 0x40, + .trip_num = 1 + }, +}; + +static const struct trip_config_map bxtwc_str3_trip_config[] = { + { + .irq_reg = BXTWC_THRM2IRQ, + .irq_mask = 0x10, + .irq_en = BXTWC_MTHRM2IRQ, + .irq_en_mask = 0x10, + .evt_stat = BXTWC_STHRM2IRQ, + .evt_mask = 0x10, + .trip_num = 0 + }, +}; + +static const struct thermal_irq_map bxtwc_thermal_irq_map[] = { + { + .handle = "STR0", + .trip_config = bxtwc_str0_trip_config, + .num_trips = ARRAY_SIZE(bxtwc_str0_trip_config), + }, + { + .handle = "STR1", + .trip_config = bxtwc_str1_trip_config, + .num_trips = ARRAY_SIZE(bxtwc_str1_trip_config), + }, + { + .handle = "STR2", + .trip_config = bxtwc_str2_trip_config, + .num_trips = ARRAY_SIZE(bxtwc_str2_trip_config), + }, + { + .handle = "STR3", + .trip_config = bxtwc_str3_trip_config, + .num_trips = ARRAY_SIZE(bxtwc_str3_trip_config), + }, +}; + +static const struct pmic_thermal_data bxtwc_thermal_data = { + .maps = bxtwc_thermal_irq_map, + .num_maps = ARRAY_SIZE(bxtwc_thermal_irq_map), +}; + +static irqreturn_t pmic_thermal_irq_handler(int irq, void *data) +{ + struct platform_device *pdev = data; + struct thermal_zone_device *tzd; + struct pmic_thermal_data *td; + struct intel_soc_pmic *pmic; + struct regmap *regmap; + u8 reg_val, mask, irq_stat; + u16 reg, evt_stat_reg; + int i, j, ret; + + pmic = dev_get_drvdata(pdev->dev.parent); + regmap = pmic->regmap; + td = (struct pmic_thermal_data *) + platform_get_device_id(pdev)->driver_data; + + /* Resolve thermal irqs */ + for (i = 0; i < td->num_maps; i++) { + for (j = 0; j < td->maps[i].num_trips; j++) { + reg = td->maps[i].trip_config[j].irq_reg; + mask = td->maps[i].trip_config[j].irq_mask; + /* + * Read the irq register to resolve whether the + * interrupt was triggered for this sensor + */ + if (regmap_read(regmap, reg, &ret)) + return IRQ_HANDLED; + + reg_val = (u8)ret; + irq_stat = ((u8)ret & mask); + + if (!irq_stat) + continue; + + /* + * Read the status register to find out what + * event occurred i.e a high or a low + */ + evt_stat_reg = td->maps[i].trip_config[j].evt_stat; + if (regmap_read(regmap, evt_stat_reg, &ret)) + return IRQ_HANDLED; + + tzd = thermal_zone_get_zone_by_name(td->maps[i].handle); + if (!IS_ERR(tzd)) + thermal_zone_device_update(tzd, + THERMAL_EVENT_UNSPECIFIED); + + /* Clear the appropriate irq */ + regmap_write(regmap, reg, reg_val & mask); + } + } + + return IRQ_HANDLED; +} + +static int pmic_thermal_probe(struct platform_device *pdev) +{ + struct regmap_irq_chip_data *regmap_irq_chip; + struct pmic_thermal_data *thermal_data; + int ret, irq, virq, i, j, pmic_irq_count; + struct intel_soc_pmic *pmic; + struct regmap *regmap; + struct device *dev; + u16 reg; + u8 mask; + + dev = &pdev->dev; + pmic = dev_get_drvdata(pdev->dev.parent); + if (!pmic) { + dev_err(dev, "Failed to get struct intel_soc_pmic pointer\n"); + return -ENODEV; + } + + thermal_data = (struct pmic_thermal_data *) + platform_get_device_id(pdev)->driver_data; + if (!thermal_data) { + dev_err(dev, "No thermal data initialized!!\n"); + return -ENODEV; + } + + regmap = pmic->regmap; + regmap_irq_chip = pmic->irq_chip_data; + + pmic_irq_count = 0; + while ((irq = platform_get_irq(pdev, pmic_irq_count)) != -ENXIO) { + virq = regmap_irq_get_virq(regmap_irq_chip, irq); + if (virq < 0) { + dev_err(dev, "failed to get virq by irq %d\n", irq); + return virq; + } + + ret = devm_request_threaded_irq(&pdev->dev, virq, + NULL, pmic_thermal_irq_handler, + IRQF_ONESHOT, "pmic_thermal", pdev); + + if (ret) { + dev_err(dev, "request irq(%d) failed: %d\n", virq, ret); + return ret; + } + pmic_irq_count++; + } + + /* Enable thermal interrupts */ + for (i = 0; i < thermal_data->num_maps; i++) { + for (j = 0; j < thermal_data->maps[i].num_trips; j++) { + reg = thermal_data->maps[i].trip_config[j].irq_en; + mask = thermal_data->maps[i].trip_config[j].irq_en_mask; + ret = regmap_update_bits(regmap, reg, mask, 0x00); + if (ret) + return ret; + } + } + + return 0; +} + +static const struct platform_device_id pmic_thermal_id_table[] = { + { + .name = "bxt_wcove_thermal", + .driver_data = (kernel_ulong_t)&bxtwc_thermal_data, + }, + {}, +}; + +static struct platform_driver pmic_thermal_driver = { + .probe = pmic_thermal_probe, + .driver = { + .name = "pmic_thermal", + }, + .id_table = pmic_thermal_id_table, +}; + +MODULE_DEVICE_TABLE(platform, pmic_thermal_id_table); +module_platform_driver(pmic_thermal_driver); + +MODULE_AUTHOR("Yegnesh S Iyer <yegnesh.s.iyer@intel.com>"); +MODULE_DESCRIPTION("Intel Broxton PMIC Thermal Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/intel_pch_thermal.c b/drivers/thermal/intel/intel_pch_thermal.c new file mode 100644 index 000000000000..8a7f69b4b022 --- /dev/null +++ b/drivers/thermal/intel/intel_pch_thermal.c @@ -0,0 +1,432 @@ +/* intel_pch_thermal.c - Intel PCH Thermal driver + * + * Copyright (c) 2015, Intel Corporation. + * + * Authors: + * Tushar Dave <tushar.n.dave@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/acpi.h> +#include <linux/thermal.h> +#include <linux/pm.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 */ + +/* 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_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 */ + +static char driver_name[] = "Intel PCH thermal driver"; + +struct pch_thermal_device { + void __iomem *hw_base; + const struct pch_dev_ops *ops; + struct pci_dev *pdev; + struct thermal_zone_device *tzd; + int crt_trip_id; + unsigned long crt_temp; + int hot_trip_id; + unsigned long hot_temp; + int psv_trip_id; + unsigned long psv_temp; + 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 void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, + int *nr_trips) +{ + struct acpi_device *adev; + + ptd->psv_trip_id = -1; + + adev = ACPI_COMPANION(&ptd->pdev->dev); + if (adev) { + unsigned long long r; + acpi_status status; + + status = acpi_evaluate_integer(adev->handle, "_PSV", NULL, + &r); + if (ACPI_SUCCESS(status)) { + unsigned long trip_temp; + + trip_temp = DECI_KELVIN_TO_MILLICELSIUS(r); + if (trip_temp) { + ptd->psv_temp = trip_temp; + ptd->psv_trip_id = *nr_trips; + ++(*nr_trips); + } + } + } +} +#else +static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd, + int *nr_trips) +{ + ptd->psv_trip_id = -1; + +} +#endif + +static int pch_wpt_init(struct pch_thermal_device *ptd, int *nr_trips) +{ + u8 tsel; + u16 trip_temp; + + *nr_trips = 0; + + /* 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"); + return -ENODEV; + } + + 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"); + return -ENODEV; + } + +read_trips: + ptd->crt_trip_id = -1; + trip_temp = readw(ptd->hw_base + WPT_CTT); + trip_temp &= 0x1FF; + if (trip_temp) { + /* Resolution of 1/2 degree C and an offset of -50C */ + ptd->crt_temp = trip_temp * 1000 / 2 - 50000; + ptd->crt_trip_id = 0; + ++(*nr_trips); + } + + ptd->hot_trip_id = -1; + trip_temp = readw(ptd->hw_base + WPT_PHL); + trip_temp &= 0x1FF; + if (trip_temp) { + /* Resolution of 1/2 degree C and an offset of -50C */ + ptd->hot_temp = trip_temp * 1000 / 2 - 50000; + ptd->hot_trip_id = *nr_trips; + ++(*nr_trips); + } + + pch_wpt_add_acpi_psv_trip(ptd, nr_trips); + + return 0; +} + +static int pch_wpt_get_temp(struct pch_thermal_device *ptd, int *temp) +{ + u16 wpt_temp; + + wpt_temp = WPT_TEMP_TSR & readw(ptd->hw_base + WPT_TEMP); + + /* Resolution of 1/2 degree C and an offset of -50C */ + *temp = (wpt_temp * 1000 / 2 - 50000); + + return 0; +} + +static int pch_wpt_suspend(struct pch_thermal_device *ptd) +{ + u8 tsel; + + if (ptd->bios_enabled) + return 0; + + tsel = readb(ptd->hw_base + WPT_TSEL); + + writeb(tsel & 0xFE, ptd->hw_base + WPT_TSEL); + + return 0; +} + +static int pch_wpt_resume(struct pch_thermal_device *ptd) +{ + 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; +} + +struct pch_dev_ops { + int (*hw_init)(struct pch_thermal_device *ptd, int *nr_trips); + int (*get_temp)(struct pch_thermal_device *ptd, int *temp); + int (*suspend)(struct pch_thermal_device *ptd); + int (*resume)(struct pch_thermal_device *ptd); +}; + + +/* dev ops for Wildcat Point */ +static const struct pch_dev_ops pch_dev_ops_wpt = { + .hw_init = pch_wpt_init, + .get_temp = pch_wpt_get_temp, + .suspend = pch_wpt_suspend, + .resume = pch_wpt_resume, +}; + +static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp) +{ + struct pch_thermal_device *ptd = tzd->devdata; + + return ptd->ops->get_temp(ptd, temp); +} + +static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip, + enum thermal_trip_type *type) +{ + struct pch_thermal_device *ptd = tzd->devdata; + + if (ptd->crt_trip_id == trip) + *type = THERMAL_TRIP_CRITICAL; + else if (ptd->hot_trip_id == trip) + *type = THERMAL_TRIP_HOT; + else if (ptd->psv_trip_id == trip) + *type = THERMAL_TRIP_PASSIVE; + else + return -EINVAL; + + return 0; +} + +static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip, int *temp) +{ + struct pch_thermal_device *ptd = tzd->devdata; + + if (ptd->crt_trip_id == trip) + *temp = ptd->crt_temp; + else if (ptd->hot_trip_id == trip) + *temp = ptd->hot_temp; + else if (ptd->psv_trip_id == trip) + *temp = ptd->psv_temp; + else + return -EINVAL; + + return 0; +} + +static struct thermal_zone_device_ops tzd_ops = { + .get_temp = pch_thermal_get_temp, + .get_trip_type = pch_get_trip_type, + .get_trip_temp = pch_get_trip_temp, +}; + +enum board_ids { + board_hsw, + board_wpt, + board_skl, + board_cnl, +}; + +static const struct board_info { + const char *name; + const struct pch_dev_ops *ops; +} board_info[] = { + [board_hsw] = { + .name = "pch_haswell", + .ops = &pch_dev_ops_wpt, + }, + [board_wpt] = { + .name = "pch_wildcat_point", + .ops = &pch_dev_ops_wpt, + }, + [board_skl] = { + .name = "pch_skylake", + .ops = &pch_dev_ops_wpt, + }, + [board_cnl] = { + .name = "pch_cannonlake", + .ops = &pch_dev_ops_wpt, + }, +}; + +static int intel_pch_thermal_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + enum board_ids board_id = id->driver_data; + const struct board_info *bi = &board_info[board_id]; + struct pch_thermal_device *ptd; + int err; + int nr_trips; + + ptd = devm_kzalloc(&pdev->dev, sizeof(*ptd), GFP_KERNEL); + if (!ptd) + return -ENOMEM; + + ptd->ops = bi->ops; + + 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; + } + + err = ptd->ops->hw_init(ptd, &nr_trips); + if (err) + goto error_cleanup; + + ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd, + &tzd_ops, NULL, 0, 0); + if (IS_ERR(ptd->tzd)) { + dev_err(&pdev->dev, "Failed to register thermal zone %s\n", + bi->name); + err = PTR_ERR(ptd->tzd); + goto error_cleanup; + } + + return 0; + +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_region(pdev, 0); + pci_disable_device(pdev); +} + +static int intel_pch_thermal_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct pch_thermal_device *ptd = pci_get_drvdata(pdev); + + return ptd->ops->suspend(ptd); +} + +static int intel_pch_thermal_resume(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct pch_thermal_device *ptd = pci_get_drvdata(pdev); + + return ptd->ops->resume(ptd); +} + +static const struct pci_device_id intel_pch_thermal_id[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_1), + .driver_data = board_hsw, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_HSW_2), + .driver_data = board_hsw, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_WPT), + .driver_data = board_wpt, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL), + .driver_data = board_skl, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_SKL_H), + .driver_data = board_skl, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL), + .driver_data = board_cnl, }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCH_THERMAL_DID_CNL_H), + .driver_data = board_cnl, }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, intel_pch_thermal_id); + +static const struct dev_pm_ops intel_pch_pm_ops = { + .suspend = intel_pch_thermal_suspend, + .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"); diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c new file mode 100644 index 000000000000..7571f7c2e7c9 --- /dev/null +++ b/drivers/thermal/intel/intel_powerclamp.c @@ -0,0 +1,803 @@ +/* + * intel_powerclamp.c - package c-state idle injection + * + * Copyright (c) 2012, Intel Corporation. + * + * Authors: + * Arjan van de Ven <arjan@linux.intel.com> + * Jacob Pan <jacob.jun.pan@linux.intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + * + * TODO: + * 1. better handle wakeup from external interrupts, currently a fixed + * compensation is added to clamping duration when excessive amount + * of wakeups are observed during idle time. the reason is that in + * case of external interrupts without need for ack, clamping down + * cpu in non-irq context does not reduce irq. for majority of the + * cases, clamping down cpu does help reduce irq as well, we should + * be able to differentiate the two cases and give a quantitative + * solution for the irqs that we can control. perhaps based on + * get_cpu_iowait_time_us() + * + * 2. synchronization with other hw blocks + * + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/kthread.h> +#include <linux/cpu.h> +#include <linux/thermal.h> +#include <linux/slab.h> +#include <linux/tick.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/sched/rt.h> +#include <uapi/linux/sched/types.h> + +#include <asm/nmi.h> +#include <asm/msr.h> +#include <asm/mwait.h> +#include <asm/cpu_device_id.h> +#include <asm/hardirq.h> + +#define MAX_TARGET_RATIO (50U) +/* For each undisturbed clamping period (no extra wake ups during idle time), + * we increment the confidence counter for the given target ratio. + * CONFIDENCE_OK defines the level where runtime calibration results are + * valid. + */ +#define CONFIDENCE_OK (3) +/* Default idle injection duration, driver adjust sleep time to meet target + * idle ratio. Similar to frequency modulation. + */ +#define DEFAULT_DURATION_JIFFIES (6) + +static unsigned int target_mwait; +static struct dentry *debug_dir; + +/* user selected target */ +static unsigned int set_target_ratio; +static unsigned int current_ratio; +static bool should_skip; +static bool reduce_irq; +static atomic_t idle_wakeup_counter; +static unsigned int control_cpu; /* The cpu assigned to collect stat and update + * control parameters. default to BSP but BSP + * can be offlined. + */ +static bool clamping; + +static const struct sched_param sparam = { + .sched_priority = MAX_USER_RT_PRIO / 2, +}; +struct powerclamp_worker_data { + struct kthread_worker *worker; + struct kthread_work balancing_work; + struct kthread_delayed_work idle_injection_work; + unsigned int cpu; + unsigned int count; + unsigned int guard; + unsigned int window_size_now; + unsigned int target_ratio; + unsigned int duration_jiffies; + bool clamping; +}; + +static struct powerclamp_worker_data * __percpu worker_data; +static struct thermal_cooling_device *cooling_dev; +static unsigned long *cpu_clamping_mask; /* bit map for tracking per cpu + * clamping kthread worker + */ + +static unsigned int duration; +static unsigned int pkg_cstate_ratio_cur; +static unsigned int window_size; + +static int duration_set(const char *arg, const struct kernel_param *kp) +{ + int ret = 0; + unsigned long new_duration; + + ret = kstrtoul(arg, 10, &new_duration); + if (ret) + goto exit; + if (new_duration > 25 || new_duration < 6) { + pr_err("Out of recommended range %lu, between 6-25ms\n", + new_duration); + ret = -EINVAL; + } + + duration = clamp(new_duration, 6ul, 25ul); + smp_mb(); + +exit: + + return ret; +} + +static const struct kernel_param_ops duration_ops = { + .set = duration_set, + .get = param_get_int, +}; + + +module_param_cb(duration, &duration_ops, &duration, 0644); +MODULE_PARM_DESC(duration, "forced idle time for each attempt in msec."); + +struct powerclamp_calibration_data { + unsigned long confidence; /* used for calibration, basically a counter + * gets incremented each time a clamping + * period is completed without extra wakeups + * once that counter is reached given level, + * compensation is deemed usable. + */ + unsigned long steady_comp; /* steady state compensation used when + * no extra wakeups occurred. + */ + unsigned long dynamic_comp; /* compensate excessive wakeup from idle + * mostly from external interrupts. + */ +}; + +static struct powerclamp_calibration_data cal_data[MAX_TARGET_RATIO]; + +static int window_size_set(const char *arg, const struct kernel_param *kp) +{ + int ret = 0; + unsigned long new_window_size; + + ret = kstrtoul(arg, 10, &new_window_size); + if (ret) + goto exit_win; + if (new_window_size > 10 || new_window_size < 2) { + pr_err("Out of recommended window size %lu, between 2-10\n", + new_window_size); + ret = -EINVAL; + } + + window_size = clamp(new_window_size, 2ul, 10ul); + smp_mb(); + +exit_win: + + return ret; +} + +static const struct kernel_param_ops window_size_ops = { + .set = window_size_set, + .get = param_get_int, +}; + +module_param_cb(window_size, &window_size_ops, &window_size, 0644); +MODULE_PARM_DESC(window_size, "sliding window in number of clamping cycles\n" + "\tpowerclamp controls idle ratio within this window. larger\n" + "\twindow size results in slower response time but more smooth\n" + "\tclamping results. default to 2."); + +static void find_target_mwait(void) +{ + unsigned int eax, ebx, ecx, edx; + unsigned int highest_cstate = 0; + unsigned int highest_subcstate = 0; + int i; + + if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) + return; + + cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &edx); + + if (!(ecx & CPUID5_ECX_EXTENSIONS_SUPPORTED) || + !