Hi All,
Very sorry for the Wrong format of the Subject Line ..
Shall resubmit this now.
Regret the Spam..
Sorry,
Durga
> -----Original Message-----
> From: R, Durgadoss
> Sent: Friday, May 20, 2011 1:24 AM
> To: guenter.roeck@xxxxxxxxxxxx; lm-sensors@xxxxxxxxxxxxxx
> Cc: R, Durgadoss
> Subject: [PATCH] Subject: [PATCHv9 1/1] Hwmon: Merge Pkgtemp with Coretemp
>
> This patch merges the pkgtemp with coretemp driver.
> The sysfs interfaces for all cores in the same pkg
> are shown under one directory, in hwmon. It also
> supports CONFIG_HOTPLUG_CPU. So, the sysfs interfaces
> are created when each core comes online and are
> removed when it goes offline.
>
> Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx>
> ---
> v1:
> * Basic Merging of pkgtemp with coretemp.
> * Creates one hwmon device per core.
> v2:
> * Fixed some Data structure related comments from v1.
> * Creates one hwmon device per core.
> v3:
> * Creates one hwmon device per physical package.
> * No appropriate support for CPU hotplug.
> v4:
> * Creates one hwmon device per package.
> * Added appropriate support for CONFIG_HOTPLUG_CPU.
> v5:
> * Changed naming of sysfs based on core_id
> * Changed all %d to %u appropriately
> * Removed unnecessary variables crit/max_alarm
> * Fixed the flow of show_temp method
> * Removed unwanted print messages
> * Removed per-core related code from coretemp_device_add
> * Corrected the error handling in get_core_online
> v6:
> * Added support to bring a HT core online, when real core is offlined
> * Updated the Documentation/hwmon/coretemp
> * Rearranged the code to avoid forward declarations
> * Added locking for coretemp_remove_core method
> * Added appropriate CONFIG_SMP #ifdefs
> * Made variables static in create_core_attrs method
> v7:
> * Removed unnecessary mutexes from create_core_data and remove_core methods
> * Fixed data->valid conditions in show_temp method
> * Fixed coretemp_get_pdev for non-smp config
> v8:
> * Fixed retrieval of phys_proc_id in probe
> * Added coretemp_device_remove to handle CPU offlining properly
> v9:
> * Defined a global #ifdef CONFIG_SMP to find core_id, phys_id and attr_no
> * Hence cleaned multiple #ifdef CONFIG_SMP all over the code
> * Used list_for_each_safe in coretemp_device_remove method
> * Changed is_any_core_online method to return bool
> Documentation/hwmon/coretemp | 21 +-
> drivers/hwmon/coretemp.c | 660 +++++++++++++++++++++++++++++-------------
> 2 files changed, 467 insertions(+), 214 deletions(-)
>
> diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp
> index 25568f8..f85e913 100644
> --- a/Documentation/hwmon/coretemp
> +++ b/Documentation/hwmon/coretemp
> @@ -15,8 +15,13 @@ Author: Rudolf Marek
>
> Description
> -----------
> +This driver permits reading the DTS (Digital Temperature Sensor) embedded
> +inside Intel CPUs. This driver can read both the per-core and per-package
> +temperature using the appropriate sensors. The per-package sensor is new;
> +as of now, it is present only in the SandyBridge platform. The driver will
> +show the temperature of all cores inside a package under a single device
> +directory inside hwmon.
>
> -This driver permits reading temperature sensor embedded inside Intel Core CPU.
> Temperature is measured in degrees Celsius and measurement resolution is
> 1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
> the actual value of temperature register is in fact a delta from TjMax.
> @@ -27,13 +32,15 @@ mechanism will perform actions to forcibly cool down the
> processor. Alarm
> may be raised, if the temperature grows enough (more than TjMax) to trigger
> the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
>
> -temp1_input - Core temperature (in millidegrees Celsius).
> -temp1_max - All cooling devices should be turned on (on Core2).
> -temp1_crit - Maximum junction temperature (in millidegrees Celsius).
> -temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
> +All Sysfs entries are named with their core_id (represented here by 'X').
> +tempX_input - Core temperature (in millidegrees Celsius).
> +tempX_max - All cooling devices should be turned on (on Core2).
> +tempX_crit - Maximum junction temperature (in millidegrees Celsius).
> +tempX_crit_alarm - Set when Out-of-spec bit is set, never clears.
> Correct CPU operation is no longer guaranteed.
