516 lines
13 KiB
C
516 lines
13 KiB
C
/*
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* processor_thermal_device.c
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/acpi.h>
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#include <linux/thermal.h>
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#include "int340x_thermal_zone.h"
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#include "../intel_soc_dts_iosf.h"
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/* Broadwell-U/HSB thermal reporting device */
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#define PCI_DEVICE_ID_PROC_BDW_THERMAL 0x1603
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#define PCI_DEVICE_ID_PROC_HSB_THERMAL 0x0A03
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/* Skylake thermal reporting device */
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#define PCI_DEVICE_ID_PROC_SKL_THERMAL 0x1903
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/* Braswell thermal reporting device */
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#define PCI_DEVICE_ID_PROC_BSW_THERMAL 0x22DC
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/* Broxton thermal reporting device */
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#define PCI_DEVICE_ID_PROC_BXT0_THERMAL 0x0A8C
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#define PCI_DEVICE_ID_PROC_BXT1_THERMAL 0x1A8C
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#define PCI_DEVICE_ID_PROC_BXTX_THERMAL 0x4A8C
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#define PCI_DEVICE_ID_PROC_BXTP_THERMAL 0x5A8C
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struct power_config {
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u32 index;
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u32 min_uw;
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u32 max_uw;
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u32 tmin_us;
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u32 tmax_us;
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u32 step_uw;
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};
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struct proc_thermal_device {
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struct device *dev;
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struct acpi_device *adev;
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struct power_config power_limits[2];
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struct int34x_thermal_zone *int340x_zone;
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struct intel_soc_dts_sensors *soc_dts;
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};
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enum proc_thermal_emum_mode_type {
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PROC_THERMAL_NONE,
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PROC_THERMAL_PCI,
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PROC_THERMAL_PLATFORM_DEV
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};
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/*
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* We can have only one type of enumeration, PCI or Platform,
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* not both. So we don't need instance specific data.
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*/
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static enum proc_thermal_emum_mode_type proc_thermal_emum_mode =
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PROC_THERMAL_NONE;
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#define POWER_LIMIT_SHOW(index, suffix) \
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static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct pci_dev *pci_dev; \
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struct platform_device *pdev; \
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struct proc_thermal_device *proc_dev; \
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\
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if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \
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pdev = to_platform_device(dev); \
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proc_dev = platform_get_drvdata(pdev); \
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} else { \
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pci_dev = to_pci_dev(dev); \
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proc_dev = pci_get_drvdata(pci_dev); \
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} \
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return sprintf(buf, "%lu\n",\
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(unsigned long)proc_dev->power_limits[index].suffix * 1000); \
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}
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POWER_LIMIT_SHOW(0, min_uw)
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POWER_LIMIT_SHOW(0, max_uw)
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POWER_LIMIT_SHOW(0, step_uw)
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POWER_LIMIT_SHOW(0, tmin_us)
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POWER_LIMIT_SHOW(0, tmax_us)
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POWER_LIMIT_SHOW(1, min_uw)
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POWER_LIMIT_SHOW(1, max_uw)
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POWER_LIMIT_SHOW(1, step_uw)
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POWER_LIMIT_SHOW(1, tmin_us)
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POWER_LIMIT_SHOW(1, tmax_us)
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static DEVICE_ATTR_RO(power_limit_0_min_uw);
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static DEVICE_ATTR_RO(power_limit_0_max_uw);
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static DEVICE_ATTR_RO(power_limit_0_step_uw);
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static DEVICE_ATTR_RO(power_limit_0_tmin_us);
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static DEVICE_ATTR_RO(power_limit_0_tmax_us);
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static DEVICE_ATTR_RO(power_limit_1_min_uw);
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static DEVICE_ATTR_RO(power_limit_1_max_uw);
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static DEVICE_ATTR_RO(power_limit_1_step_uw);
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static DEVICE_ATTR_RO(power_limit_1_tmin_us);
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static DEVICE_ATTR_RO(power_limit_1_tmax_us);
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static struct attribute *power_limit_attrs[] = {
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&dev_attr_power_limit_0_min_uw.attr,
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&dev_attr_power_limit_1_min_uw.attr,
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&dev_attr_power_limit_0_max_uw.attr,
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&dev_attr_power_limit_1_max_uw.attr,
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&dev_attr_power_limit_0_step_uw.attr,
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&dev_attr_power_limit_1_step_uw.attr,
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&dev_attr_power_limit_0_tmin_us.attr,
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&dev_attr_power_limit_1_tmin_us.attr,
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&dev_attr_power_limit_0_tmax_us.attr,
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&dev_attr_power_limit_1_tmax_us.attr,
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NULL
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};
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static struct attribute_group power_limit_attribute_group = {
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.attrs = power_limit_attrs,
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.name = "power_limits"
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};
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static int stored_tjmax; /* since it is fixed, we can have local storage */
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static int get_tjmax(void)
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{
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u32 eax, edx;
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u32 val;
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int err;
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err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
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if (err)
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return err;
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val = (eax >> 16) & 0xff;
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if (val)
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return val;
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return -EINVAL;
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}
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static int read_temp_msr(int *temp)
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{
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int cpu;
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u32 eax, edx;
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int err;
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unsigned long curr_temp_off = 0;
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*temp = 0;
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for_each_online_cpu(cpu) {
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err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
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&edx);
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if (err)
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goto err_ret;
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else {
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if (eax & 0x80000000) {
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curr_temp_off = (eax >> 16) & 0x7f;
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if (!*temp || curr_temp_off < *temp)
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*temp = curr_temp_off;
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} else {
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err = -EINVAL;
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goto err_ret;
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}
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}