(ecx & CPUID5_ECX_INTERRUPT_BREAK)) + return; + + edx >>= MWAIT_SUBSTATE_SIZE; + for (i = 0; i < 7 && edx; i++, edx >>= MWAIT_SUBSTATE_SIZE) { + if (edx & MWAIT_SUBSTATE_MASK) { + highest_cstate = i; + highest_subcstate = edx & MWAIT_SUBSTATE_MASK; + } + } + target_mwait = (highest_cstate << MWAIT_SUBSTATE_SIZE) | + (highest_subcstate - 1); + +} + +struct pkg_cstate_info { + bool skip; + int msr_index; + int cstate_id; +}; + +#define PKG_CSTATE_INIT(id) { \ + .msr_index = MSR_PKG_C##id##_RESIDENCY, \ + .cstate_id = id \ + } + +static struct pkg_cstate_info pkg_cstates[] = { + PKG_CSTATE_INIT(2), + PKG_CSTATE_INIT(3), + PKG_CSTATE_INIT(6), + PKG_CSTATE_INIT(7), + PKG_CSTATE_INIT(8), + PKG_CSTATE_INIT(9), + PKG_CSTATE_INIT(10), + {NULL}, +}; + +static bool has_pkg_state_counter(void) +{ + u64 val; + struct pkg_cstate_info *info = pkg_cstates; + + /* check if any one of the counter msrs exists */ + while (info->msr_index) { + if (!rdmsrl_safe(info->msr_index, &val)) + return true; + info++; + } + + return false; +} + +static u64 pkg_state_counter(void) +{ + u64 val; + u64 count = 0; + struct pkg_cstate_info *info = pkg_cstates; + + while (info->msr_index) { + if (!info->skip) { + if (!rdmsrl_safe(info->msr_index, &val)) + count += val; + else + info->skip = true; + } + info++; + } + + return count; +} + +static unsigned int get_compensation(int ratio) +{ + unsigned int comp = 0; + + /* we only use compensation if all adjacent ones are good */ + if (ratio == 1 && + cal_data[ratio].confidence >= CONFIDENCE_OK && + cal_data[ratio + 1].confidence >= CONFIDENCE_OK && + cal_data[ratio + 2].confidence >= CONFIDENCE_OK) { + comp = (cal_data[ratio].steady_comp + + cal_data[ratio + 1].steady_comp + + cal_data[ratio + 2].steady_comp) / 3; + } else if (ratio == MAX_TARGET_RATIO - 1 && + cal_data[ratio].confidence >= CONFIDENCE_OK && + cal_data[ratio - 1].confidence >= CONFIDENCE_OK && + cal_data[ratio - 2].confidence >= CONFIDENCE_OK) { + comp = (cal_data[ratio].steady_comp + + cal_data[ratio - 1].steady_comp + + cal_data[ratio - 2].steady_comp) / 3; + } else if (cal_data[ratio].confidence >= CONFIDENCE_OK && + cal_data[ratio - 1].confidence >= CONFIDENCE_OK && + cal_data[ratio + 1].confidence >= CONFIDENCE_OK) { + comp = (cal_data[ratio].steady_comp + + cal_data[ratio - 1].steady_comp + + cal_data[ratio + 1].steady_comp) / 3; + } + + /* REVISIT: simple penalty of double idle injection */ + if (reduce_irq) + comp = ratio; + /* do not exceed limit */ + if (comp + ratio >= MAX_TARGET_RATIO) + comp = MAX_TARGET_RATIO - ratio - 1; + + return comp; +} + +static void adjust_compensation(int target_ratio, unsigned int win) +{ + int delta; + struct powerclamp_calibration_data *d = &cal_data[target_ratio]; + + /* + * adjust compensations if confidence level has not been reached or + * there are too many wakeups during the last idle injection period, we + * cannot trust the data for compensation. + */ + if (d->confidence >= CONFIDENCE_OK || + atomic_read(&idle_wakeup_counter) > + win * num_online_cpus()) + return; + + delta = set_target_ratio - current_ratio; + /* filter out bad data */ + if (delta >= 0 && delta <= (1+target_ratio/10)) { + if (d->steady_comp) + d->steady_comp = + roundup(delta+d->steady_comp, 2)/2; + else + d->steady_comp = delta; + d->confidence++; + } +} + +static bool powerclamp_adjust_controls(unsigned int target_ratio, + unsigned int guard, unsigned int win) +{ + static u64 msr_last, tsc_last; + u64 msr_now, tsc_now; + u64 val64; + + /* check result for the last window */ + msr_now = pkg_state_counter(); + tsc_now = rdtsc(); + + /* calculate pkg cstate vs tsc ratio */ + if (!msr_last || !tsc_last) + current_ratio = 1; + else if (tsc_now-tsc_last) { + val64 = 100*(msr_now-msr_last); + do_div(val64, (tsc_now-tsc_last)); + current_ratio = val64; + } + + /* update record */ + msr_last = msr_now; + tsc_last = tsc_now; + + adjust_compensation(target_ratio, win); + /* + * too many external interrupts, set flag such + * that we can take measure later. + */ + reduce_irq = atomic_read(&idle_wakeup_counter) >= + 2 * win * num_online_cpus(); + + atomic_set(&idle_wakeup_counter, 0); + /* if we are above target+guard, skip */ + return set_target_ratio + guard <= current_ratio; +} + +static void clamp_balancing_func(struct kthread_work *work) +{ + struct powerclamp_worker_data *w_data; + int sleeptime; + unsigned long target_jiffies; + unsigned int compensated_ratio; + int interval; /* jiffies to sleep for each attempt */ + + w_data = container_of(work, struct powerclamp_worker_data, + balancing_work); + + /* + * make sure user selected ratio does not take effect until + * the next round. adjust target_ratio if user has changed + * target such that we can converge quickly. + */ + w_data->target_ratio = READ_ONCE(set_target_ratio); + w_data->guard = 1 + w_data->target_ratio / 20; + w_data->window_size_now = window_size; + w_data->duration_jiffies = msecs_to_jiffies(duration); + w_data->count++; + + /* + * systems may have different ability to enter package level + * c-states, thus we need to compensate the injected idle ratio + * to achieve the actual target reported by the HW. + */ + compensated_ratio = w_data->target_ratio + + get_compensation(w_data->target_ratio); + if (compensated_ratio <= 0) + compensated_ratio = 1; + interval = w_data->duration_jiffies * 100 / compensated_ratio; + + /* align idle time */ + target_jiffies = roundup(jiffies, interval); + sleeptime = target_jiffies - jiffies; + if (sleeptime <= 0) + sleeptime = 1; + + if (clamping && w_data->clamping && cpu_online(w_data->cpu)) + kthread_queue_delayed_work(w_data->worker, + &w_data->idle_injection_work, + sleeptime); +} + +static void clamp_idle_injection_func(struct kthread_work *work) +{ + struct powerclamp_worker_data *w_data; + + w_data = container_of(work, struct powerclamp_worker_data, + idle_injection_work.work); + + /* + * only elected controlling cpu can collect stats and update + * control parameters. + */ + if (w_data->cpu == control_cpu && + !(w_data->count % w_data->window_size_now)) { + should_skip = + powerclamp_adjust_controls(w_data->target_ratio, + w_data->guard, + w_data->window_size_now); + smp_mb(); + } + + if (should_skip) + goto balance; + + play_idle(jiffies_to_msecs(w_data->duration_jiffies)); + +balance: + if (clamping && w_data->clamping && cpu_online(w_data->cpu)) + kthread_queue_work(w_data->worker, &w_data->balancing_work); +} + +/* + * 1 HZ polling while clamping is active, useful for userspace + * to monitor actual idle ratio. + */ +static void poll_pkg_cstate(struct work_struct *dummy); +static DECLARE_DELAYED_WORK(poll_pkg_cstate_work, poll_pkg_cstate); +static void poll_pkg_cstate(struct work_struct *dummy) +{ + static u64 msr_last; + static u64 tsc_last; + + u64 msr_now; + u64 tsc_now; + u64 val64; + + msr_now = pkg_state_counter(); + tsc_now = rdtsc(); + + /* calculate pkg cstate vs tsc ratio */ + if (!msr_last || !tsc_last) + pkg_cstate_ratio_cur = 1; + else { + if (tsc_now - tsc_last) { + val64 = 100 * (msr_now - msr_last); + do_div(val64, (tsc_now - tsc_last)); + pkg_cstate_ratio_cur = val64; + } + } + + /* update record */ + msr_last = msr_now; + tsc_last = tsc_now; + + if (true == clamping) + schedule_delayed_work(&poll_pkg_cstate_work, HZ); +} + +static void start_power_clamp_worker(unsigned long cpu) +{ + struct powerclamp_worker_data *w_data = per_cpu_ptr(worker_data, cpu); + struct kthread_worker *worker; + + worker = kthread_create_worker_on_cpu(cpu, 0, "kidle_inject/%ld", cpu); + if (IS_ERR(worker)) + return; + + w_data->worker = worker; + w_data->count = 0; + w_data->cpu = cpu; + w_data->clamping = true; + set_bit(cpu, cpu_clamping_mask); + sched_setscheduler(worker->task, SCHED_FIFO, &sparam); + kthread_init_work(&w_data->balancing_work, clamp_balancing_func); + kthread_init_delayed_work(&w_data->idle_injection_work, + clamp_idle_injection_func); + kthread_queue_work(w_data->worker, &w_data->balancing_work); +} + +static void stop_power_clamp_worker(unsigned long cpu) +{ + struct powerclamp_worker_data *w_data = per_cpu_ptr(worker_data, cpu); + + if (!w_data->worker) + return; + + w_data->clamping = false; + /* + * Make sure that all works that get queued after this point see + * the clamping disabled. The counter part is not needed because + * there is an implicit memory barrier when the queued work + * is proceed. + */ + smp_wmb(); + kthread_cancel_work_sync(&w_data->balancing_work); + kthread_cancel_delayed_work_sync(&w_data->idle_injection_work); + /* + * The balancing work still might be queued here because + * the handling of the "clapming" variable, cancel, and queue + * operations are not synchronized via a lock. But it is not + * a big deal. The balancing work is fast and destroy kthread + * will wait for it. + */ + clear_bit(w_data->cpu, cpu_clamping_mask); + kthread_destroy_worker(w_data->worker); + + w_data->worker = NULL; +} + +static int start_power_clamp(void) +{ + unsigned long cpu; + + set_target_ratio = clamp(set_target_ratio, 0U, MAX_TARGET_RATIO - 1); + /* prevent cpu hotplug */ + get_online_cpus(); + + /* prefer BSP */ + control_cpu = 0; + if (!cpu_online(control_cpu)) + control_cpu = smp_processor_id(); + + clamping = true; + schedule_delayed_work(&poll_pkg_cstate_work, 0); + + /* start one kthread worker per online cpu */ + for_each_online_cpu(cpu) { + start_power_clamp_worker(cpu); + } + put_online_cpus(); + + return 0; +} + +static void end_power_clamp(void) +{ + int i; + + /* + * Block requeuing in all the kthread workers. They will flush and + * stop faster. + */ + clamping = false; + if (bitmap_weight(cpu_clamping_mask, num_possible_cpus())) { + for_each_set_bit(i, cpu_clamping_mask, num_possible_cpus()) { + pr_debug("clamping worker for cpu %d alive, destroy\n", + i); + stop_power_clamp_worker(i); + } + } +} + +static int powerclamp_cpu_online(unsigned int cpu) +{ + if (clamping == false) + return 0; + start_power_clamp_worker(cpu); + /* prefer BSP as controlling CPU */ + if (cpu == 0) { + control_cpu = 0; + smp_mb(); + } + return 0; +} + +static int powerclamp_cpu_predown(unsigned int cpu) +{ + if (clamping == false) + return 0; + + stop_power_clamp_worker(cpu); + if (cpu != control_cpu) + return 