![Linus Torvalds](/assets/img/avatar_default.png)
Mostly cleanup. No new drivers this time around, but support for several chips added to existing drivers: TPS40400, TPS40422, MTD040, MAX34446, ZL9101M, ZL9117M, and LM96080. Also, added watchdog support for SCH56xx, and additional attributes for a couple of drivers.312869e
hwmon: (sch56xx) Add support for the integrated watchdog (v2)840e191
hwmon: (w83627ehf) Add support for temperature offset registers86dda17
hwmon: (jc42) Remove unnecessary device IDs3360a10
hwmon: (zl6100) Add support for ZL9101M and ZL9117M9271126
hwmon: (adm1275) Add support for ADM1075590defe
hwmon: (max34440) Add support for MAX3444660b873e
hwmon: (pmbus) Add more virtual registers2163340
hwmon: (pmbus) Add support for Lineage Power MDT040c5f35c9
hwmon: (pmbus) Add support for TI TPS40400 and TPS4042256aad5d
hwmon: (max34440) Add support for 'lowest' output voltage attributef15df57
hwmon: (jc42) Convert to use devm_kzalloc918ddef
hwmon: (max16065) Convert to use devm_kzallocb8a5a7c
hwmon: (smm665) Convert to use devm_kzalloc3683928
hwmon: (ltc4261) Convert to use devm_kzallocdd285ad
hwmon: (pmbus) Simplify remove functions8b313ca
hwmon: (pmbus) Convert pmbus drivers to use devm_kzalloc07404aa
hwmon: (lineage-pem) Convert to use devm_kzallocf352df6
hwmon: (hwmon-vid) Fix checkpatch issues 3230f70 hwmon: (hwmon-vid) Add new entries to VRM model table9908ad4
hwmon: (lm80) Add detection of NatSemi/TI LM960800e190b7
hwmon: (lm87) Get rid of macro-generated functions8652a26
hwmon: (lm87) Reorganize the code0fc86ec
hwmon: (applesmc) Silence uninitialized warnings7599d32
hwmon: (lm70) Fix: do not use assignment in if conditione200c14
hwmon: (lm70) Register hwmon device after creating attribute files, and remove it first01d9def
hwmon: (w83l786ng) Fix multi-line comments130067d
hwmon: (w83l785ts) Fix multi-line comments7950133
hwmon: (w83781d) Fix: do not use assignment in if conditionaff6e00
hwmon: (w83781d) Fix multi-line comments2a52dd6
hwmon: (smsc47b397) Fix multi-line comments36564ef
hwmon: (pc87427) Fix multi-line commentsb6707b7
hwmon: (max1668) Fix multi-line comments1160631
hwmon: (lm80) Fix multi-line commentsbf0f3a0
hwmon: (emc2103) Fix multi-line commentsfbb6670
hwmon: (adm1031) Fix multi-line comments94b991d
hwmon: (adm1029) Fix multi-line comments27b9de3
hwmon: (w83627hf) Fix checkpatch issuesca3ccad
hwmon: (w83l786ng) Fix checkpatch issues47efe87
hwmon: (w83793) Fix checkpatch issuesd174368
hwmon: (w83792d) Fix checkpatch issues2185696
hwmon: (vt1211) Fix: do not use assignment in if conditionb162c03
hwmon: (vt1211) Fix checkpatch issues9004ac8
hwmon: (via686a) Fix checkpatch issuesbce2778
hwmon: (pc87360) Fix: do not use assignment in if condition449a7a0
hwmon: (pc87360) Fix checkpatch issues8958dfb
hwmon: (max1619): Fix checkpatch issues09770b2
hwmon: (lm85) Fix checkpatch issues9b03079
hwmon: (lm78) Fix checkpatch issues02fe2fd
hwmon: (lm77) Fix checkpatch issuesf445a9a
hwmon: (gl520sm) Fix: do not use assignment in if condition43da3d1
hwmon: (gl520sm) Fix checkpatch issues228f8e0
hwmon: (gl518sm) Fix checkpatch issuesc8de836
hwmon: (dme1737) Fix checkpatch issues8c10369
hwmon: (asb100): Fix checkpatch issuesc387e4e
hwmon: (adm9240) Fix checkpatch issues86aa3e2
hwmon: (adm1026) Fix checkpatch issues21d2a8f
hwmon: (adm1021) Fix checkpatch issues1bd385d
hwmon: (abituguru) Fix checkpatch issues8969e84
hwmon: (w83627ehf) Fix multi-line comments51683ee
hwmon: (max1111) Fix multi-line comments1b05d22
hwmon: (ltc4151) Fix multi-line comments1b9c491
hwmon: (g760a) Fix multi-line comments20eaf72
hwmon: (f71882fg) Fix multi-line comments4bebced
hwmon: (emc1403) Fix multi-line commentsca3c7b6
hwmon: (amc6821) Fix multi-line comments10775d1
hwmon: (ads7871) Fix multi-line commentsd13d623
hwmon: (ads7828) Fix multi-line comments562fca2
hwmon: (abituguru3) Fix multi-line commentsec1c319
hwmon: (w83791d) Fix checkpatch issuesa80b10c
hwmon: (ultra45_env) Fix checkpatch issues4d387df
hwmon: (thmc50) Fix checkpatch issues85a0c0d
hwmon: (smsc47m1) Fix checkpatch issues7e61268
hwmon: (smsc47m1) Fix: do not use assignment in if condition7cc3cb6
hwmon: (smsc47m192) Fix checkpatch issues 8fda79e hwmon: (sis5595) Fix checkpatch issues5725608
hwmon: (pcf8591) Fix checkpatch issues 2804a4c hwmon: (lm93) Fix checkpatch issuesa318afd
hwmon: (lm92) Fix checkpatch issues073f1e6c
hwmon: (lm87) Fix: do not use assignment in if conditionc6370db
hwmon: (lm87) Fix checkpatch issues525ad37
hwmon: (fschmd) Fix checkpatch issuesf24d548
hwmon: (atxp1) Fix checkpatch issues724cc33