> -temp1_label - Contains string "Core X", where X is processor
> - number.
> +tempX_label - Contains string "Core X", where X is processor
> + number. For Package temp, this will be "Physical id Y",
> + where Y is the package number.
>
> The TjMax temperature is set to 85 degrees C if undocumented model specific
> register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
> diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
> index 194ca0a..07f7a1d 100644
> --- a/drivers/hwmon/coretemp.c
> +++ b/drivers/hwmon/coretemp.c
> @@ -41,119 +41,143 @@
>
> #define DRVNAME "coretemp"
>
> -typedef enum { SHOW_TEMP, SHOW_TJMAX, SHOW_TTARGET, SHOW_LABEL,
> - SHOW_NAME } SHOW;
> +#define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */
> +#define NUM_REAL_CORES 16 /* Number of Real cores per cpu */
> +#define CORETEMP_NAME_LENGTH 17 /* String Length of attrs */
> +#define MAX_ATTRS 5 /* Maximum no of per-core attrs */
> +#define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO)
> +
> +#ifdef CONFIG_SMP
> +#define TO_PHYS_ID(cpu) cpu_data(cpu).phys_proc_id
> +#define TO_CORE_ID(cpu) cpu_data(cpu).cpu_core_id
> +#define TO_ATTR_NO(cpu) (TO_CORE_ID(cpu) + BASE_SYSFS_ATTR_NO)
> +#else
> +#define TO_PHYS_ID(cpu) (cpu)
> +#define TO_CORE_ID(cpu) (cpu)
> +#define TO_ATTR_NO(cpu) (cpu)
> +#endif
>
> /*
> - * Functions declaration
> + * Per-Core Temperature Data
> + * @last_updated: The time when the current temperature value was updated
> + * earlier (in jiffies).
> + * @cpu_core_id: The CPU Core from which temperature values should be read
> + * This value is passed as "id" field to rdmsr/wrmsr functions.
> + * @status_reg: One of IA32_THERM_STATUS or IA32_PACKAGE_THERM_STATUS,
> + * from where the temperature values should be read.
> + * @is_pkg_data: If this is 1, the temp_data holds pkgtemp data.
> + * Otherwise, temp_data holds coretemp data.
> + * @valid: If this is 1, the current temperature is valid.
> */
> -
> -static struct coretemp_data *coretemp_update_device(struct device *dev);
> -
> -struct coretemp_data {
> - struct device *hwmon_dev;
> - struct mutex update_lock;
> - const char *name;
> - u32 id;
> - u16 core_id;
> - char valid; /* zero until following fields are valid */
> - unsigned long last_updated; /* in jiffies */
> +struct temp_data {
> int temp;
> - int tjmax;
> int ttarget;
> - u8 alarm;
> + int tjmax;
> + unsigned long last_updated;
> + unsigned int cpu;
> + u32 cpu_core_id;
> + u32 status_reg;
> + bool is_pkg_data;
> + bool valid;
> + struct sensor_device_attribute sd_attrs[MAX_ATTRS];
> + char attr_name[MAX_ATTRS][CORETEMP_NAME_LENGTH];
> + struct mutex update_lock;
> };
>
> -/*
> - * Sysfs stuff
> - */
> +/* Platform Data per Physical CPU */
> +struct platform_data {
> + struct device *hwmon_dev;
> + u16 phys_proc_id;
> + struct temp_data *core_data[MAX_CORE_DATA];
> + struct device_attribute name_attr;
> +};
>
> -static ssize_t show_name(struct device *dev, struct device_attribute
> - *devattr, char *buf)
> +struct pdev_entry {
> + struct list_head list;
> + struct platform_device *pdev;
> + unsigned int cpu;
> + u16 phys_proc_id;
> + u16 cpu_core_id;
> +};
> +
> +static LIST_HEAD(pdev_list);
> +static DEFINE_MUTEX(pdev_list_mutex);
> +
> +static ssize_t show_name(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> +{
> + return sprintf(buf, "%s\n", DRVNAME);
> +}
> +
> +static ssize_t show_label(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> {
> - int ret;
> struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> - struct coretemp_data *data = dev_get_drvdata(dev);
> + struct platform_data *pdata = dev_get_drvdata(dev);