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}
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return 0;
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err_ret:
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return err;
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}
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static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
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int *temp)
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{
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int ret;
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ret = read_temp_msr(temp);
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if (!ret)
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*temp = (stored_tjmax - *temp) * 1000;
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return ret;
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}
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static struct thermal_zone_device_ops proc_thermal_local_ops = {
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.get_temp = proc_thermal_get_zone_temp,
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};
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static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
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{
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int i;
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acpi_status status;
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *elements, *ppcc;
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union acpi_object *p;
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int ret = 0;
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status = acpi_evaluate_object(proc_priv->adev->handle, "PPCC",
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NULL, &buf);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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p = buf.pointer;
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if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
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dev_err(proc_priv->dev, "Invalid PPCC data\n");
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ret = -EFAULT;
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goto free_buffer;
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}
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if (!p->package.count) {
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dev_err(proc_priv->dev, "Invalid PPCC package size\n");
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ret = -EFAULT;
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goto free_buffer;
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}
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for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
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elements = &(p->package.elements[i+1]);
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if (elements->type != ACPI_TYPE_PACKAGE ||
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elements->package.count != 6) {
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ret = -EFAULT;
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goto free_buffer;
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}
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ppcc = elements->package.elements;
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proc_priv->power_limits[i].index = ppcc[0].integer.value;
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proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
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proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
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proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
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proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
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proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
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}
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free_buffer:
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kfree(buf.pointer);
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return ret;
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}
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#define PROC_POWER_CAPABILITY_CHANGED 0x83
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static void proc_thermal_notify(acpi_handle handle, u32 event, void *data)
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{
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struct proc_thermal_device *proc_priv = data;
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if (!proc_priv)
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return;
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switch (event) {
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case PROC_POWER_CAPABILITY_CHANGED:
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proc_thermal_read_ppcc(proc_priv);
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int340x_thermal_zone_device_update(proc_priv->int340x_zone,
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THERMAL_DEVICE_POWER_CAPABILITY_CHANGED);
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break;
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default:
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dev_err(proc_priv->dev, "Unsupported event [0x%x]\n", event);
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break;
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}
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}
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static int proc_thermal_add(struct device *dev,
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struct proc_thermal_device **priv)
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{
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struct proc_thermal_device *proc_priv;
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struct acpi_device *adev;
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acpi_status status;
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unsigned long long tmp;
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struct thermal_zone_device_ops *ops = NULL;
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int ret;
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adev = ACPI_COMPANION(dev);
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if (!adev)
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return -ENODEV;
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proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
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if (!proc_priv)
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return -ENOMEM;
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proc_priv->dev = dev;
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proc_priv->adev = adev;
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*priv = proc_priv;
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ret = proc_thermal_read_ppcc(proc_priv);
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if (!ret) {
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ret = sysfs_create_group(&dev->kobj,
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&power_limit_attribute_group);
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}
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if (ret)
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return ret;
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status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
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if (ACPI_FAILURE(status)) {
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/* there is no _TMP method, add local method */
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stored_tjmax = get_tjmax();
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if (stored_tjmax > 0)
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ops = &proc_thermal_local_ops;
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}
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proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
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if (IS_ERR(proc_priv->int340x_zone)) {
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ret = PTR_ERR(proc_priv->int340x_zone);
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goto remove_group;
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} else
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ret = 0;
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ret = acpi_install_notify_handler(adev->handle, ACPI_DEVICE_NOTIFY,
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proc_thermal_notify,
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(void *)proc_priv);
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if (ret)
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goto remove_zone;
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return 0;
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remove_zone:
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int340x_thermal_zone_remove(proc_priv->int340x_zone);
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remove_group:
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sysfs_remove_group(&proc_priv->dev->kobj,
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&power_limit_attribute_group);
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return ret;
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}
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static void proc_thermal_remove(struct proc_thermal_device *proc_priv)
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{
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acpi_remove_notify_handler(proc_priv->adev->handle,
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ACPI_DEVICE_NOTIFY, proc_thermal_notify);
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int340x_thermal_zone_remove(proc_priv->int340x_zone);
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sysfs_remove_group(&proc_priv->dev->kobj,
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&power_limit_attribute_group);
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}
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static int int3401_add(struct platform_device *pdev)