hwmon: (adt7462) Fix checkpatch issues790fa38
hwmon: (ltc4215) Fix multi-line comments430b4fc
hwmon: (ltc4245) Fix multi-line commentsa68abd3
hwmon: (wm8350-hwmon) Constify fixed string array85ebfd3
hwmon: (applesmc) Fix multi-line comments75bdc93
hwmon: (asus_atk0110) Fix multi-line comments3c4c497
hwmon: (it87) Constify fixed string arrays8deeac8
hwmon: (ad7414) Fix multi-line comments5d577db
hwmon: (jc42) Fix multi-line comments780affe
hwmon: (coretemp) Fix checkpatch error3af2861
hwmon: (pc87360) Fix multi-line comments07de3df
hwmon: (wm831x-hwmon) Fix multi-line comments3c22e23
hwmon: (smm665) Fix checkpatch error3c56b06
hwmon: (asc7621) Fix multi-line comments4a0d71c
hwmon: (it87) Fix multi-line comments86d566e
hwmon: (hwmon-vid) Fix multi-line comments5ed0488
hwmon: (hwmon) Fix multi-line comments19f2c05
hwmon: (ds1621) Fix checkpatch issues91efffe
hwmon: convert drivers/hwmon/* to use module_spi_driver()f0967ee
hwmon: convert drivers/hwmon/* to use module_i2c_driver()61ba031
hwmon: (vt8231) Fix multi-line comments9ed5bc2
hwmon: (adt7475) Fix multi-line comments2fff084
hwmon: (f71805f) Fix checkpatch issues703af96
hwmon: (max6650) Fix multi-line commentsc531eb3
hwmon: (w83781d) Fix checkpatch issues2b22de5
hwmon: (adm1025) Fix checkpatch issues7973841
hwmon: (abituguru3) Fix checkpatch issues65fe5c7
hwmon: (vt8231) Fix checkpatch issues bafda5d hwmon: (max6650) Fix checkpatch issues0117c3f
hwmon: (pmbus) Replace strict_strtol with kstrtolb3789a0
hwmon: (lm83) fix checkpatch issues93092a6
hwmon: (k8temp) fix checkpatch issues96585f1
hwmon: (lm80) reset device if error occurred6a9e7c4c
hwmon: (lm80) fix checkpatch warnings6b904b6
hwmon: (adt7470) fix checkpatch issuese6a83db
hwmon: (adt7411) fix checkpatch issues56c24af
hwmon: (lm70) fix checkpatch issues1dc3708
hwmon: (f71882fg) fix checkpatch issuesc6e8ac0
hwmon: (asus_atk0110) fix checkpatch issues99b8c83
hwmon: (adt7475) fix checkpatch issuesb2ae8f8
hwmon: (smm665) fix checkpatch issuesc9e1498
hwmon: (sht15) fix checkpatch issues0910b28
hwmon: (ibmaem) fix checkpatch issuesdcb7cb9
hwmon: (ad7414) fix checkpatch issues e91aef2 hwmon: (ad7418) fix checkpatch issues5996542
hwmon: (w83l785ts) fix checkpatch issuesa6100f6
hwmon: (wm831x-hwmon) fix checkpatch issues839a9ee
hwmon: fix checkpatch issues08f5090
hwmon: (adm1029) fix checkpatch issues4d7c5d4
hwmon: (g760a) fix checkpatch issues7b102ed
hwmon: (i5k_amb) fix checkpatch issues600151b
hwmon: use DEFINE_PCI_DEVICE_TABLE7fe83ad
hwmon: remove () used with returna6bee4a
hwmon: (amc6821) fix initialisation2faaa93
hwmon: (lm80) add error handling -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQIcBAABAgAGBQJPaJBFAAoJEMsfJm/On5mBhkMP/09vlmsG7J3TLHcSKYJBkvSx 6VNOOJgPqnvF71Az0dX47SU3zVXhG3I7dZufd/hqOK+0CNylSB7OSZMcWvBTduea 0hDLTYj++SyVDQfVXb3zCVLU/wAE3YuXB3umWPwAKit4s2wAYYRDVCjwK96B88rv llNvo6JryuJDBUq7xiEmr0vKWMO0mKwwjpMTGCD3NpzK02ZV49T0gM94xa4gi5nM QAhNeO1AzQTx0+mBSRlq+SBBLSiXQmHcNrhnxcRMPha1bEi1D+QESozsczr+9/lz 8vuTIULOIZxafM4XkBsZdknvlZnYrA6ukituDfVfiYQVcljO/cNu+seutFQDCMJe 1zTDoNGIAwwnw0sAWWmTQwUMi+GSvlaL20gmm8FhTlvQaj9hNETsPYxEvPEsBNY1 ICCixZcwpa1mZBXmryz2btf8az0OlX/sApzyHiq24B7lSE5Fv4tBDtwypLRu5N8m C4oNXC2dqDU0gtVxzO5Lavu6LHWV9lhyZvRPO75+zxYt4i5cnO04GTAYWh46aOzO DAZcs8M2Rj++dI5VW9Vl0k8hP9eWjxtPJFhNv/OWTx4YYQRICrde+j7QZcikIUWF 0bzYI/zeIcwOg059vhnglBFM3mr7Z92jm4mftcNaSj/zuUHbWf6AQLbIq86Zq7tF 3Eru3WuTZTwAkyNAVWd5 =cUoW -----END PGP SIGNATURE----- Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon changes for v3.4 from Guenter Roeck: "Mostly cleanup. No new drivers this time around, but support for several chips added to existing drivers: TPS40400, TPS40422, MTD040, MAX34446, ZL9101M, ZL9117M, and LM96080. Also, added watchdog support for SCH56xx, and additional attributes for a couple of drivers." * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (137 commits) hwmon: (sch56xx) Add support for the integrated watchdog (v2) hwmon: (w83627ehf) Add support for temperature offset registers hwmon: (jc42) Remove unnecessary device IDs hwmon: (zl6100) Add support for ZL9101M and ZL9117M hwmon: (adm1275) Add support for ADM1075 hwmon: (max34440) Add support for MAX34446 hwmon: (pmbus) Add more virtual registers hwmon: (pmbus) Add support for Lineage Power MDT040 hwmon: (pmbus) Add support for TI TPS40400 and TPS40422 hwmon: (max34440) Add support for 'lowest' output voltage attribute hwmon: (jc42) Convert to use devm_kzalloc hwmon: (max16065) Convert to use devm_kzalloc hwmon: (smm665) Convert to use devm_kzalloc hwmon: (ltc4261) Convert to use devm_kzalloc hwmon: (pmbus) Simplify remove functions hwmon: (pmbus) Convert pmbus drivers to use devm_kzalloc hwmon: (lineage-pem) Convert to use devm_kzalloc hwmon: (hwmon-vid) Fix checkpatch issues hwmon: (hwmon-vid) Add new entries to VRM model table hwmon: (lm80) Add detection of NatSemi/TI LM96080 ...