> + struct temp_data *tdata = pdata->core_data[attr->index];
> +
> + if (tdata->is_pkg_data)
> + return sprintf(buf, "Physical id %u\n", pdata->phys_proc_id);
>
> - if (attr->index == SHOW_NAME)
> - ret = sprintf(buf, "%s\n", data->name);
> - else /* show label */
> - ret = sprintf(buf, "Core %d\n", data->core_id);
> - return ret;
> + return sprintf(buf, "Core %u\n", tdata->cpu_core_id);
> }
>
> -static ssize_t show_alarm(struct device *dev, struct device_attribute
> - *devattr, char *buf)
> +static ssize_t show_crit_alarm(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> {
> - struct coretemp_data *data = coretemp_update_device(dev);
> - /* read the Out-of-spec log, never clear */
> - return sprintf(buf, "%d\n", data->alarm);
> + u32 eax, edx;
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct platform_data *pdata = dev_get_drvdata(dev);
> + struct temp_data *tdata = pdata->core_data[attr->index];
> +
> + rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
> +
> + return sprintf(buf, "%d\n", (eax >> 5) & 1);
> }
>
> -static ssize_t show_temp(struct device *dev,
> - struct device_attribute *devattr, char *buf)
> +static ssize_t show_tjmax(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> {
> struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> - struct coretemp_data *data = coretemp_update_device(dev);
> - int err;
> + struct platform_data *pdata = dev_get_drvdata(dev);
>
> - if (attr->index == SHOW_TEMP)
> - err = data->valid ? sprintf(buf, "%d\n", data->temp) : -EAGAIN;
> - else if (attr->index == SHOW_TJMAX)
> - err = sprintf(buf, "%d\n", data->tjmax);
> - else
> - err = sprintf(buf, "%d\n", data->ttarget);
> - return err;
> + return sprintf(buf, "%d\n", pdata->core_data[attr->index]->tjmax);
> }
>
> -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL,
> - SHOW_TEMP);
> -static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp, NULL,
> - SHOW_TJMAX);
> -static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp, NULL,
> - SHOW_TTARGET);
> -static DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL);
> -static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_name, NULL, SHOW_LABEL);
> -static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, SHOW_NAME);
> -
> -static struct attribute *coretemp_attributes[] = {
> - &sensor_dev_attr_name.dev_attr.attr,
> - &sensor_dev_attr_temp1_label.dev_attr.attr,
> - &dev_attr_temp1_crit_alarm.attr,
> - &sensor_dev_attr_temp1_input.dev_attr.attr,
> - &sensor_dev_attr_temp1_crit.dev_attr.attr,
> - NULL
> -};
> +static ssize_t show_ttarget(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> +{
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct platform_data *pdata = dev_get_drvdata(dev);
>
> -static const struct attribute_group coretemp_group = {
> - .attrs = coretemp_attributes,
> -};
> + return sprintf(buf, "%d\n", pdata->core_data[attr->index]->ttarget);
> +}
>
> -static struct coretemp_data *coretemp_update_device(struct device *dev)
> +static ssize_t show_temp(struct device *dev,
> + struct device_attribute *devattr, char *buf)
> {
> - struct coretemp_data *data = dev_get_drvdata(dev);
> -
> - mutex_lock(&data->update_lock);
> + u32 eax, edx;
> + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
> + struct platform_data *pdata = dev_get_drvdata(dev);
> + struct temp_data *tdata = pdata->core_data[attr->index];
>
> - if (!data->valid || time_after(jiffies, data->last_updated + HZ)) {
> - u32 eax, edx;
> + mutex_lock(&tdata->update_lock);
>
> - data->valid = 0;
> - rdmsr_on_cpu(data->id, MSR_IA32_THERM_STATUS, &eax, &edx);
> - data->alarm = (eax >> 5) & 1;
> - /* update only if data has been valid */