0; + + control_cpu = cpumask_first(cpu_online_mask); + if (control_cpu == cpu) + control_cpu = cpumask_next(cpu, cpu_online_mask); + smp_mb(); + return 0; +} + +static int powerclamp_get_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + *state = MAX_TARGET_RATIO; + + return 0; +} + +static int powerclamp_get_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + if (true == clamping) + *state = pkg_cstate_ratio_cur; + else + /* to save power, do not poll idle ratio while not clamping */ + *state = -1; /* indicates invalid state */ + + return 0; +} + +static int powerclamp_set_cur_state(struct thermal_cooling_device *cdev, + unsigned long new_target_ratio) +{ + int ret = 0; + + new_target_ratio = clamp(new_target_ratio, 0UL, + (unsigned long) (MAX_TARGET_RATIO-1)); + if (set_target_ratio == 0 && new_target_ratio > 0) { + pr_info("Start idle injection to reduce power\n"); + set_target_ratio = new_target_ratio; + ret = start_power_clamp(); + goto exit_set; + } else if (set_target_ratio > 0 && new_target_ratio == 0) { + pr_info("Stop forced idle injection\n"); + end_power_clamp(); + set_target_ratio = 0; + } else /* adjust currently running */ { + set_target_ratio = new_target_ratio; + /* make new set_target_ratio visible to other cpus */ + smp_mb(); + } + +exit_set: + return ret; +} + +/* bind to generic thermal layer as cooling device*/ +static struct thermal_cooling_device_ops powerclamp_cooling_ops = { + .get_max_state = powerclamp_get_max_state, + .get_cur_state = powerclamp_get_cur_state, + .set_cur_state = powerclamp_set_cur_state, +}; + +static const struct x86_cpu_id __initconst intel_powerclamp_ids[] = { + { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_MWAIT }, + {} +}; +MODULE_DEVICE_TABLE(x86cpu, intel_powerclamp_ids); + +static int __init powerclamp_probe(void) +{ + + if (!x86_match_cpu(intel_powerclamp_ids)) { + pr_err("CPU does not support MWAIT\n"); + return -ENODEV; + } + + /* The goal for idle time alignment is to achieve package cstate. */ + if (!has_pkg_state_counter()) { + pr_info("No package C-state available\n"); + return -ENODEV; + } + + /* find the deepest mwait value */ + find_target_mwait(); + + return 0; +} + +static int powerclamp_debug_show(struct seq_file *m, void *unused) +{ + int i = 0; + + seq_printf(m, "controlling cpu: %d\n", control_cpu); + seq_printf(m, "pct confidence steady dynamic (compensation)\n"); + for (i = 0; i < MAX_TARGET_RATIO; i++) { + seq_printf(m, "%d\t%lu\t%lu\t%lu\n", + i, + cal_data[i].confidence, + cal_data[i].steady_comp, + cal_data[i].dynamic_comp); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(powerclamp_debug); + +static inline void powerclamp_create_debug_files(void) +{ + debug_dir = debugfs_create_dir("intel_powerclamp", NULL); + if (!debug_dir) + return; + + if (!debugfs_create_file("powerclamp_calib", S_IRUGO, debug_dir, + cal_data, &powerclamp_debug_fops)) + goto file_error; + + return; + +file_error: + debugfs_remove_recursive(debug_dir); +} + +static enum cpuhp_state hp_state; + +static int __init powerclamp_init(void) +{ + int retval; + int bitmap_size; + + bitmap_size = BITS_TO_LONGS(num_possible_cpus()) * sizeof(long); + cpu_clamping_mask = kzalloc(bitmap_size, GFP_KERNEL); + if (!cpu_clamping_mask) + return -ENOMEM; + + /* probe cpu features and ids here */ + retval = powerclamp_probe(); + if (retval) + goto exit_free; + + /* set default limit, maybe adjusted during runtime based on feedback */ + window_size = 2; + retval = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, + "thermal/intel_powerclamp:online", + powerclamp_cpu_online, + powerclamp_cpu_predown); + if (retval < 0) + goto exit_free; + + hp_state = retval; + + worker_data = alloc_percpu(struct powerclamp_worker_data); + if (!worker_data) { + retval = -ENOMEM; + goto exit_unregister; + } + + cooling_dev = thermal_cooling_device_register("intel_powerclamp", NULL, + &powerclamp_cooling_ops); + if (IS_ERR(cooling_dev)) { + retval = -ENODEV; + goto exit_free_thread; + } + + if (!duration) + duration = jiffies_to_msecs(DEFAULT_DURATION_JIFFIES); + + powerclamp_create_debug_files(); + + return 0; + +exit_free_thread: + free_percpu(worker_data); +exit_unregister: + cpuhp_remove_state_nocalls(hp_state); +exit_free: + kfree(cpu_clamping_mask); + return retval; +} +module_init(powerclamp_init); + +static void __exit powerclamp_exit(void) +{ + end_power_clamp(); + cpuhp_remove_state_nocalls(hp_state); + free_percpu(worker_data); + thermal_cooling_device_unregister(cooling_dev); + kfree(cpu_clamping_mask); + + cancel_delayed_work_sync(&poll_pkg_cstate_work); + debugfs_remove_recursive(debug_dir); +} +module_exit(powerclamp_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Arjan van de Ven <arjan@linux.intel.com>"); +MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@linux.intel.com>"); +MODULE_DESCRIPTION("Package Level C-state Idle Injection for Intel CPUs"); diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c new file mode 100644 index 000000000000..5d33b350da1c --- /dev/null +++ b/drivers/thermal/intel/intel_quark_dts_thermal.c @@ -0,0 +1,471 @@ +/* + * intel_quark_dts_thermal.c + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2015 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * Contact Information: + * Ong Boon Leong <boon.leong.ong@intel.com> + * Intel Malaysia, Penang + * + * BSD LICENSE + * + * Copyright(c) 2015 Intel Corporation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Quark DTS thermal driver is implemented by referencing + * intel_soc_dts_thermal.c. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/thermal.h> +#include <asm/cpu_device_id.h> +#include <asm/iosf_mbi.h> + +#define X86_FAMILY_QUARK 0x5 +#define X86_MODEL_QUARK_X1000 0x9 + +/* DTS reset is programmed via QRK_MBI_UNIT_SOC */ +#define QRK_DTS_REG_OFFSET_RESET 0x34 +#define QRK_DTS_RESET_BIT BIT(0) + +/* DTS enable is programmed via QRK_MBI_UNIT_RMU */ +#define QRK_DTS_REG_OFFSET_ENABLE 0xB0 +#define QRK_DTS_ENABLE_BIT BIT(15) + +/* Temperature Register is read via QRK_MBI_UNIT_RMU */ +#define QRK_DTS_REG_OFFSET_TEMP 0xB1 +#define QRK_DTS_MASK_TEMP 0xFF +#define QRK_DTS_OFFSET_TEMP 0 +#define QRK_DTS_OFFSET_REL_TEMP 16 +#define QRK_DTS_TEMP_BASE 50 + +/* Programmable Trip Point Register is configured via QRK_MBI_UNIT_RMU */ +#define QRK_DTS_REG_OFFSET_PTPS 0xB2 +#define QRK_DTS_MASK_TP_THRES 0xFF +#define QRK_DTS_SHIFT_TP 8 +#define QRK_DTS_ID_TP_CRITICAL 0 +#define QRK_DTS_SAFE_TP_THRES 105 + +/* Thermal Sensor Register Lock */ +#define QRK_DTS_REG_OFFSET_LOCK 0x71 +#define QRK_DTS_LOCK_BIT BIT(5) + +/* Quark DTS has 2 trip points: hot & catastrophic */ +#define QRK_MAX_DTS_TRIPS 2 +/* If DTS not locked, all trip points are configurable */ +#define QRK_DTS_WR_MASK_SET 0x3 +/* If DTS locked, all trip points are not configurable */ +#define QRK_DTS_WR_MASK_CLR 0 + +#define DEFAULT_POLL_DELAY 2000 + +struct soc_sensor_entry { + bool locked; + u32 store_ptps; + u32 store_dts_enable; + enum thermal_device_mode mode; + struct thermal_zone_device *tzone; +}; + +static struct soc_sensor_entry *soc_dts; + +static int polling_delay = DEFAULT_POLL_DELAY; +module_param(polling_delay, int, 0644); +MODULE_PARM_DESC(polling_delay, + "Polling interval for checking trip points (in milliseconds)"); + +static DEFINE_MUTEX(dts_update_mutex); + +static int soc_dts_enable(struct thermal_zone_device *tzd) +{ + u32 out; + struct soc_sensor_entry *aux_entry = tzd->devdata; + int ret; + + ret = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_ENABLE, &out); + if (ret) + return ret; + + if (out & QRK_DTS_ENABLE_BIT) { + aux_entry->mode = THERMAL_DEVICE_ENABLED; + return 0; + } + + if (!aux_entry->locked) { + out |= QRK_DTS_ENABLE_BIT; + ret = iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE, + QRK_DTS_REG_OFFSET_ENABLE, out); + if (ret) + return ret; + + aux_entry->mode = THERMAL_DEVICE_ENABLED; + } else { + aux_entry->mode = THERMAL_DEVICE_DISABLED; + pr_info("DTS is locked. Cannot enable DTS\n"); + ret = -EPERM; + } + + return ret; +} + +static int soc_dts_disable(struct thermal_zone_device *tzd) +{ + u32 out; + struct soc_sensor_entry *aux_entry = tzd->devdata; + int ret; + + ret = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_ENABLE, &out); + if (ret) + return ret; + + if (!