827 lines
21 KiB
C
827 lines
21 KiB
C
/*
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* coretemp.c - Linux kernel module for hardware monitoring
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*
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* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
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*
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* Inspired from many hwmon drivers
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/hwmon.h>
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#include <linux/sysfs.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/platform_device.h>
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#include <linux/cpu.h>
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#include <linux/pci.h>
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#include <linux/smp.h>
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#include <linux/moduleparam.h>
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#include <asm/msr.h>
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#include <asm/processor.h>
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#include <asm/cpu_device_id.h>
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#define DRVNAME "coretemp"
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/*
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* force_tjmax only matters when TjMax can't be read from the CPU itself.
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* When set, it replaces the driver's suboptimal heuristic.
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*/
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static int force_tjmax;
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module_param_named(tjmax, force_tjmax, int, 0444);
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MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius");
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#define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */
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#define NUM_REAL_CORES 16 /* Number of Real cores per cpu */
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#define CORETEMP_NAME_LENGTH 17 /* String Length of attrs */
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#define MAX_CORE_ATTRS 4 /* Maximum no of basic attrs */
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#define TOTAL_ATTRS (MAX_CORE_ATTRS + 1)
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#define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO)
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#define TO_PHYS_ID(cpu) (cpu_data(cpu).phys_proc_id)
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#define TO_CORE_ID(cpu) (cpu_data(cpu).cpu_core_id)
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#define TO_ATTR_NO(cpu) (TO_CORE_ID(cpu) + BASE_SYSFS_ATTR_NO)
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#ifdef CONFIG_SMP
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#define for_each_sibling(i, cpu) for_each_cpu(i, cpu_sibling_mask(cpu))
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#else
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#define for_each_sibling(i, cpu) for (i = 0; false; )
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#endif
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/*
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* Per-Core Temperature Data
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* @last_updated: The time when the current temperature value was updated
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* earlier (in jiffies).
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* @cpu_core_id: The CPU Core from which temperature values should be read
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* This value is passed as "id" field to rdmsr/wrmsr functions.
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* @status_reg: One of IA32_THERM_STATUS or IA32_PACKAGE_THERM_STATUS,
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* from where the temperature values should be read.
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* @attr_size: Total number of pre-core attrs displayed in the sysfs.