> + /* Check whether the time interval has elapsed */
> + if (!tdata->valid || time_after(jiffies, tdata->last_updated + HZ)) {
> + rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
> + tdata->valid = 0;
> + /* Check whether the data is valid */
> if (eax & 0x80000000) {
> - data->temp = data->tjmax - (((eax >> 16)
> - & 0x7f) * 1000);
> - data->valid = 1;
> - } else {
> - dev_dbg(dev, "Temperature data invalid (0x%x)\n", eax);
> + tdata->temp = tdata->tjmax -
> + (((eax >> 16) & 0x7f) * 1000);
> + tdata->valid = 1;
> }
> - data->last_updated = jiffies;
> + tdata->last_updated = jiffies;
> }
>
> - mutex_unlock(&data->update_lock);
> - return data;
> + mutex_unlock(&tdata->update_lock);
> + return tdata->valid ? sprintf(buf, "%d\n", tdata->temp) : -EAGAIN;
> }
>
> static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device
> *dev)
> @@ -300,115 +324,293 @@ static void __devinit get_ucode_rev_on_cpu(void *edx)
> rdmsr(MSR_IA32_UCODE_REV, eax, *(u32 *)edx);
> }
>
> -static int __devinit coretemp_probe(struct platform_device *pdev)
> +static int get_pkg_tjmax(unsigned int cpu, struct device *dev)
> {
> - struct coretemp_data *data;
> - struct cpuinfo_x86 *c = &cpu_data(pdev->id);
> int err;
> - u32 eax, edx;
> + u32 eax, edx, val;
>
> - if (!(data = kzalloc(sizeof(struct coretemp_data), GFP_KERNEL))) {
> - err = -ENOMEM;
> - dev_err(&pdev->dev, "Out of memory\n");
> - goto exit;
> + err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
> + if (!err) {
> + val = (eax >> 16) & 0xff;
> + if ((val > 80) && (val < 120))
> + return val * 1000;
> }
> + dev_warn(dev, "Unable to read Pkg-TjMax from CPU:%u\n", cpu);
> + return 100000; /* Default TjMax: 100 degree celsius */
> +}
>
> - data->id = pdev->id;
> -#ifdef CONFIG_SMP
> - data->core_id = c->cpu_core_id;
> -#endif
> - data->name = "coretemp";
> - mutex_init(&data->update_lock);
> +static int create_name_attr(struct platform_data *pdata, struct device *dev)
> +{
> + 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);
> +}
>
> - /* test if we can access the THERM_STATUS MSR */
> - err = rdmsr_safe_on_cpu(data->id, MSR_IA32_THERM_STATUS, &eax, &edx);
> - if (err) {
> - dev_err(&pdev->dev,
> - "Unable to access THERM_STATUS MSR, giving up\n");
> - goto exit_free;
> +static int create_core_attrs(struct temp_data *tdata, struct device *dev,
> + int attr_no)
> +{
> + int err, i;
> + static ssize_t (*rd_ptr[MAX_ATTRS]) (struct device *dev,
> + struct device_attribute *devattr, char *buf) = {
> + show_label, show_crit_alarm, show_ttarget,
> + show_temp, show_tjmax };
> + static const char *names[MAX_ATTRS] = {
> + "temp%d_label", "temp%d_crit_alarm",
> + "temp%d_max", "temp%d_input",
> + "temp%d_crit" };
> +
> + for (i = 0; i < MAX_ATTRS; i++) {
> + snprintf(tdata->attr_name[i], CORETEMP_NAME_LENGTH, names[i],
> + attr_no);
> + 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].dev_attr.store = NULL;
> + 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 void update_ttarget(__u8 cpu_model, struct temp_data *tdata,
> + struct device *dev)
> +{
> + int err;
> + u32 eax, edx;
> +
> + /*
> + * Initialize ttarget value. Eventually this will be
> + * initialized with the value from MSR_IA32_THERM_INTERRUPT
> + * register. If IA32_TEMPERATURE_TARGET is supported, this
> + * value will be over written below.
> + * To Do: Patch to initialize ttarget from MSR_IA32_THERM_INTERRUPT
> + */
> + tdata->ttarget = tdata->tjmax - 20000;
>
> - /* 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).
> - */
> + /*
> + * Read the still undocumented IA32_TEMPERATURE_TARGET. It exists
> + * on older CPUs but not in this register,
> + * Atoms don't have it either.