(out & QRK_DTS_ENABLE_BIT)) { + aux_entry->mode = THERMAL_DEVICE_DISABLED; + return 0; + } + + if (!aux_entry->locked) { + out &= ~QRK_DTS_ENABLE_BIT; + ret = iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE, + QRK_DTS_REG_OFFSET_ENABLE, out); + + if (ret) + return ret; + + aux_entry->mode = THERMAL_DEVICE_DISABLED; + } else { + aux_entry->mode = THERMAL_DEVICE_ENABLED; + pr_info("DTS is locked. Cannot disable DTS\n"); + ret = -EPERM; + } + + return ret; +} + +static int _get_trip_temp(int trip, int *temp) +{ + int status; + u32 out; + + mutex_lock(&dts_update_mutex); + status = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_PTPS, &out); + mutex_unlock(&dts_update_mutex); + + if (status) + return status; + + /* + * Thermal Sensor Programmable Trip Point Register has 8-bit + * fields for critical (catastrophic) and hot set trip point + * thresholds. The threshold value is always offset by its + * temperature base (50 degree Celsius). + */ + *temp = (out >> (trip * QRK_DTS_SHIFT_TP)) & QRK_DTS_MASK_TP_THRES; + *temp -= QRK_DTS_TEMP_BASE; + + return 0; +} + +static inline int sys_get_trip_temp(struct thermal_zone_device *tzd, + int trip, int *temp) +{ + return _get_trip_temp(trip, temp); +} + +static inline int sys_get_crit_temp(struct thermal_zone_device *tzd, int *temp) +{ + return _get_trip_temp(QRK_DTS_ID_TP_CRITICAL, temp); +} + +static int update_trip_temp(struct soc_sensor_entry *aux_entry, + int trip, int temp) +{ + u32 out; + u32 temp_out; + u32 store_ptps; + int ret; + + mutex_lock(&dts_update_mutex); + if (aux_entry->locked) { + ret = -EPERM; + goto failed; + } + + ret = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_PTPS, &store_ptps); + if (ret) + goto failed; + + /* + * Protection against unsafe trip point thresdhold value. + * As Quark X1000 data-sheet does not provide any recommendation + * regarding the safe trip point threshold value to use, we choose + * the safe value according to the threshold value set by UEFI BIOS. + */ + if (temp > QRK_DTS_SAFE_TP_THRES) + temp = QRK_DTS_SAFE_TP_THRES; + + /* + * Thermal Sensor Programmable Trip Point Register has 8-bit + * fields for critical (catastrophic) and hot set trip point + * thresholds. The threshold value is always offset by its + * temperature base (50 degree Celsius). + */ + temp_out = temp + QRK_DTS_TEMP_BASE; + out = (store_ptps & ~(QRK_DTS_MASK_TP_THRES << + (trip * QRK_DTS_SHIFT_TP))); + out |= (temp_out & QRK_DTS_MASK_TP_THRES) << + (trip * QRK_DTS_SHIFT_TP); + + ret = iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE, + QRK_DTS_REG_OFFSET_PTPS, out); + +failed: + mutex_unlock(&dts_update_mutex); + return ret; +} + +static inline int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, + int temp) +{ + return update_trip_temp(tzd->devdata, trip, temp); +} + +static int sys_get_trip_type(struct thermal_zone_device *thermal, + int trip, enum thermal_trip_type *type) +{ + if (trip) + *type = THERMAL_TRIP_HOT; + else + *type = THERMAL_TRIP_CRITICAL; + + return 0; +} + +static int sys_get_curr_temp(struct thermal_zone_device *tzd, + int *temp) +{ + u32 out; + int ret; + + mutex_lock(&dts_update_mutex); + ret = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_TEMP, &out); + mutex_unlock(&dts_update_mutex); + + if (ret) + return ret; + + /* + * Thermal Sensor Temperature Register has 8-bit field + * for temperature value (offset by temperature base + * 50 degree Celsius). + */ + out = (out >> QRK_DTS_OFFSET_TEMP) & QRK_DTS_MASK_TEMP; + *temp = out - QRK_DTS_TEMP_BASE; + + return 0; +} + +static int sys_get_mode(struct thermal_zone_device *tzd, + enum thermal_device_mode *mode) +{ + struct soc_sensor_entry *aux_entry = tzd->devdata; + *mode = aux_entry->mode; + return 0; +} + +static int sys_set_mode(struct thermal_zone_device *tzd, + enum thermal_device_mode mode) +{ + int ret; + + mutex_lock(&dts_update_mutex); + if (mode == THERMAL_DEVICE_ENABLED) + ret = soc_dts_enable(tzd); + else + ret = soc_dts_disable(tzd); + mutex_unlock(&dts_update_mutex); + + return ret; +} + +static struct thermal_zone_device_ops tzone_ops = { + .get_temp = sys_get_curr_temp, + .get_trip_temp = sys_get_trip_temp, + .get_trip_type = sys_get_trip_type, + .set_trip_temp = sys_set_trip_temp, + .get_crit_temp = sys_get_crit_temp, + .get_mode = sys_get_mode, + .set_mode = sys_set_mode, +}; + +static void free_soc_dts(struct soc_sensor_entry *aux_entry) +{ + if (aux_entry) { + if (!aux_entry->locked) { + mutex_lock(&dts_update_mutex); + iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE, + QRK_DTS_REG_OFFSET_ENABLE, + aux_entry->store_dts_enable); + + iosf_mbi_write(QRK_MBI_UNIT_RMU, MBI_REG_WRITE, + QRK_DTS_REG_OFFSET_PTPS, + aux_entry->store_ptps); + mutex_unlock(&dts_update_mutex); + } + thermal_zone_device_unregister(aux_entry->tzone); + kfree(aux_entry); + } +} + +static struct soc_sensor_entry *alloc_soc_dts(void) +{ + struct soc_sensor_entry *aux_entry; + int err; + u32 out; + int wr_mask; + + aux_entry = kzalloc(sizeof(*aux_entry), GFP_KERNEL); + if (!aux_entry) { + err = -ENOMEM; + return ERR_PTR(-ENOMEM); + } + + /* Check if DTS register is locked */ + err = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_LOCK, &out); + if (err) + goto err_ret; + + if (out & QRK_DTS_LOCK_BIT) { + aux_entry->locked = true; + wr_mask = QRK_DTS_WR_MASK_CLR; + } else { + aux_entry->locked = false; + wr_mask = QRK_DTS_WR_MASK_SET; + } + + /* Store DTS default state if DTS registers are not locked */ + if (!aux_entry->locked) { + /* Store DTS default enable for restore on exit */ + err = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_ENABLE, + &aux_entry->store_dts_enable); + if (err) + goto err_ret; + + /* Store DTS default PTPS register for restore on exit */ + err = iosf_mbi_read(QRK_MBI_UNIT_RMU, MBI_REG_READ, + QRK_DTS_REG_OFFSET_PTPS, + &aux_entry->store_ptps); + if (err) + goto err_ret; + } + + aux_entry->tzone = thermal_zone_device_register("quark_dts", + QRK_MAX_DTS_TRIPS, + wr_mask, + aux_entry, &tzone_ops, NULL, 0, polling_delay); + if (IS_ERR(aux_entry->tzone)) { + err = PTR_ERR(aux_entry->tzone); + goto err_ret; + } + + mutex_lock(&dts_update_mutex); + err = soc_dts_enable(aux_entry->tzone); + mutex_unlock(&dts_update_mutex); + if (err) + goto err_aux_status; + + return aux_entry; + +err_aux_status: + thermal_zone_device_unregister(aux_entry->tzone); +err_ret: + kfree(aux_entry); + return ERR_PTR(err); +} + +static const struct x86_cpu_id qrk_thermal_ids[] __initconst = { + { X86_VENDOR_INTEL, X86_FAMILY_QUARK, X86_MODEL_QUARK_X1000 }, + {} +}; +MODULE_DEVICE_TABLE(x86cpu, qrk_thermal_ids); + +static int __init intel_quark_thermal_init(void) +{ + int err = 0; + + if (!x86_match_cpu(qrk_thermal_ids) || !iosf_mbi_available()) + return -ENODEV; + + soc_dts = alloc_soc_dts(); + if (IS_ERR(soc_dts)) { + err = PTR_ERR(soc_dts); + goto err_free; + } + + return 0; + +err_free: + free_soc_dts(soc_dts); + return err; +} + +static void __exit intel_quark_thermal_exit(void) +{ + free_soc_dts(soc_dts); +} + +module_init(intel_quark_thermal_init) +module_exit(intel_quark_thermal_exit) + +MODULE_DESCRIPTION("Intel Quark DTS Thermal Driver"); +MODULE_AUTHOR("Ong Boon Leong <boon.leong.ong@intel.com>"); +MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.c b/drivers/thermal/intel/intel_soc_dts_iosf.c new file mode 100644 index 000000000000..e0813dfaa278 --- /dev/null +++ b/drivers/thermal/intel/intel_soc_dts_iosf.c @@ -0,0 +1,478 @@ +/* + * intel_soc_dts_iosf.c + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <asm/iosf_mbi.h> +#include "intel_soc_dts_iosf.h" + +#define SOC_DTS_OFFSET_ENABLE 0xB0 +#define SOC_DTS_OFFSET_TEMP 0xB1 + +#define SOC_DTS_OFFSET_PTPS 0xB2 +#define SOC_DTS_OFFSET_PTTS 0xB3 +#define SOC_DTS_OFFSET_PTTSS 0xB4 +#define SOC_DTS_OFFSET_PTMC 0x80 +#define SOC_DTS_TE_AUX0 0xB5 +#define SOC_DTS_TE_AUX1 0xB6 + +#define SOC_DTS_AUX0_ENABLE_BIT BIT(0) +#define SOC_DTS_AUX1_ENABLE_BIT BIT(1) +#define SOC_DTS_CPU_MODULE0_ENABLE_BIT BIT(16) +#define SOC_DTS_CPU_MODULE1_ENABLE_BIT BIT(17) +#define SOC_DTS_TE_SCI_ENABLE BIT(9) +#define SOC_DTS_TE_SMI_ENABLE BIT(10) +#define SOC_DTS_TE_MSI_ENABLE BIT(11) +#define SOC_DTS_TE_APICA_ENABLE BIT(14) +#define SOC_DTS_PTMC_APIC_DEASSERT_BIT BIT(4) + +/* DTS encoding for TJ MAX temperature */ +#define SOC_DTS_TJMAX_ENCODING 0x7F + +/* Only 2 out of 4 is allowed for OSPM */ +#define SOC_MAX_DTS_TRIPS 2 + +/* Mask for two trips in status bits */ +#define SOC_DTS_TRIP_MASK 0x03 + +/* DTS0 and DTS 1 */ +#define SOC_MAX_DTS_SENSORS 2 + +static int get_tj_max(u32 *tj_max) +{ + u32 eax, edx; + u32 val; + int err; + + err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); + if (err) + goto err_ret; + else { + val = (eax >> 16) & 0xff; + if (val) + *tj_max = val * 1000; + else { + err = -EINVAL; + goto err_ret; + } + } + + return 0; +err_ret: + *tj_max = 0; + + return err; +} + +static int sys_get_trip_temp(struct thermal_zone_device *tzd, int trip, + int *temp) +{ + int status; + u32 out; + struct intel_soc_dts_sensor_entry *dts; + struct intel_soc_dts_sensors *sensors; + + dts = tzd->devdata; + sensors = dts->sensors; + mutex_lock(&sensors->dts_update_lock); + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTPS, &out); + mutex_unlock(&sensors->dts_update_lock); + if (status) + return status; + + out = (out >> (trip * 8)) & SOC_DTS_TJMAX_ENCODING; + if (!out) + *temp = 0; + else + *temp = sensors->tj_max - out * 1000; + + return 0; +} + +static int update_trip_temp(struct intel_soc_dts_sensor_entry *dts, + int thres_index, int temp, + enum thermal_trip_type trip_type) +{ + int status; + u32 temp_out; + u32 out; + u32 store_ptps; + u32 store_ptmc; + u32 store_te_out; + u32 te_out; + u32 int_enable_bit = SOC_DTS_TE_APICA_ENABLE; + struct intel_soc_dts_sensors *sensors = dts->sensors; + + if (sensors->intr_type == INTEL_SOC_DTS_INTERRUPT_MSI) + int_enable_bit |= SOC_DTS_TE_MSI_ENABLE; + + temp_out = (sensors->tj_max - temp) / 1000; + + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTPS, &store_ptps); + if (status) + return status; + + out = (store_ptps & ~(0xFF << (thres_index * 8))); + out |= (temp_out & 0xFF) << (thres_index * 8); + status = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTPS, out); + if (status) + return