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{
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struct proc_thermal_device *proc_priv;
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int ret;
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if (proc_thermal_emum_mode == PROC_THERMAL_PCI) {
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dev_err(&pdev->dev, "error: enumerated as PCI dev\n");
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return -ENODEV;
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}
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ret = proc_thermal_add(&pdev->dev, &proc_priv);
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if (ret)
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return ret;
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platform_set_drvdata(pdev, proc_priv);
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proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV;
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return 0;
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}
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static int int3401_remove(struct platform_device *pdev)
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{
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proc_thermal_remove(platform_get_drvdata(pdev));
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return 0;
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}
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static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)
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{
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struct proc_thermal_device *proc_priv;
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struct pci_dev *pdev = devid;
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proc_priv = pci_get_drvdata(pdev);
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intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);
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return IRQ_HANDLED;
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}
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static int proc_thermal_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *unused)
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{
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struct proc_thermal_device *proc_priv;
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int ret;
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if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) {
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dev_err(&pdev->dev, "error: enumerated as platform dev\n");
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return -ENODEV;
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}
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ret = pci_enable_device(pdev);
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if (ret < 0) {
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dev_err(&pdev->dev, "error: could not enable device\n");
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return ret;
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}
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ret = proc_thermal_add(&pdev->dev, &proc_priv);
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if (ret) {
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pci_disable_device(pdev);
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return ret;
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}
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pci_set_drvdata(pdev, proc_priv);
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proc_thermal_emum_mode = PROC_THERMAL_PCI;
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if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) {
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/*
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* Enumerate additional DTS sensors available via IOSF.
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* But we are not treating as a failure condition, if
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* there are no aux DTSs enabled or fails. This driver
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* already exposes sensors, which can be accessed via
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* ACPI/MSR. So we don't want to fail for auxiliary DTSs.
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*/
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proc_priv->soc_dts = intel_soc_dts_iosf_init(
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INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0);
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if (proc_priv->soc_dts && pdev->irq) {
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ret = pci_enable_msi(pdev);
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if (!ret) {
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ret = request_threaded_irq(pdev->irq, NULL,
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proc_thermal_pci_msi_irq,
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IRQF_ONESHOT, "proc_thermal",
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pdev);
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if (ret) {
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intel_soc_dts_iosf_exit(
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proc_priv->soc_dts);
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pci_disable_msi(pdev);
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proc_priv->soc_dts = NULL;
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}
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}
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} else
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dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");
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}
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return 0;
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}
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static void proc_thermal_pci_remove(struct pci_dev *pdev)
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{
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struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);
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if (proc_priv->soc_dts) {
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intel_soc_dts_iosf_exit(proc_priv->soc_dts);
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if (pdev->irq) {
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free_irq(pdev->irq, pdev);
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pci_disable_msi(pdev);
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}
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}
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proc_thermal_remove(proc_priv);
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pci_disable_device(pdev);
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}
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static const struct pci_device_id proc_thermal_pci_ids[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BDW_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_HSB_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_SKL_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BSW_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT0_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXT1_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTX_THERMAL)},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BXTP_THERMAL)},
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);
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static struct pci_driver proc_thermal_pci_driver = {
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.name = "proc_thermal",
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.probe = proc_thermal_pci_probe,
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.remove = proc_thermal_pci_remove,
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.id_table = proc_thermal_pci_ids,
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};
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static const struct acpi_device_id int3401_device_ids[] = {
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{"INT3401", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, int3401_device_ids);
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static struct platform_driver int3401_driver = {
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.probe = int3401_add,
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.remove = int3401_remove,
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.driver = {
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.name = "int3401 thermal",
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.acpi_match_table = int3401_device_ids,
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},
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};
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static int __init proc_thermal_init(void)
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{
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int ret;
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ret = platform_driver_register(&int3401_driver);
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if (ret)
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return ret;
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ret = pci_register_driver(&proc_thermal_pci_driver);
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return ret;
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}
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static void __exit proc_thermal_exit(void)
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{
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platform_driver_unregister(&int3401_driver);
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pci_unregister_driver(&proc_thermal_pci_driver);
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}
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module_init(proc_thermal_init);
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module_exit(proc_thermal_exit);
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MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
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MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
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MODULE_LICENSE("GPL v2");
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