> + */
> + if ((cpu_model > 0xe) && (cpu_model != 0x1c)) {
> + err = rdmsr_safe_on_cpu(tdata->cpu,
> + MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
> + if (err) {
> + dev_warn(dev,
> + "Unable to read IA32_TEMPERATURE_TARGET MSR\n");
> + } else {
> + tdata->ttarget = tdata->tjmax -
> + (((eax >> 8) & 0xff) * 1000);
> + }
> + }
> +}
> +
> +static int chk_ucode_version(struct platform_device *pdev)
> +{
> + struct cpuinfo_x86 *c = &cpu_data(pdev->id);
> + int err;
> + u32 edx;
>
> + /*
> + * 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)) {
> /* check for microcode update */
> - err = smp_call_function_single(data->id, get_ucode_rev_on_cpu,
> + err = smp_call_function_single(pdev->id, get_ucode_rev_on_cpu,
> &edx, 1);
> if (err) {
> dev_err(&pdev->dev,
> "Cannot determine microcode revision of "
> - "CPU#%u (%d)!\n", data->id, err);
> - err = -ENODEV;
> - goto exit_free;
> + "CPU#%u (%d)!\n", pdev->id, err);
> + return -ENODEV;
> } else if (edx < 0x39) {
> - err = -ENODEV;
> dev_err(&pdev->dev,
> "Errata AE18 not fixed, update BIOS or "
> "microcode of the CPU!\n");
> - goto exit_free;
> + return -ENODEV;
> }
> }
> + return 0;
> +}
> +
> +static struct platform_device *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 *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);
> + mutex_init(&tdata->update_lock);
> + return tdata;
> +}
>
> - data->tjmax = get_tjmax(c, data->id, &pdev->dev);
> - platform_set_drvdata(pdev, data);
> +static int create_core_data(struct platform_data *pdata,
> + struct platform_device *pdev,
> + unsigned int cpu, int pkg_flag)
> +{
> + struct temp_data *tdata;
> + struct cpuinfo_x86 *c = &cpu_data(cpu);
> + u32 eax, edx;
> + int err, attr_no;
>
> /*
> - * read the still undocumented IA32_TEMPERATURE_TARGET. It exists
> - * on older CPUs but not in this register,
> - * Atoms don't have it either.
> + * 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 ((c->x86_model > 0xe) && (c->x86_model != 0x1c)) {
> - err = rdmsr_safe_on_cpu(data->id, MSR_IA32_TEMPERATURE_TARGET,
> - &eax, &edx);
> - if (err) {
> - dev_warn(&pdev->dev, "Unable to read"
> - " IA32_TEMPERATURE_TARGET MSR\n");
> - } else {
> - data->ttarget = data->tjmax -
> - (((eax >> 8) & 0xff) * 1000);
> - err = device_create_file(&pdev->dev,
> - &sensor_dev_attr_temp1_max.dev_attr);
> - if (err)
> - goto exit_free;
> - }
> - }
> + if (attr_no > MAX_CORE_DATA - 1)
> + return -ERANGE;
> +
> + /* Skip if it is a HT core, Not an error */
> + if (pdata->core_data[attr_no] != NULL)
> + return 0;
>
> - if ((err = sysfs_create_group(&pdev->dev.kobj, &coretemp_group)))
> - goto exit_dev;
> + tdata = init_temp_data(cpu, pkg_flag);
> + if (!tdata)
> + return -ENOMEM;
>
> - data->hwmon_dev = hwmon_device_register(&pdev->dev);
> - if (IS_ERR(data->hwmon_dev)) {
> - err = PTR_ERR(data->hwmon_dev);
> - dev_err(&pdev->dev, "Class registration failed (%d)\n",
> - err);
> - goto exit_class;
> - }
> + /* 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 */
> + if (pkg_flag)
> + tdata->tjmax = get_pkg_tjmax(pdev->id, &pdev->dev);
> + else
> + tdata->tjmax = get_tjmax(c, cpu, &pdev->dev);
> +
> + update_ttarget(c->x86_model, tdata, &pdev->dev);
> + 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:
> + kfree(tdata);
> + return err;
> +}
> +
> +static void coretemp_add_core(unsigned int cpu, int pkg_flag)
> +{
> + struct platform_data *pdata;
> + struct platform_device *pdev = coretemp_get_pdev(cpu);
> + int err;
> +
> + if (!pdev)
> + return;
> +
> + pdata = platform_get_drvdata(pdev);
> +
> + err = create_core_data(pdata, 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 < MAX_ATTRS; 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;
>
> -exit_class:
> - sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
> -exit_dev:
> - device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
> + /* Check the microcode version of the CPU */
> + err = chk_ucode_version(pdev);
> + if (err)
> + return 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 = TO_PHYS_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(data);