status; + + pr_debug("update_trip_temp PTPS = %x\n", out); + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTMC, &out); + if (status) + goto err_restore_ptps; + + store_ptmc = out; + + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_TE_AUX0 + thres_index, + &te_out); + if (status) + goto err_restore_ptmc; + + store_te_out = te_out; + /* Enable for CPU module 0 and module 1 */ + out |= (SOC_DTS_CPU_MODULE0_ENABLE_BIT | + SOC_DTS_CPU_MODULE1_ENABLE_BIT); + if (temp) { + if (thres_index) + out |= SOC_DTS_AUX1_ENABLE_BIT; + else + out |= SOC_DTS_AUX0_ENABLE_BIT; + te_out |= int_enable_bit; + } else { + if (thres_index) + out &= ~SOC_DTS_AUX1_ENABLE_BIT; + else + out &= ~SOC_DTS_AUX0_ENABLE_BIT; + te_out &= ~int_enable_bit; + } + status = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTMC, out); + if (status) + goto err_restore_te_out; + + status = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_TE_AUX0 + thres_index, + te_out); + if (status) + goto err_restore_te_out; + + dts->trip_types[thres_index] = trip_type; + + return 0; +err_restore_te_out: + iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTMC, store_te_out); +err_restore_ptmc: + iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTMC, store_ptmc); +err_restore_ptps: + iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTPS, store_ptps); + /* Nothing we can do if restore fails */ + + return status; +} + +static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, + int temp) +{ + struct intel_soc_dts_sensor_entry *dts = tzd->devdata; + struct intel_soc_dts_sensors *sensors = dts->sensors; + int status; + + if (temp > sensors->tj_max) + return -EINVAL; + + mutex_lock(&sensors->dts_update_lock); + status = update_trip_temp(tzd->devdata, trip, temp, + dts->trip_types[trip]); + mutex_unlock(&sensors->dts_update_lock); + + return status; +} + +static int sys_get_trip_type(struct thermal_zone_device *tzd, + int trip, enum thermal_trip_type *type) +{ + struct intel_soc_dts_sensor_entry *dts; + + dts = tzd->devdata; + + *type = dts->trip_types[trip]; + + return 0; +} + +static int sys_get_curr_temp(struct thermal_zone_device *tzd, + int *temp) +{ + int status; + u32 out; + struct intel_soc_dts_sensor_entry *dts; + struct intel_soc_dts_sensors *sensors; + + dts = tzd->devdata; + sensors = dts->sensors; + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_TEMP, &out); + if (status) + return status; + + out = (out & dts->temp_mask) >> dts->temp_shift; + out -= SOC_DTS_TJMAX_ENCODING; + *temp = sensors->tj_max - out * 1000; + + return 0; +} + +static struct thermal_zone_device_ops tzone_ops = { + .get_temp = sys_get_curr_temp, + .get_trip_temp = sys_get_trip_temp, + .get_trip_type = sys_get_trip_type, + .set_trip_temp = sys_set_trip_temp, +}; + +static int soc_dts_enable(int id) +{ + u32 out; + int ret; + + ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_ENABLE, &out); + if (ret) + return ret; + + if (!(out & BIT(id))) { + out |= BIT(id); + ret = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_ENABLE, out); + if (ret) + return ret; + } + + return ret; +} + +static void remove_dts_thermal_zone(struct intel_soc_dts_sensor_entry *dts) +{ + if (dts) { + iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_ENABLE, dts->store_status); + thermal_zone_device_unregister(dts->tzone); + } +} + +static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts, + bool notification_support, int trip_cnt, + int read_only_trip_cnt) +{ + char name[10]; + int trip_count = 0; + int trip_mask = 0; + u32 store_ptps; + int ret; + int i; + + /* Store status to restor on exit */ + ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_ENABLE, &dts->store_status); + if (ret) + goto err_ret; + + dts->id = id; + dts->temp_mask = 0x00FF << (id * 8); + dts->temp_shift = id * 8; + if (notification_support) { + trip_count = min(SOC_MAX_DTS_TRIPS, trip_cnt); + trip_mask = BIT(trip_count - read_only_trip_cnt) - 1; + } + + /* Check if the writable trip we provide is not used by BIOS */ + ret = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTPS, &store_ptps); + if (ret) + trip_mask = 0; + else { + for (i = 0; i < trip_count; ++i) { + if (trip_mask & BIT(i)) + if (store_ptps & (0xff << (i * 8))) + trip_mask &= ~BIT(i); + } + } + dts->trip_mask = trip_mask; + dts->trip_count = trip_count; + snprintf(name, sizeof(name), "soc_dts%d", id); + dts->tzone = thermal_zone_device_register(name, + trip_count, + trip_mask, + dts, &tzone_ops, + NULL, 0, 0); + if (IS_ERR(dts->tzone)) { + ret = PTR_ERR(dts->tzone); + goto err_ret; + } + + ret = soc_dts_enable(id); + if (ret) + goto err_enable; + + return 0; +err_enable: + thermal_zone_device_unregister(dts->tzone); +err_ret: + return ret; +} + +int intel_soc_dts_iosf_add_read_only_critical_trip( + struct intel_soc_dts_sensors *sensors, int critical_offset) +{ + int i, j; + + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) { + for (j = 0; j < sensors->soc_dts[i].trip_count; ++j) { + if (!(sensors->soc_dts[i].trip_mask & BIT(j))) { + return update_trip_temp(&sensors->soc_dts[i], j, + sensors->tj_max - critical_offset, + THERMAL_TRIP_CRITICAL); + } + } + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_add_read_only_critical_trip); + +void intel_soc_dts_iosf_interrupt_handler(struct intel_soc_dts_sensors *sensors) +{ + u32 sticky_out; + int status; + u32 ptmc_out; + unsigned long flags; + + spin_lock_irqsave(&sensors->intr_notify_lock, flags); + + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTMC, &ptmc_out); + ptmc_out |= SOC_DTS_PTMC_APIC_DEASSERT_BIT; + status = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTMC, ptmc_out); + + status = iosf_mbi_read(BT_MBI_UNIT_PMC, MBI_REG_READ, + SOC_DTS_OFFSET_PTTSS, &sticky_out); + pr_debug("status %d PTTSS %x\n", status, sticky_out); + if (sticky_out & SOC_DTS_TRIP_MASK) { + int i; + /* reset sticky bit */ + status = iosf_mbi_write(BT_MBI_UNIT_PMC, MBI_REG_WRITE, + SOC_DTS_OFFSET_PTTSS, sticky_out); + spin_unlock_irqrestore(&sensors->intr_notify_lock, flags); + + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) { + pr_debug("TZD update for zone %d\n", i); + thermal_zone_device_update(sensors->soc_dts[i].tzone, + THERMAL_EVENT_UNSPECIFIED); + } + } else + spin_unlock_irqrestore(&sensors->intr_notify_lock, flags); +} +EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_interrupt_handler); + +struct intel_soc_dts_sensors *intel_soc_dts_iosf_init( + enum intel_soc_dts_interrupt_type intr_type, int trip_count, + int read_only_trip_count) +{ + struct intel_soc_dts_sensors *sensors; + bool notification; + u32 tj_max; + int ret; + int i; + + if (!iosf_mbi_available()) + return ERR_PTR(-ENODEV); + + if (!trip_count || read_only_trip_count > trip_count) + return ERR_PTR(-EINVAL); + + if (get_tj_max(&tj_max)) + return ERR_PTR(-EINVAL); + + sensors = kzalloc(sizeof(*sensors), GFP_KERNEL); + if (!sensors) + return ERR_PTR(-ENOMEM); + + spin_lock_init(&sensors->intr_notify_lock); + mutex_init(&sensors->dts_update_lock); + sensors->intr_type = intr_type; + sensors->tj_max = tj_max; + if (intr_type == INTEL_SOC_DTS_INTERRUPT_NONE) + notification = false; + else + notification = true; + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) { + sensors->soc_dts[i].sensors = sensors; + ret = add_dts_thermal_zone(i, &sensors->soc_dts[i], + notification, trip_count, + read_only_trip_count); + if (ret) + goto err_free; + } + + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) { + ret = update_trip_temp(&sensors->soc_dts[i], 0, 0, + THERMAL_TRIP_PASSIVE); + if (ret) + goto err_remove_zone; + + ret = update_trip_temp(&sensors->soc_dts[i], 1, 0, + THERMAL_TRIP_PASSIVE); + if (ret) + goto err_remove_zone; + } + + return sensors; +err_remove_zone: + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) + remove_dts_thermal_zone(&sensors->soc_dts[i]); + +err_free: + kfree(sensors); + return ERR_PTR(ret); +} +EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_init); + +void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors) +{ + int i; + + for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) { + update_trip_temp(&sensors->soc_dts[i], 0, 0, 0); + update_trip_temp(&sensors->soc_dts[i], 1, 0, 0); + remove_dts_thermal_zone(&sensors->soc_dts[i]); + } + kfree(sensors); +} +EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_exit); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/intel_soc_dts_iosf.h b/drivers/thermal/intel/intel_soc_dts_iosf.h new file mode 100644 index 000000000000..625e37bf93dc --- /dev/null +++ b/drivers/thermal/intel/intel_soc_dts_iosf.h @@ -0,0 +1,62 @@ +/* + * intel_soc_dts_iosf.h + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#ifndef _INTEL_SOC_DTS_IOSF_CORE_H +#define _INTEL_SOC_DTS_IOSF_CORE_H + +#include <linux/thermal.h> + +/* DTS0 and DTS 1 */ +#define SOC_MAX_DTS_SENSORS 2 + +enum intel_soc_dts_interrupt_type { + INTEL_SOC_DTS_INTERRUPT_NONE, + INTEL_SOC_DTS_INTERRUPT_APIC, + INTEL_SOC_DTS_INTERRUPT_MSI, + INTEL_SOC_DTS_INTERRUPT_SCI, + INTEL_SOC_DTS_INTERRUPT_SMI, +}; + +struct intel_soc_dts_sensors; + +struct intel_soc_dts_sensor_entry { + int id; + u32 temp_mask; + u32 temp_shift; + u32 store_status; + u32 trip_mask; + u32 trip_count; + enum thermal_trip_type trip_types[2]; + struct thermal_zone_device *tzone; + struct intel_soc_dts_sensors *sensors; +}; + +struct intel_soc_dts_sensors { + u32 tj_max; + spinlock_t intr_notify_lock; + struct mutex dts_update_lock; + enum intel_soc_dts_interrupt_type intr_type; + struct intel_soc_dts_sensor_entry soc_dts[SOC_MAX_DTS_SENSORS]; +}; + +struct intel_soc_dts_sensors *intel_soc_dts_iosf_init( + enum intel_soc_dts_interrupt_type intr_type, int trip_count, + int read_only_trip_count); +void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors); +void intel_soc_dts_iosf_interrupt_handler( + struct intel_soc_dts_sensors *sensors); +int intel_soc_dts_iosf_add_read_only_critical_trip( + struct intel_soc_dts_sensors *sensors, int critical_offset); +#endif diff --git a/drivers/thermal/intel/intel_soc_dts_thermal.c b/drivers/thermal/intel/intel_soc_dts_thermal.c new file mode 100644 index 000000000000..d748527d7a38 --- /dev/null +++ b/drivers/thermal/intel/intel_soc_dts_thermal.c @@ -0,0 +1,132 @@ +/* + * intel_soc_dts_thermal.c + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/acpi.