mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 10:36:42 +07:00
512d1027a6
This CPU family provides NB register values to gather following TDP information * ProcessorPwrWatts: Specifies in Watts the maximum amount of power the processor can support. * CurrPwrWatts: Specifies in Watts the current amount of power being consumed by the processor. This driver provides * power1_crit (ProcessorPwrWatts) * power1_input (CurrPwrWatts) Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
230 lines
5.9 KiB
C
230 lines
5.9 KiB
C
/*
|
|
* fam15h_power.c - AMD Family 15h processor power monitoring
|
|
*
|
|
* Copyright (c) 2011 Advanced Micro Devices, Inc.
|
|
* Author: Andreas Herrmann <andreas.herrmann3@amd.com>
|
|
*
|
|
*
|
|
* This driver is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This driver 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this driver; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/hwmon.h>
|
|
#include <linux/hwmon-sysfs.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/processor.h>
|
|
|
|
MODULE_DESCRIPTION("AMD Family 15h CPU processor power monitor");
|
|
MODULE_AUTHOR("Andreas Herrmann <andreas.herrmann3@amd.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* D18F3 */
|
|
#define REG_NORTHBRIDGE_CAP 0xe8
|
|
|
|
/* D18F4 */
|
|
#define REG_PROCESSOR_TDP 0x1b8
|
|
|
|
/* D18F5 */
|
|
#define REG_TDP_RUNNING_AVERAGE 0xe0
|
|
#define REG_TDP_LIMIT3 0xe8
|
|
|
|
struct fam15h_power_data {
|
|
struct device *hwmon_dev;
|
|
unsigned int tdp_to_watts;
|
|
unsigned int base_tdp;
|
|
unsigned int processor_pwr_watts;
|
|
};
|
|
|
|
static ssize_t show_power(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
u32 val, tdp_limit, running_avg_range;
|
|
s32 running_avg_capture;
|
|
u64 curr_pwr_watts;
|
|
struct pci_dev *f4 = to_pci_dev(dev);
|
|
struct fam15h_power_data *data = dev_get_drvdata(dev);
|
|
|
|
pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),
|
|
REG_TDP_RUNNING_AVERAGE, &val);
|
|
running_avg_capture = (val >> 4) & 0x3fffff;
|
|
running_avg_capture = sign_extend32(running_avg_capture, 22);
|
|
running_avg_range = val & 0xf;
|
|
|
|
pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),
|
|
REG_TDP_LIMIT3, &val);
|
|
|
|
tdp_limit = val >> 16;
|
|
curr_pwr_watts = tdp_limit + data->base_tdp -
|
|
(s32)(running_avg_capture >> (running_avg_range + 1));
|
|
curr_pwr_watts *= data->tdp_to_watts;
|
|
|
|
/*
|
|
* Convert to microWatt
|
|
*
|
|
* power is in Watt provided as fixed point integer with
|
|
* scaling factor 1/(2^16). For conversion we use
|
|
* (10^6)/(2^16) = 15625/(2^10)
|
|
*/
|
|
curr_pwr_watts = (curr_pwr_watts * 15625) >> 10;
|
|
return sprintf(buf, "%u\n", (unsigned int) curr_pwr_watts);
|
|
}
|
|
static DEVICE_ATTR(power1_input, S_IRUGO, show_power, NULL);
|
|
|
|
static ssize_t show_power_crit(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct fam15h_power_data *data = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%u\n", data->processor_pwr_watts);
|
|
}
|
|
static DEVICE_ATTR(power1_crit, S_IRUGO, show_power_crit, NULL);
|
|
|
|
static ssize_t show_name(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "fam15h_power\n");
|
|
}
|
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
|
|
|
|
static struct attribute *fam15h_power_attrs[] = {
|
|
&dev_attr_power1_input.attr,
|
|
&dev_attr_power1_crit.attr,
|
|
&dev_attr_name.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group fam15h_power_attr_group = {
|
|
.attrs = fam15h_power_attrs,
|
|
};
|
|
|
|
static bool __devinit fam15h_power_is_internal_node0(struct pci_dev *f4)
|
|
{
|
|
u32 val;
|
|
|
|
pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 3),
|
|
REG_NORTHBRIDGE_CAP, &val);
|
|
if ((val & BIT(29)) && ((val >> 30) & 3))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static void __devinit fam15h_power_init_data(struct pci_dev *f4,
|
|
struct fam15h_power_data *data)
|
|
{
|
|
u32 val;
|
|
u64 tmp;
|
|
|
|
pci_read_config_dword(f4, REG_PROCESSOR_TDP, &val);
|
|
data->base_tdp = val >> 16;
|
|
tmp = val & 0xffff;
|
|
|
|
pci_bus_read_config_dword(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5),
|
|
REG_TDP_LIMIT3, &val);
|
|
|
|
data->tdp_to_watts = ((val & 0x3ff) << 6) | ((val >> 10) & 0x3f);
|
|
tmp *= data->tdp_to_watts;
|
|
|
|
/* result not allowed to be >= 256W */
|
|
if ((tmp >> 16) >= 256)
|
|
dev_warn(&f4->dev, "Bogus value for ProcessorPwrWatts "
|
|
"(processor_pwr_watts>=%u)\n",
|
|
(unsigned int) (tmp >> 16));
|
|
|
|
/* convert to microWatt */
|
|
data->processor_pwr_watts = (tmp * 15625) >> 10;
|
|
}
|
|
|
|
static int __devinit fam15h_power_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct fam15h_power_data *data;
|
|
struct device *dev;
|
|
int err;
|
|
|
|
if (!fam15h_power_is_internal_node0(pdev)) {
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
data = kzalloc(sizeof(struct fam15h_power_data), GFP_KERNEL);
|
|
if (!data) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
fam15h_power_init_data(pdev, data);
|
|
dev = &pdev->dev;
|
|
|
|
dev_set_drvdata(dev, data);
|
|
err = sysfs_create_group(&dev->kobj, &fam15h_power_attr_group);
|
|
if (err)
|
|
goto exit_free_data;
|
|
|
|
data->hwmon_dev = hwmon_device_register(dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove_group;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove_group:
|
|
sysfs_remove_group(&dev->kobj, &fam15h_power_attr_group);
|
|
exit_free_data:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static void __devexit fam15h_power_remove(struct pci_dev *pdev)
|
|
{
|
|
struct device *dev;
|
|
struct fam15h_power_data *data;
|
|
|
|
dev = &pdev->dev;
|
|
data = dev_get_drvdata(dev);
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&dev->kobj, &fam15h_power_attr_group);
|
|
dev_set_drvdata(dev, NULL);
|
|
kfree(data);
|
|
}
|
|
|
|
static DEFINE_PCI_DEVICE_TABLE(fam15h_power_id_table) = {
|
|
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_F4) },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, fam15h_power_id_table);
|
|
|
|
static struct pci_driver fam15h_power_driver = {
|
|
.name = "fam15h_power",
|
|
.id_table = fam15h_power_id_table,
|
|
.probe = fam15h_power_probe,
|
|
.remove = __devexit_p(fam15h_power_remove),
|
|
};
|
|
|
|
static int __init fam15h_power_init(void)
|
|
{
|
|
return pci_register_driver(&fam15h_power_driver);
|
|
}
|
|
|
|
static void __exit fam15h_power_exit(void)
|
|
{
|
|
pci_unregister_driver(&fam15h_power_driver);
|
|
}
|
|
|
|
module_init(fam15h_power_init)
|
|
module_exit(fam15h_power_exit)
|