> -exit:
> + kfree(pdata);
> return err;
> }
>
> static int __devexit coretemp_remove(struct platform_device *pdev)
> {
> - struct coretemp_data *data = platform_get_drvdata(pdev);
> + struct platform_data *pdata = platform_get_drvdata(pdev);
> + int i;
>
> - hwmon_device_unregister(data->hwmon_dev);
> - sysfs_remove_group(&pdev->dev.kobj, &coretemp_group);
> - device_remove_file(&pdev->dev, &sensor_dev_attr_temp1_max.dev_attr);
> + 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(data);
> + kfree(pdata);
> return 0;
> }
>
> @@ -421,50 +623,14 @@ static struct platform_driver coretemp_driver = {
> .remove = __devexit_p(coretemp_remove),
> };
>
> -struct pdev_entry {
> - struct list_head list;
> - struct platform_device *pdev;
> - unsigned int cpu;
> -#ifdef CONFIG_SMP
> - u16 phys_proc_id;
> - u16 cpu_core_id;
> -#endif
> -};
> -
> -static LIST_HEAD(pdev_list);
> -static DEFINE_MUTEX(pdev_list_mutex);
> -
> static int __cpuinit coretemp_device_add(unsigned int cpu)
> {
> int err;
> struct platform_device *pdev;
> struct pdev_entry *pdev_entry;
> - struct cpuinfo_x86 *c = &cpu_data(cpu);
> -
> - /*
> - * 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)) {
> - pr_info("CPU (model=0x%x) has no thermal sensor\n",
> - c->x86_model);
> - return 0;
> - }
>
> mutex_lock(&pdev_list_mutex);
>
> -#ifdef CONFIG_SMP
> - /* Skip second HT entry of each core */
> - list_for_each_entry(pdev_entry, &pdev_list, list) {
> - if (c->phys_proc_id == pdev_entry->phys_proc_id &&
> - c->cpu_core_id == pdev_entry->cpu_core_id) {
> - err = 0; /* Not an error */
> - goto exit;
> - }
> - }
> -#endif
> -
> pdev = platform_device_alloc(DRVNAME, cpu);
> if (!pdev) {
> err = -ENOMEM;
> @@ -486,10 +652,9 @@ static int __cpuinit coretemp_device_add(unsigned int cpu)
>
> pdev_entry->pdev = pdev;
> pdev_entry->cpu = cpu;
> -#ifdef CONFIG_SMP
> - pdev_entry->phys_proc_id = c->phys_proc_id;
> - pdev_entry->cpu_core_id = c->cpu_core_id;
> -#endif
> + pdev_entry->phys_proc_id = TO_PHYS_ID(cpu);
> + pdev_entry->cpu_core_id = TO_CORE_ID(cpu);
> +
> list_add_tail(&pdev_entry->list, &pdev_list);
> mutex_unlock(&pdev_list_mutex);
>
> @@ -504,28 +669,108 @@ exit:
> return err;
> }
>
> -static void __cpuinit coretemp_device_remove(unsigned int cpu)
> +static void coretemp_device_remove(unsigned int cpu)
> {
> - struct pdev_entry *p;
> - unsigned int i;
> + struct pdev_entry *p, *n;
> + u16 phys_proc_id = TO_PHYS_ID(cpu);
>
> mutex_lock(&pdev_list_mutex);
> - list_for_each_entry(p, &pdev_list, list) {
> - if (p->cpu != cpu)
> + 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);
> - mutex_unlock(&pdev_list_mutex);
> kfree(p);
> - for_each_cpu(i, cpu_sibling_mask(cpu))
> - if (i != cpu && !coretemp_device_add(i))
> - break;
> - return;
> }
> mutex_unlock(&pdev_list_mutex);
> }
>
> +static bool 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 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) {
> + /*
> + * 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 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);
> +
> + /* Online the HT version of this core, if any */
> + for_each_cpu(i, cpu_sibling_mask(cpu)) {
> + if (i != cpu) {
> + get_core_online(i);
> + 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)
> {
> @@ -534,10 +779,10 @@ static int __cpuinit coretemp_cpu_callback(struct
> notifier_block *nfb,
> switch (action) {
> case CPU_ONLINE:
> case CPU_DOWN_FAILED:
> - coretemp_device_add(cpu);
> + get_core_online(cpu);
> break;
> case CPU_DOWN_PREPARE:
> - coretemp_device_remove(cpu);
> + put_core_offline(cpu);
> break;
> }
> return NOTIFY_OK;
> @@ -547,6 +792,7 @@ static struct notifier_block coretemp_cpu_notifier
> __refdata = {
> .notifier_call = coretemp_cpu_callback,
> };
>
> +
> static int __init coretemp_init(void)
> {
> int i, err = -ENODEV;
> @@ -560,7 +806,7 @@ static int __init coretemp_init(void)
> goto exit;
>
> for_each_online_cpu(i)
> - coretemp_device_add(i);
> + get_core_online(i);
>
> #ifndef CONFIG_HOTPLUG_CPU
> if (list_empty(&pdev_list)) {
> --
> 1.6.1
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