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* @is_pkg_data: If this is 1, the temp_data holds pkgtemp data.
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* Otherwise, temp_data holds coretemp data.
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* @valid: If this is 1, the current temperature is valid.
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*/
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struct temp_data {
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int temp;
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int ttarget;
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int tjmax;
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unsigned long last_updated;
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unsigned int cpu;
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u32 cpu_core_id;
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u32 status_reg;
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int attr_size;
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bool is_pkg_data;
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bool valid;
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struct sensor_device_attribute sd_attrs[TOTAL_ATTRS];
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char attr_name[TOTAL_ATTRS][CORETEMP_NAME_LENGTH];
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struct mutex update_lock;
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};
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/* Platform Data per Physical CPU */
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struct platform_data {
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struct device *hwmon_dev;
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u16 phys_proc_id;
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struct temp_data *core_data[MAX_CORE_DATA];
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struct device_attribute name_attr;
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};
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struct pdev_entry {
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struct list_head list;
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struct platform_device *pdev;
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u16 phys_proc_id;
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};
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static LIST_HEAD(pdev_list);
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static DEFINE_MUTEX(pdev_list_mutex);
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static ssize_t show_name(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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return sprintf(buf, "%s\n", DRVNAME);
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}
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static ssize_t show_label(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct platform_data *pdata = dev_get_drvdata(dev);
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struct temp_data *tdata = pdata->core_data[attr->index];
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if (tdata->is_pkg_data)
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return sprintf(buf, "Physical id %u\n", pdata->phys_proc_id);
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return sprintf(buf, "Core %u\n", tdata->cpu_core_id);
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}
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static ssize_t show_crit_alarm(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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u32 eax, edx;
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct platform_data *pdata = dev_get_drvdata(dev);
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struct temp_data *tdata = pdata->core_data[attr->index];
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rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
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return sprintf(buf, "%d\n", (eax >> 5) & 1);
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}
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static ssize_t show_tjmax(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct platform_data *pdata = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", pdata->core_data[attr->index]->tjmax);
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}
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static ssize_t show_ttarget(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct platform_data *pdata = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", pdata->core_data[attr->index]->ttarget);
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}
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static ssize_t show_temp(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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u32 eax, edx;
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct platform_data *pdata = dev_get_drvdata(dev);
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struct temp_data *tdata = pdata->core_data[attr->index];
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mutex_lock(&tdata->update_lock);
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/* Check whether the time interval has elapsed */
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if (!tdata->valid || time_after(jiffies, tdata->last_updated + HZ)) {
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rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
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tdata->valid = 0;
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/* Check whether the data is valid */
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if (eax & 0x80000000) {
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tdata->temp = tdata->tjmax -
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((eax >> 16) & 0x7f) * 1000;
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tdata->valid = 1;
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}
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tdata->last_updated = jiffies;
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}
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mutex_unlock(&tdata->update_lock);
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return tdata->valid ? sprintf(buf, "%d\n", tdata->temp) : -EAGAIN;
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}
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static int __cpuinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id,
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struct device *dev)
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{
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/* The 100C is default for both mobile and non mobile CPUs */
