From: Andreas Herrmann <andreas.herrmann3@xxxxxxx> 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_cap (ProcessorPwrWatts) * power1_input (CurrPwrWatts) Changes from v1:: - removed deprecated code line, - fixed comment, - report power only once per socket (Power information is provided for the entire package. On multi-node processors it should only be reported on internal node 0.) Signed-off-by: Andreas Herrmann <andreas.herrmann3@xxxxxxx> --- drivers/hwmon/Kconfig | 10 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/f15h_power.c | 216 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 227 insertions(+), 0 deletions(-) create mode 100644 drivers/hwmon/f15h_power.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 8e84b31..0268623 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -249,6 +249,16 @@ config SENSORS_K10TEMP This driver can also be built as a module. If so, the module will be called k10temp. +config SENSORS_F15H_POWER + tristate "AMD Family 15h processor power" + depends on X86 && PCI + help + If you say yes here you get support for processor power + information of your AMD family 15h CPU. + + This driver can also be built as a module. If so, the module + will be called f15hpower. + config SENSORS_ASB100 tristate "Asus ASB100 Bach" depends on X86 && I2C && EXPERIMENTAL diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index dde02d9..e554b88 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_SENSORS_JC42) += jc42.o obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o +obj-$(CONFIG_SENSORS_F15H_POWER) += f15h_power.o obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o hp_accel.o obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d.o lis3lv02d_spi.o obj-$(CONFIG_SENSORS_LIS3_I2C) += lis3lv02d.o lis3lv02d_i2c.o diff --git a/drivers/hwmon/f15h_power.c b/drivers/hwmon/f15h_power.c new file mode 100644 index 0000000..40e3cbd --- /dev/null +++ b/drivers/hwmon/f15h_power.c @@ -0,0 +1,216 @@ +/* + * f15h_power.c - AMD Family 15h processor power monitoring + * + * Copyright (c) 2011 Advanced Micro Devices, Inc. + * Author: Andreas Herrmann <andreas.herrmann3@xxxxxxx> + * + * + * 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@xxxxxxx>"); +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 + +static ssize_t show_power(struct device *dev, + struct device_attribute *attr, char *buf) +{ + u32 val, btdp, tdpl, tdp2w, arange; + s32 acap; + u64 ctdp; + struct pci_dev *f4 = to_pci_dev(dev); + struct pci_dev *f5; + + pci_read_config_dword(f4, REG_PROCESSOR_TDP, &val); + btdp = (val >> 16) & 0xffff; + + f5 = pci_get_slot(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5)); + if (!f5) { + dev_err(dev, "no function 5 available on this slot\n"); + return 0; + } + + pci_read_config_dword(f5, REG_TDP_RUNNING_AVERAGE, &val); + acap = (val >> 4) & 0x3fffff; + acap = sign_extend32(acap, 22); + arange = val & 0xf; + + pci_read_config_dword(f5, REG_TDP_LIMIT3, &val); + pci_dev_put(f5); + + tdpl = (val >> 16) & 0x1fff; + tdp2w = ((val & 0x3ff) << 6) | ((val >> 10) & 0x3f); + ctdp = tdpl - (s32)(acap >> (arange + 1)) + btdp; + ctdp *= tdp2w; + + /* + * 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) + */ + ctdp = (ctdp * 15625) >> 10; + return sprintf(buf, "%d\n", (u32) ctdp); +} +static DEVICE_ATTR(power1_input, S_IRUGO, show_power, NULL); + +static ssize_t show_power_cap(struct device *dev, + struct device_attribute *attr, char *buf) +{ + u32 val, tdp2w; + u64 ptdp; + struct pci_dev *f4 = to_pci_dev(dev); + struct pci_dev *f5; + + pci_read_config_dword(f4, REG_PROCESSOR_TDP, &val); + ptdp = val & 0xffff; + + f5 = pci_get_slot(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 5)); + if (!f5) { + dev_err(dev, "no function 5 available on this slot\n"); + return 0; + } + + pci_read_config_dword(f5, REG_TDP_LIMIT3, &val); + pci_dev_put(f5); + + tdp2w = ((val & 0x3ff) << 6) | ((val >> 10) & 0x3f); + ptdp *= tdp2w; + + /* result not allowed to be >= 256W */ + WARN_ON(ptdp>>16 >= 256); + + /* convert to microWatt */ + ptdp = (ptdp * 15625) >> 10; + return sprintf(buf, "%d\n", (u32) ptdp); +} +static DEVICE_ATTR(power1_cap, S_IRUGO, show_power_cap, NULL); + +static ssize_t show_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "f15h_power\n"); +} +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + +static int __devinit f15h_power_is_internal_node0(struct pci_dev *f4) +{ + u32 val; + struct pci_dev *f3; + + f3 = pci_get_slot(f4->bus, PCI_DEVFN(PCI_SLOT(f4->devfn), 3)); + if (!f3) { + dev_err(&f4->dev, "no function 3 available on this slot\n"); + return 0; + } + + pci_read_config_dword(f3, REG_NORTHBRIDGE_CAP, &val); + pci_dev_put(f3); + + if ((val & BIT(29)) && ((val >> 30) & 3)) + return 0; + + return 1; +} + +static int __devinit f15h_power_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct device *hwmon_dev; + int err = -ENODEV; + + if (!f15h_power_is_internal_node0(pdev)) + goto exit; + + err = device_create_file(&pdev->dev, &dev_attr_power1_input); + if (err) + goto exit; + err = device_create_file(&pdev->dev, &dev_attr_power1_cap); + if (err) + goto exit_remove; + + err = device_create_file(&pdev->dev, &dev_attr_name); + if (err) + goto exit_remove; + + hwmon_dev = hwmon_device_register(&pdev->dev); + if (IS_ERR(hwmon_dev)) { + err = PTR_ERR(hwmon_dev); + goto exit_remove; + } + dev_set_drvdata(&pdev->dev, hwmon_dev); + + return 0; + +exit_remove: + device_remove_file(&pdev->dev, &dev_attr_name); + device_remove_file(&pdev->dev, &dev_attr_power1_input); + device_remove_file(&pdev->dev, &dev_attr_power1_cap); +exit: + return err; +} + +static void __devexit f15h_power_remove(struct pci_dev *pdev) +{ + hwmon_device_unregister(dev_get_drvdata(&pdev->dev)); + device_remove_file(&pdev->dev, &dev_attr_name); + device_remove_file(&pdev->dev, &dev_attr_power1_input); + device_remove_file(&pdev->dev, &dev_attr_power1_cap); + dev_set_drvdata(&pdev->dev, NULL); +} + +static const struct pci_device_id f15h_power_id_table[] = { + { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_15H_NB_LINK) }, + {} +}; +MODULE_DEVICE_TABLE(pci, f15h_power_id_table); + +static struct pci_driver f15h_power_driver = { + .name = "f15h_power", + .id_table = f15h_power_id_table, + .probe = f15h_power_probe, + .remove = __devexit_p(f15h_power_remove), +}; + +static int __init f15h_power_init(void) +{ + return pci_register_driver(&f15h_power_driver); +} + +static void __exit f15h_power_exit(void) +{ + pci_unregister_driver(&f15h_power_driver); +} + +module_init(f15h_power_init) +module_exit(f15h_power_exit) -- 1.7.3.1 _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