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <asm/cpu_device_id.h> +#include <asm/intel-family.h> +#include "intel_soc_dts_iosf.h" + +#define CRITICAL_OFFSET_FROM_TJ_MAX 5000 + +static int crit_offset = CRITICAL_OFFSET_FROM_TJ_MAX; +module_param(crit_offset, int, 0644); +MODULE_PARM_DESC(crit_offset, + "Critical Temperature offset from tj max in millidegree Celsius."); + +/* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */ +#define BYT_SOC_DTS_APIC_IRQ 86 + +static int soc_dts_thres_gsi; +static int soc_dts_thres_irq; +static struct intel_soc_dts_sensors *soc_dts; + +static irqreturn_t soc_irq_thread_fn(int irq, void *dev_data) +{ + pr_debug("proc_thermal_interrupt\n"); + intel_soc_dts_iosf_interrupt_handler(soc_dts); + + return IRQ_HANDLED; +} + +static const struct x86_cpu_id soc_thermal_ids[] = { + { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT, 0, + BYT_SOC_DTS_APIC_IRQ}, + {} +}; +MODULE_DEVICE_TABLE(x86cpu, soc_thermal_ids); + +static int __init intel_soc_thermal_init(void) +{ + int err = 0; + const struct x86_cpu_id *match_cpu; + + match_cpu = x86_match_cpu(soc_thermal_ids); + if (!match_cpu) + return -ENODEV; + + /* Create a zone with 2 trips with marked as read only */ + soc_dts = intel_soc_dts_iosf_init(INTEL_SOC_DTS_INTERRUPT_APIC, 2, 1); + if (IS_ERR(soc_dts)) { + err = PTR_ERR(soc_dts); + return err; + } + + soc_dts_thres_gsi = (int)match_cpu->driver_data; + if (soc_dts_thres_gsi) { + /* + * Note the flags here MUST match the firmware defaults, rather + * then the request_irq flags, otherwise we get an EBUSY error. + */ + soc_dts_thres_irq = acpi_register_gsi(NULL, soc_dts_thres_gsi, + ACPI_LEVEL_SENSITIVE, + ACPI_ACTIVE_LOW); + if (soc_dts_thres_irq < 0) { + pr_warn("intel_soc_dts: Could not get IRQ for GSI %d, err %d\n", + soc_dts_thres_gsi, soc_dts_thres_irq); + soc_dts_thres_irq = 0; + } + } + + if (soc_dts_thres_irq) { + err = request_threaded_irq(soc_dts_thres_irq, NULL, + soc_irq_thread_fn, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "soc_dts", soc_dts); + if (err) { + /* + * Do not just error out because the user space thermal + * daemon such as DPTF may use polling instead of being + * interrupt driven. + */ + pr_warn("request_threaded_irq ret %d\n", err); + } + } + + err = intel_soc_dts_iosf_add_read_only_critical_trip(soc_dts, + crit_offset); + if (err) + goto error_trips; + + return 0; + +error_trips: + if (soc_dts_thres_irq) { + free_irq(soc_dts_thres_irq, soc_dts); + acpi_unregister_gsi(soc_dts_thres_gsi); + } + intel_soc_dts_iosf_exit(soc_dts); + + return err; +} + +static void __exit intel_soc_thermal_exit(void) +{ + if (soc_dts_thres_irq) { + free_irq(soc_dts_thres_irq, soc_dts); + acpi_unregister_gsi(soc_dts_thres_gsi); + } + intel_soc_dts_iosf_exit(soc_dts); +} + +module_init(intel_soc_thermal_init) +module_exit(intel_soc_thermal_exit) + +MODULE_DESCRIPTION("Intel SoC DTS Thermal Driver"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c new file mode 100644 index 000000000000..1ef937d799e4 --- /dev/null +++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c @@ -0,0 +1,558 @@ +/* + * x86_pkg_temp_thermal driver + * Copyright (c) 2013, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc. + * + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/param.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/cpu.h> +#include <linux/smp.h> +#include <linux/slab.h> +#include <linux/pm.h> +#include <linux/thermal.h> +#include <linux/debugfs.h> +#include <asm/cpu_device_id.h> +#include <asm/mce.h> + +/* +* Rate control delay: Idea is to introduce denounce effect +* This should be long enough to avoid reduce events, when +* threshold is set to a temperature, which is constantly +* violated, but at the short enough to take any action. +* The action can be remove threshold or change it to next +* interesting setting. Based on experiments, in around +* every 5 seconds under load will give us a significant +* temperature change. +*/ +#define PKG_TEMP_THERMAL_NOTIFY_DELAY 5000 +static int notify_delay_ms = PKG_TEMP_THERMAL_NOTIFY_DELAY; +module_param(notify_delay_ms, int, 0644); +MODULE_PARM_DESC(notify_delay_ms, + "User space notification delay in milli seconds."); + +/* Number of trip points in thermal zone. Currently it can't +* be more than 2. MSR can allow setting and getting notifications +* for only 2 thresholds. This define enforces this, if there +* is some wrong values returned by cpuid for number of thresholds. +*/ +#define MAX_NUMBER_OF_TRIPS 2 + +struct pkg_device { + int cpu; + bool work_scheduled; + u32 tj_max; + u32 msr_pkg_therm_low; + u32 msr_pkg_therm_high; + struct delayed_work work; + struct thermal_zone_device *tzone; + struct cpumask cpumask; +}; + +static struct thermal_zone_params pkg_temp_tz_params = { + .no_hwmon = true, +}; + +/* Keep track of how many package pointers we allocated in init() */ +static int max_packages __read_mostly; +/* Array of package pointers */ +static struct pkg_device **packages; +/* Serializes interrupt notification, work and hotplug */ +static DEFINE_SPINLOCK(pkg_temp_lock); +/* Protects zone operation in the work function against hotplug removal */ +static DEFINE_MUTEX(thermal_zone_mutex); + +/* The dynamically assigned cpu hotplug state for module_exit() */ +static enum cpuhp_state pkg_thermal_hp_state __read_mostly; + +/* Debug counters to show using debugfs */ +static struct dentry *debugfs; +static unsigned int pkg_interrupt_cnt; +static unsigned int pkg_work_cnt; + +static int pkg_temp_debugfs_init(void) +{ + struct dentry *d; + + debugfs = debugfs_create_dir("pkg_temp_thermal", NULL); + if (!debugfs) + return -ENOENT; + + d = debugfs_create_u32("pkg_thres_interrupt", S_IRUGO, debugfs, + &pkg_interrupt_cnt); + if (!d) + goto err_out; + + d = debugfs_create_u32("pkg_thres_work", S_IRUGO, debugfs, + &pkg_work_cnt); + if (!d) + goto err_out; + + return 0; + +err_out: + debugfs_remove_recursive(debugfs); + return -ENOENT; +} + +/* + * Protection: + * + * - cpu hotplug: Read serialized by cpu hotplug lock + * Write must hold pkg_temp_lock + * + * - Other callsites: Must hold pkg_temp_lock + */ +static struct pkg_device *pkg_temp_thermal_get_dev(unsigned int cpu) +{ + int pkgid = topology_logical_package_id(cpu); + + if (pkgid >= 0 && pkgid < max_packages) + return packages[pkgid]; + return NULL; +} + +/* +* tj-max is is interesting because threshold is set relative to this +* temperature. +*/ +static int get_tj_max(int cpu, u32 *tj_max) +{ + u32 eax, edx, val; + int err; + + err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx); + if (err) + return err; + + val = (eax >> 16) & 0xff; + *tj_max = val * 1000; + + return val ? 0 : -EINVAL; +} + +static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp) +{ + struct pkg_device *pkgdev = tzd->devdata; + u32 eax, edx; + + rdmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_STATUS, &eax, &edx); + if (eax & 0x80000000) { + *temp = pkgdev->tj_max - ((eax >> 16) & 0x7f) * 1000; + pr_debug("sys_get_curr_temp %d\n", *temp); + return 0; + } + return -EINVAL; +} + +static int sys_get_trip_temp(struct thermal_zone_device *tzd, + int trip, int *temp) +{ + struct pkg_device *pkgdev = tzd->devdata; + unsigned long thres_reg_value; + u32 mask, shift, eax, edx; + int ret; + + if (trip >= MAX_NUMBER_OF_TRIPS) + return -EINVAL; + + if (trip) { + mask = THERM_MASK_THRESHOLD1; + shift = THERM_SHIFT_THRESHOLD1; + } else { + mask = THERM_MASK_THRESHOLD0; + shift = THERM_SHIFT_THRESHOLD0; + } + + ret = rdmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, + &eax, &edx); + if (ret < 0) + return ret; + + thres_reg_value = (eax & mask) >> shift; + if (thres_reg_value) + *temp = pkgdev->tj_max - thres_reg_value * 1000; + else + *temp = 0; + pr_debug("sys_get_trip_temp %d\n", *temp); + + return 0; +} + +static int +sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp) +{ + struct pkg_device *pkgdev = tzd->devdata; + u32 l, h, mask, shift, intr; + int ret; + + if (trip >= MAX_NUMBER_OF_TRIPS || temp >= pkgdev->tj_max) + return -EINVAL; + + ret = rdmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, + &l, &h); + if (ret < 0) + return ret; + + if (trip) { + mask = THERM_MASK_THRESHOLD1; + shift = THERM_SHIFT_THRESHOLD1; + intr = THERM_INT_THRESHOLD1_ENABLE; + } else { + mask = THERM_MASK_THRESHOLD0; + shift = THERM_SHIFT_THRESHOLD0; + intr = THERM_INT_THRESHOLD0_ENABLE; + } + l &= ~mask; + /* + * When users space sets a trip temperature == 0, which is indication + * that, it is no longer interested in receiving notifications. + */ + if (!temp) { + l &= ~intr; + } else { + l |= (pkgdev->tj_max - temp)/1000 << shift; + l |= intr; + } + + return wrmsr_on_cpu(pkgdev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); +} + +static int sys_get_trip_type(struct thermal_zone_device *thermal, int trip, + enum thermal_trip_type *type) +{ + *type = THERMAL_TRIP_PASSIVE; + return 0; +} + +/* Thermal zone callback registry */ +static struct thermal_zone_device_ops tzone_ops = { + .get_temp = sys_get_curr_temp, + .get_trip_temp = sys_get_trip_temp, + .get_trip_type = sys_get_trip_type, + .set_trip_temp = sys_set_trip_temp, +}; + +static bool pkg_thermal_rate_control(void) +{ + return true; +} + +/* Enable threshold interrupt on local package/cpu */ +static inline void enable_pkg_thres_interrupt(void) +{ + u8 thres_0, thres_1; + u32 l, h; + + rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); + /* only enable/disable if it had valid threshold value */ + thres_0 = (l & THERM_MASK_THRESHOLD0) >> THERM_SHIFT_THRESHOLD0; + thres_1 = (l & THERM_MASK_THRESHOLD1) >> THERM_SHIFT_THRESHOLD1; + if (thres_0) + l |= THERM_INT_THRESHOLD0_ENABLE; + if (thres_1) + l |= THERM_INT_THRESHOLD1_ENABLE; + wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); +} + +/* Disable threshold interrupt on local package/cpu */ +static inline void disable_pkg_thres_interrupt(void) +{ + u32 l, h; + + rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); + + l &= ~(THERM_INT_THRESHOLD0_ENABLE | THERM_INT_THRESHOLD1_ENABLE); + wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, l, h); +} + +static void pkg_temp_thermal_threshold_work_fn(struct work_struct *work) +{ + struct thermal_zone_device *tzone = NULL; + int cpu = smp_processor_id(); + struct pkg_device *pkgdev; + u64 msr_val, wr_val; + + mutex_lock(&thermal_zone_mutex); + spin_lock_irq(&pkg_temp_lock); + ++pkg_work_cnt; + + pkgdev = pkg_temp_thermal_get_dev(cpu); + if (!pkgdev) { + spin_unlock_irq(&pkg_temp_lock); + mutex_unlock(&thermal_zone_mutex); + return; + } + pkgdev->work_scheduled = false; + + rdmsrl(MSR_IA32_PACKAGE_THERM_STATUS, msr_val); + wr_val = msr_val & ~(THERM_LOG_THRESHOLD0 | THERM_LOG_THRESHOLD1); + if (wr_val != msr_val) { + wrmsrl(MSR_IA32_PACKAGE_THERM_STATUS, wr_val); + tzone = pkgdev->tzone; + } + + enable_pkg_thres_interrupt(); + spin_unlock_irq(&pkg_temp_lock); + + /* + * If tzone is not NULL, then thermal_zone_mutex will prevent the + * concurrent removal in the cpu offline callback. + */ + if (tzone) + thermal_zone_device_update(tzone, THERMAL_EVENT_UNSPECIFIED); + + mutex_unlock(&thermal_zone_mutex); +} + +static void pkg_thermal_schedule_work(int cpu, struct delayed_work *work) +{ + unsigned long ms = msecs_to_jiffies(notify_delay_ms); + + schedule_delayed_work_on(cpu, work, ms); +} + +static int pkg_thermal_notify(u64 msr_val) +{ + int cpu = smp_processor_id(); + struct pkg_device *pkgdev; + unsigned long flags; + + spin_lock_irqsave(&pkg_temp_lock, flags); + ++pkg_interrupt_cnt; + + disable_pkg_thres_interrupt(); + + /* Work is per package, so scheduling it once is enough. */ + pkgdev = pkg_temp_thermal_get_dev(cpu); + if (pkgdev && !pkgdev->work_scheduled) { + pkgdev->work_scheduled = true; + pkg_thermal_schedule_work(pkgdev->cpu, &pkgdev->work); + } + + spin_unlock_irqrestore(&pkg_temp_lock, flags); + return 0; +} + +static int pkg_temp_thermal_device_add(unsigned int cpu) +{ + int pkgid = topology_logical_package_id(cpu); + u32 tj_max, eax, ebx, ecx, edx; + struct pkg_device *pkgdev; + int thres_count, err; + + if (pkgid >= max_packages) + return -ENOMEM; + + cpuid(6, &eax, &ebx, &ecx, &edx); + thres_count = ebx & 0x07; + if (!thres_count) + return -ENODEV; + + thres_count = clamp_val(thres_count, 0, MAX_NUMBER_OF_TRIPS); + + err = get_tj_max(cpu, &tj_max); + if (err) + return err; + + pkgdev = kzalloc(sizeof(*pkgdev), GFP_KERNEL); + if (!pkgdev) + return -ENOMEM; + + INIT_DELAYED_WORK(&pkgdev->work, pkg_temp_thermal_threshold_work_fn); + pkgdev->cpu = cpu; + pkgdev->tj_max = tj_max; + pkgdev->tzone = thermal_zone_device_register("x86_pkg_temp", + thres_count, + (thres_count == MAX_NUMBER_OF_TRIPS) ? 0x03 : 0x01, + pkgdev, &tzone_ops, &pkg_temp_tz_params, 0, 0); + if (IS_ERR(pkgdev->tzone)) { + err = PTR_ERR(pkgdev->tzone); + kfree(pkgdev); + return err; + } + /* Store MSR value for package thermal interrupt, to restore at exit */ + rdmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, pkgdev->msr_pkg_therm_low, + pkgdev->msr_pkg_therm_high); + + cpumask_set_cpu(cpu, &pkgdev->cpumask); + spin_lock_irq(&pkg_temp_lock); + packages[pkgid] = pkgdev; + spin_unlock_irq(&pkg_temp_lock); + return 0; +} + +static int pkg_thermal_cpu_offline(unsigned int cpu) +{ + struct pkg_device *pkgdev = pkg_temp_thermal_get_dev(cpu); + bool lastcpu, was_target; + int target; + + if (!pkgdev) + return 0; + + target = cpumask_any_but(&pkgdev->cpumask, cpu); + cpumask_clear_cpu(cpu, &pkgdev->cpumask); + lastcpu = target >= nr_cpu_ids; + /* + * Remove the sysfs files, if this is the last cpu in the package + * before doing further cleanups. + */ + if (lastcpu) { + struct thermal_zone_device *tzone = pkgdev->tzone; + + /* + * We must protect against a work function calling + * thermal_zone_update, after/while unregister. We null out + * the pointer under the zone mutex, so the worker function + * won't try to call. + */ + mutex_lock(&thermal_zone_mutex); + pkgdev->tzone = NULL; + mutex_unlock(&thermal_zone_mutex); + + thermal_zone_device_unregister(tzone); + } + + /* Protect against work and interrupts */ + spin_lock_irq(&pkg_temp_lock); + + /* + * Check whether this cpu was the current target and store the new + * one. When we drop the lock, then the interrupt notify function + * will see the new target. + */ + was_target = pkgdev->cpu == cpu; + pkgdev->cpu = target; + + /* + * If this is the last CPU in the package remove the package + * reference from the array and restore the interrupt MSR. When we + * drop the lock neither the interrupt notify function nor the + * worker will see the package anymore. + */ + if (lastcpu) { + packages[topology_logical_package_id(cpu)] = NULL; + /* After this point nothing touches the MSR anymore. */ + wrmsr(MSR_IA32_PACKAGE_THERM_INTERRUPT, + pkgdev->msr_pkg_therm_low, pkgdev->msr_pkg_therm_high); + } + + /* + * Check whether there is work scheduled and whether the work is + * targeted at the outgoing CPU. + */ + if (pkgdev->work_scheduled && was_target) { + /* + * To cancel the work we need to drop the lock, otherwise + * we might deadlock if the work needs to be flushed. + */ + spin_unlock_irq(&pkg_temp_lock); + cancel_delayed_work_sync(&pkgdev->work); + spin_lock_irq(&pkg_temp_lock); + /* + * If this is not the last cpu in the package and the work + * did not run after we dropped the lock above, then we + * need to reschedule the work, otherwise the interrupt + * stays disabled forever. + */ + if (!lastcpu && pkgdev->work_scheduled) + pkg_thermal_schedule_work(target, &pkgdev->work); + } + + spin_unlock_irq(&pkg_temp_lock); + + /* Final cleanup if this is the last cpu */ + if (lastcpu) + kfree(pkgdev); + return 0; +} + +static int pkg_thermal_cpu_online(unsigned int cpu) +{ + struct pkg_device *pkgdev = pkg_temp_thermal_get_dev(cpu); + struct cpuinfo_x86 *c = &cpu_data(cpu); + + /* Paranoia check */ + if (!cpu_has(c, X86_FEATURE_DTHERM) || !cpu_has(c, X86_FEATURE_PTS)) + return -ENODEV; + + /* If the package exists, nothing to do */ + if (pkgdev) { + cpumask_set_cpu(cpu, &pkgdev->cpumask); + return 0; + } + return pkg_temp_thermal_device_add(cpu); +} + +static const struct x86_cpu_id __initconst pkg_temp_thermal_ids[] = { + { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_PTS }, + {} +}; +MODULE_DEVICE_TABLE(x86cpu, pkg_temp_thermal_ids); + +static int __init pkg_temp_thermal_init(void) +{ + int ret; + + if (!x86_match_cpu(pkg_temp_thermal_ids)) + return -ENODEV; + + max_packages = topology_max_packages(); + packages = kcalloc(max_packages, sizeof(struct pkg_device *), + GFP_KERNEL); + if (!packages) + return -ENOMEM; + + ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "thermal/x86_pkg:online", + pkg_thermal_cpu_online, pkg_thermal_cpu_offline); + if (ret < 0) + goto err; + + /* Store the state for module exit */ + pkg_thermal_hp_state = ret; + + platform_thermal_package_notify = pkg_thermal_notify; + platform_thermal_package_rate_control = pkg_thermal_rate_control; + + /* Don't care if it fails */ + pkg_temp_debugfs_init(); + return 0; + +err: + kfree(packages); + return ret; +} +module_init(pkg_temp_thermal_init) + +static void __exit pkg_temp_thermal_exit(void) +{ + platform_thermal_package_notify = NULL; + platform_thermal_package_rate_control = NULL; + + cpuhp_remove_state(pkg_thermal_hp_state); + debugfs_remove_recursive(debugfs); + kfree(packages); +} +module_exit(pkg_temp_thermal_exit) + +MODULE_DESCRIPTION("X86 PKG TEMP Thermal Driver"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_LICENSE("GPL v2"); |