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int tjmax = 100000;
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int tjmax_ee = 85000;
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int usemsr_ee = 1;
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int err;
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u32 eax, edx;
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struct pci_dev *host_bridge;
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/* Early chips have no MSR for TjMax */
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if (c->x86_model == 0xf && c->x86_mask < 4)
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usemsr_ee = 0;
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/* Atom CPUs */
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if (c->x86_model == 0x1c) {
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usemsr_ee = 0;
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host_bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
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if (host_bridge && host_bridge->vendor == PCI_VENDOR_ID_INTEL
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&& (host_bridge->device == 0xa000 /* NM10 based nettop */
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|| host_bridge->device == 0xa010)) /* NM10 based netbook */
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tjmax = 100000;
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else
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tjmax = 90000;
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pci_dev_put(host_bridge);
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}
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if (c->x86_model > 0xe && usemsr_ee) {
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u8 platform_id;
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/*
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* Now we can detect the mobile CPU using Intel provided table
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* http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
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* For Core2 cores, check MSR 0x17, bit 28 1 = Mobile CPU
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*/
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err = rdmsr_safe_on_cpu(id, 0x17, &eax, &edx);
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if (err) {
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dev_warn(dev,
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"Unable to access MSR 0x17, assuming desktop"
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" CPU\n");
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usemsr_ee = 0;
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} else if (c->x86_model < 0x17 && !(eax & 0x10000000)) {
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/*
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* Trust bit 28 up to Penryn, I could not find any
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* documentation on that; if you happen to know
|
|
* someone at Intel please ask
|
|
*/
|
|
usemsr_ee = 0;
|
|
} else {
|
|
/* Platform ID bits 52:50 (EDX starts at bit 32) */
|
|
platform_id = (edx >> 18) & 0x7;
|
|
|
|
/*
|
|
* Mobile Penryn CPU seems to be platform ID 7 or 5
|
|
* (guesswork)
|
|
*/
|
|
if (c->x86_model == 0x17 &&
|
|
(platform_id == 5 || platform_id == 7)) {
|
|
/*
|
|
* If MSR EE bit is set, set it to 90 degrees C,
|
|
* otherwise 105 degrees C
|
|
*/
|
|
tjmax_ee = 90000;
|
|
tjmax = 105000;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (usemsr_ee) {
|
|
err = rdmsr_safe_on_cpu(id, 0xee, &eax, &edx);
|
|
if (err) {
|
|
dev_warn(dev,
|
|
"Unable to access MSR 0xEE, for Tjmax, left"
|
|
" at default\n");
|
|
} else if (eax & 0x40000000) {
|
|
tjmax = tjmax_ee;
|
|
}
|
|
} else if (tjmax == 100000) {
|
|
/*
|
|
* If we don't use msr EE it means we are desktop CPU
|
|
* (with exeception of Atom)
|
|
*/
|
|
dev_warn(dev, "Using relative temperature scale!\n");
|
|
}
|
|
|
|
return tjmax;
|
|
}
|
|
|
|
static int __cpuinit get_tjmax(struct cpuinfo_x86 *c, u32 id,
|
|
struct device *dev)
|
|
{
|
|
int err;
|
|
u32 eax, edx;
|
|
u32 val;
|
|
|
|
/*
|
|
* A new feature of current Intel(R) processors, the
|
|
* IA32_TEMPERATURE_TARGET contains the TjMax value
|
|
*/
|
|
err = rdmsr_safe_on_cpu(id, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
|
|
if (err) {
|
|
if (c->x86_model > 0xe && c->x86_model != 0x1c)
|
|
dev_warn(dev, "Unable to read TjMax from CPU %u\n", id);
|
|
} else {
|
|
val = (eax >> 16) & 0xff;
|
|
/*
|
|
* If the TjMax is not plausible, an assumption
|
|
* will be used
|
|
*/
|
|
if (val) {
|
|
dev_dbg(dev, "TjMax is %d degrees C\n", val);
|
|
return val * 1000;
|
|
}
|
|
}
|
|
|
|
if (force_tjmax) {
|
|
dev_notice(dev, "TjMax forced to %d degrees C by user\n",
|
|
force_tjmax);
|
|
return force_tjmax * 1000;
|
|
}
|
|
|
|
/*
|
|
* An assumption is made for early CPUs and unreadable MSR.
|
|
* NOTE: the calculated value may not be correct.
|
|
*/
|
|
return adjust_tjmax(c, id, dev);
|
|
}
|
|
|
|
static int __devinit create_name_attr(struct platform_data *pdata,
|
|
struct device *dev)
|
|
{
|
|
sysfs_attr_init(&pdata->name_attr.attr);
|
|
pdata->name_attr.attr.name = "name";
|
|
pdata->name_attr.attr.mode = S_IRUGO;
|
|
pdata->name_attr.show = show_name;
|
|
return device_create_file(dev, &pdata->name_attr);
|
|
}
|
|
|
|
static int __cpuinit create_core_attrs(struct temp_data *tdata,
|
|
struct device *dev, int attr_no)
|
|
{
|
|
int err, i;
|
|
static ssize_t (*const rd_ptr[TOTAL_ATTRS]) (struct device *dev,
|
|
struct device_attribute *devattr, char *buf) = {
|
|
show_label, show_crit_alarm, show_temp, show_tjmax,
|
|
show_ttarget };
|
|
static const char *const names[TOTAL_ATTRS] = {
|
|
"temp%d_label", "temp%d_crit_alarm",
|
|
"temp%d_input", "temp%d_crit",
|
|
"temp%d_max" };
|
|
|
|
for (i = 0; i < tdata->attr_size; i++) {
|
|
snprintf(tdata->attr_name[i], CORETEMP_NAME_LENGTH, names[i],
|
|
attr_no);
|
|
sysfs_attr_init(&tdata->sd_attrs[i].dev_attr.attr);
|
|
tdata->sd_attrs[i].dev_attr.attr.name = tdata->attr_name[i];
|
|
tdata->sd_attrs[i].dev_attr.attr.mode = S_IRUGO;
|
|
tdata->sd_attrs[i].dev_attr.show = rd_ptr[i];
|
|
tdata->sd_attrs[i].index = attr_no;
|
|
err = device_create_file(dev, &tdata->sd_attrs[i].dev_attr);
|
|
if (err)
|
|
goto exit_free;
|
|
}
|
|
return 0;
|
|
|
|
exit_free:
|
|
while (--i >= 0)
|
|
device_remove_file(dev, &tdata->sd_attrs[i].dev_attr);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int __cpuinit chk_ucode_version(unsigned int cpu)
|
|
{
|
|
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
|
|
|
/*
|
|
* Check if we have problem with errata AE18 of Core processors:
|
|
* Readings might stop update when processor visited too deep sleep,
|
|
* fixed for stepping D0 (6EC).
|
|
*/
|
|
if (c->x86_model == 0xe && c->x86_mask < 0xc && c->microcode < 0x39) {
|
|
pr_err("Errata AE18 not fixed, update BIOS or "
|
|
"microcode of the CPU!\n");
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device __cpuinit *coretemp_get_pdev(unsigned int cpu)
|
|
{
|
|
u16 phys_proc_id = TO_PHYS_ID(cpu);
|
|
struct pdev_entry *p;
|
|
|
|
mutex_lock(&pdev_list_mutex);
|
|
|
|
list_for_each_entry(p, &pdev_list, list)
|
|
if (p->phys_proc_id == phys_proc_id) {
|
|
mutex_unlock(&pdev_list_mutex);
|
|
return p->pdev;
|
|
}
|
|
|
|
mutex_unlock(&pdev_list_mutex);
|
|
return NULL;
|
|
}
|
|
|
|
static struct temp_data __cpuinit *init_temp_data(unsigned int cpu,
|
|
int pkg_flag)
|
|
{
|
|
struct temp_data *tdata;
|
|
|
|
tdata = kzalloc(sizeof(struct temp_data), GFP_KERNEL);
|
|
if (!tdata)
|
|
return NULL;
|
|
|
|
tdata->status_reg = pkg_flag ? MSR_IA32_PACKAGE_THERM_STATUS :
|
|
MSR_IA32_THERM_STATUS;
|
|
tdata->is_pkg_data = pkg_flag;
|
|
tdata->cpu = cpu;
|
|
tdata->cpu_core_id = TO_CORE_ID(cpu);
|
|
tdata->attr_size = MAX_CORE_ATTRS;
|
|
mutex_init(&tdata->update_lock);
|
|
return tdata;
|
|
}
|
|
|
|
static int __cpuinit create_core_data(struct platform_device *pdev,
|
|
unsigned int cpu, int pkg_flag)
|
|
{
|
|
struct temp_data *tdata;
|
|
struct platform_data *pdata = platform_get_drvdata(pdev);
|
|
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
|
u32 eax, edx;
|
|
int err, attr_no;
|
|
|
|
/*
|
|
* Find attr number for sysfs:
|
|
* We map the attr number to core id of the CPU
|
|
* The attr number is always core id + 2
|
|
* The Pkgtemp will always show up as temp1_*, if available
|
|
*/
|
|
attr_no = pkg_flag ? 1 : TO_ATTR_NO(cpu);
|
|
|
|
if (attr_no > MAX_CORE_DATA - 1)
|
|
return -ERANGE;
|
|
|
|
/*
|
|
* Provide a single set of attributes for all HT siblings of a core
|
|
* to avoid duplicate sensors (the processor ID and core ID of all
|
|
* HT siblings of a core are the same).
|
|
* Skip if a HT sibling of this core is already registered.
|
|
* This is not an error.
|
|
*/
|
|
if (pdata->core_data[attr_no] != NULL)
|
|
return 0;
|
|
|
|
tdata = init_temp_data(cpu, pkg_flag);
|
|
if (!tdata)
|
|
return -ENOMEM;
|
|
|
|
/* Test if we can access the status register */
|
|
err = rdmsr_safe_on_cpu(cpu, tdata->status_reg, &eax, &edx);
|
|
if (err)
|
|
goto exit_free;
|
|
|
|
/* We can access status register. Get Critical Temperature */
|
|
tdata->tjmax = get_tjmax(c, cpu, &pdev->dev);
|
|
|
|
/*
|
|
* Read the still undocumented bits 8:15 of IA32_TEMPERATURE_TARGET.
|
|
* The target temperature is available on older CPUs but not in this
|
|
* register. Atoms don't have the register at all.
|
|
*/
|
|
if (c->x86_model > 0xe && c->x86_model != 0x1c) {
|
|
err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET,
|
|
&eax, &edx);
|
|
if (!err) {
|
|
tdata->ttarget
|
|
= tdata->tjmax - ((eax >> 8) & 0xff) * 1000;
|
|
tdata->attr_size++;
|
|
}
|
|
}
|
|
|
|
pdata->core_data[attr_no] = tdata;
|
|
|
|
/* Create sysfs interfaces */
|
|
err = create_core_attrs(tdata, &pdev->dev, attr_no);
|
|
if (err)
|
|
goto exit_free;
|
|
|
|
return 0;
|
|
exit_free:
|
|
pdata->core_data[attr_no] = NULL;
|
|
kfree(tdata);
|
|
return err;
|
|
}
|
|
|
|
static void __cpuinit coretemp_add_core(unsigned int cpu, int pkg_flag)
|
|
{
|
|
struct platform_device *pdev = coretemp_get_pdev(cpu);
|
|
int err;
|
|
|
|
if (!pdev)
|
|
return;
|
|
|
|
err = create_core_data(pdev, cpu, pkg_flag);
|
|
if (err)
|
|
dev_err(&pdev->dev, "Adding Core %u failed\n", cpu);
|
|
}
|
|
|
|
static void coretemp_remove_core(struct platform_data *pdata,
|
|
struct device *dev, int indx)
|
|
{
|
|
int i;
|
|
struct temp_data *tdata = pdata->core_data[indx];
|
|
|
|
/* Remove the sysfs attributes */
|
|
for (i = 0; i < tdata->attr_size; i++)
|
|
device_remove_file(dev, &tdata->sd_attrs[i].dev_attr);
|
|
|
|
kfree(pdata->core_data[indx]);
|
|
pdata->core_data[indx] = NULL;
|
|
}
|
|
|
|
static int __devinit coretemp_probe(struct platform_device *pdev)
|
|
{
|
|
struct platform_data *pdata;
|
|
int err;
|
|
|
|
/* Initialize the per-package data structures */
|
|
pdata = kzalloc(sizeof(struct platform_data), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
err = create_name_attr(pdata, &pdev->dev);
|
|
if (err)
|
|
goto exit_free;
|
|
|
|
pdata->phys_proc_id = pdev->id;
|
|
platform_set_drvdata(pdev, pdata);
|
|
|
|
pdata->hwmon_dev = hwmon_device_register(&pdev->dev);
|
|
if (IS_ERR(pdata->hwmon_dev)) {
|
|
err = PTR_ERR(pdata->hwmon_dev);
|
|
dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
|
|
goto exit_name;
|
|
}
|
|
return 0;
|
|
|
|
exit_name:
|
|
device_remove_file(&pdev->dev, &pdata->name_attr);
|
|
platform_set_drvdata(pdev, NULL);
|
|
exit_free:
|
|
kfree(pdata);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit coretemp_remove(struct platform_device *pdev)
|
|
{
|
|
struct platform_data *pdata = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
for (i = MAX_CORE_DATA - 1; i >= 0; --i)
|
|
if (pdata->core_data[i])
|
|
coretemp_remove_core(pdata, &pdev->dev, i);
|
|
|
|
device_remove_file(&pdev->dev, &pdata->name_attr);
|
|
hwmon_device_unregister(pdata->hwmon_dev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(pdata);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver coretemp_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRVNAME,
|
|
},
|
|
.probe = coretemp_probe,
|
|
.remove = __devexit_p(coretemp_remove),
|
|
};
|
|
|
|
static int __cpuinit coretemp_device_add(unsigned int cpu)
|
|
{
|
|
int err;
|
|
struct platform_device *pdev;
|
|
struct pdev_entry *pdev_entry;
|
|
|
|
mutex_lock(&pdev_list_mutex);
|
|
|
|
pdev = platform_device_alloc(DRVNAME, TO_PHYS_ID(cpu));
|
|
if (!pdev) {
|
|
err = -ENOMEM;
|
|
pr_err("Device allocation failed\n");
|
|
goto exit;
|
|
}
|
|
|
|
pdev_entry = kzalloc(sizeof(struct pdev_entry), GFP_KERNEL);
|
|
if (!pdev_entry) {
|
|
err = -ENOMEM;
|
|
goto exit_device_put;
|
|
}
|
|
|
|
err = platform_device_add(pdev);
|
|
if (err) {
|
|
pr_err("Device addition failed (%d)\n", err);
|
|
goto exit_device_free;
|
|
}
|
|
|
|
pdev_entry->pdev = pdev;
|
|
pdev_entry->phys_proc_id = pdev->id;
|
|
|
|
list_add_tail(&pdev_entry->list, &pdev_list);
|
|
mutex_unlock(&pdev_list_mutex);
|
|
|
|
return 0;
|
|
|
|
exit_device_free:
|
|
kfree(pdev_entry);
|
|
exit_device_put:
|
|
platform_device_put(pdev);
|
|
exit:
|
|
mutex_unlock(&pdev_list_mutex);
|
|
return err;
|
|
}
|
|
|
|
static void __cpuinit coretemp_device_remove(unsigned int cpu)
|
|
{
|
|
struct pdev_entry *p, *n;
|
|
u16 phys_proc_id = TO_PHYS_ID(cpu);
|
|
|
|
mutex_lock(&pdev_list_mutex);
|
|
list_for_each_entry_safe(p, n, &pdev_list, list) {
|
|
if (p->phys_proc_id != phys_proc_id)
|
|
continue;
|
|
platform_device_unregister(p->pdev);
|
|
list_del(&p->list);
|
|
kfree(p);
|
|
}
|
|
mutex_unlock(&pdev_list_mutex);
|
|
}
|
|
|
|
static bool __cpuinit is_any_core_online(struct platform_data *pdata)
|
|
{
|
|
int i;
|
|
|
|
/* Find online cores, except pkgtemp data */
|
|
for (i = MAX_CORE_DATA - 1; i >= 0; --i) {
|
|
if (pdata->core_data[i] &&
|
|
!pdata->core_data[i]->is_pkg_data) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void __cpuinit get_core_online(unsigned int cpu)
|
|
{
|
|
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
|
struct platform_device *pdev = coretemp_get_pdev(cpu);
|
|
int err;
|
|
|
|
/*
|
|
* CPUID.06H.EAX[0] indicates whether the CPU has thermal
|
|
* sensors. We check this bit only, all the early CPUs
|
|
* without thermal sensors will be filtered out.
|
|
*/
|
|
if (!cpu_has(c, X86_FEATURE_DTS))
|
|
return;
|
|
|
|
if (!pdev) {
|
|
/* Check the microcode version of the CPU */
|
|
if (chk_ucode_version(cpu))
|
|
return;
|
|
|
|
/*
|
|
* Alright, we have DTS support.
|
|
* We are bringing the _first_ core in this pkg
|
|
* online. So, initialize per-pkg data structures and
|
|
* then bring this core online.
|
|
*/
|
|
err = coretemp_device_add(cpu);
|
|
if (err)
|
|
return;
|
|
/*
|
|
* Check whether pkgtemp support is available.
|
|
* If so, add interfaces for pkgtemp.
|
|
*/
|
|
if (cpu_has(c, X86_FEATURE_PTS))
|
|
coretemp_add_core(cpu, 1);
|
|
}
|
|
/*
|
|
* Physical CPU device already exists.
|
|
* So, just add interfaces for this core.
|
|
*/
|
|
coretemp_add_core(cpu, 0);
|
|
}
|
|
|
|
static void __cpuinit put_core_offline(unsigned int cpu)
|
|
{
|
|
int i, indx;
|
|
struct platform_data *pdata;
|
|
struct platform_device *pdev = coretemp_get_pdev(cpu);
|
|
|
|
/* If the physical CPU device does not exist, just return */
|
|
if (!pdev)
|
|
return;
|
|
|
|
pdata = platform_get_drvdata(pdev);
|
|
|
|
indx = TO_ATTR_NO(cpu);
|
|
|
|
if (pdata->core_data[indx] && pdata->core_data[indx]->cpu == cpu)
|
|
coretemp_remove_core(pdata, &pdev->dev, indx);
|
|
|
|
/*
|
|
* If a HT sibling of a core is taken offline, but another HT sibling
|
|
* of the same core is still online, register the alternate sibling.
|
|
* This ensures that exactly one set of attributes is provided as long
|
|
* as at least one HT sibling of a core is online.
|
|
*/
|
|
for_each_sibling(i, cpu) {
|
|
if (i != cpu) {
|
|
get_core_online(i);
|
|
/*
|
|
* Display temperature sensor data for one HT sibling
|
|
* per core only, so abort the loop after one such
|
|
* sibling has been found.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* If all cores in this pkg are offline, remove the device.
|
|
* coretemp_device_remove calls unregister_platform_device,
|
|
* which in turn calls coretemp_remove. This removes the
|
|
* pkgtemp entry and does other clean ups.
|
|
*/
|
|
if (!is_any_core_online(pdata))
|
|
coretemp_device_remove(cpu);
|
|
}
|
|
|
|
static int __cpuinit coretemp_cpu_callback(struct notifier_block *nfb,
|
|
unsigned long action, void *hcpu)
|
|
{
|
|
unsigned int cpu = (unsigned long) hcpu;
|
|
|
|
switch (action) {
|
|
case CPU_ONLINE:
|
|
case CPU_DOWN_FAILED:
|
|
get_core_online(cpu);
|
|
break;
|
|
case CPU_DOWN_PREPARE:
|
|
put_core_offline(cpu);
|
|
break;
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block coretemp_cpu_notifier __refdata = {
|
|
.notifier_call = coretemp_cpu_callback,
|
|
};
|
|
|
|
static const struct x86_cpu_id coretemp_ids[] = {
|
|
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTS },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(x86cpu, coretemp_ids);
|
|
|
|
static int __init coretemp_init(void)
|
|
{
|
|
int i, err = -ENODEV;
|
|
|
|
/*
|
|
* CPUID.06H.EAX[0] indicates whether the CPU has thermal
|
|
* sensors. We check this bit only, all the early CPUs
|
|
* without thermal sensors will be filtered out.
|
|
*/
|
|
if (!x86_match_cpu(coretemp_ids))
|
|
return -ENODEV;
|
|
|
|
err = platform_driver_register(&coretemp_driver);
|
|
if (err)
|
|
goto exit;
|
|
|
|
for_each_online_cpu(i)
|
|
get_core_online(i);
|
|
|
|
#ifndef CONFIG_HOTPLUG_CPU
|
|
if (list_empty(&pdev_list)) {
|
|
err = -ENODEV;
|
|
goto exit_driver_unreg;
|
|
}
|
|
#endif
|
|
|
|
register_hotcpu_notifier(&coretemp_cpu_notifier);
|
|
return 0;
|
|
|
|
#ifndef CONFIG_HOTPLUG_CPU
|
|
exit_driver_unreg:
|
|
platform_driver_unregister(&coretemp_driver);
|
|
#endif
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static void __exit coretemp_exit(void)
|
|
{
|
|
struct pdev_entry *p, *n;
|
|
|
|
unregister_hotcpu_notifier(&coretemp_cpu_notifier);
|
|
mutex_lock(&pdev_list_mutex);
|
|
list_for_each_entry_safe(p, n, &pdev_list, list) {
|
|
platform_device_unregister(p->pdev);
|
|
list_del(&p->list);
|
|
kfree(p);
|
|
}
|
|
mutex_unlock(&pdev_list_mutex);
|
|
platform_driver_unregister(&coretemp_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>");
|
|
MODULE_DESCRIPTION("Intel Core temperature monitor");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(coretemp_init)
|
|
module_exit(coretemp_exit)
|