Removes the limits of supported CPU cores and max core ID.
Patch is based on Kirill A. Shutemov's work from 2012.
Signed-off-by: Lukasz Odzioba <lukasz.odzioba@xxxxxxxxx>
---
drivers/hwmon/coretemp.c | 120 ++++++++++++++++++++++++++++-----------------
1 files changed, 75 insertions(+), 45 deletions(-)
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 3e03379..c39ce14 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -52,11 +52,10 @@ module_param_named(tjmax, force_tjmax, int, 0444);
MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius");
#define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */
-#define NUM_REAL_CORES 32 /* Number of Real cores per cpu */
#define CORETEMP_NAME_LENGTH 19 /* String Length of attrs */
#define MAX_CORE_ATTRS 4 /* Maximum no of basic attrs */
#define TOTAL_ATTRS (MAX_CORE_ATTRS + 1)
-#define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO)
+#define PACKAGE_ID 1 /* Magic number of physical cpu */
#define TO_PHYS_ID(cpu) (cpu_data(cpu).phys_proc_id)
#define TO_CORE_ID(cpu) (cpu_data(cpu).cpu_core_id)
@@ -71,18 +70,20 @@ MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius");
/*
* Per-Core Temperature Data
+ * @id: If this is equal PACKAGE_ID, structure contains package temperature
+ data, otherwise it is just TO_ATTR_NO(cpu)
* @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.
- * @attr_size: Total number of pre-core attrs displayed in the sysfs.
- * @is_pkg_data: If this is 1, the temp_data holds pkgtemp data.
- * Otherwise, temp_data holds coretemp data.
+ * @attr_size: Total number of per-core attrs displayed in the sysfs.
* @valid: If this is 1, the current temperature is valid.
*/
struct temp_data {
+ struct list_head list;
+ int id;
int temp;
int ttarget;
int tjmax;
@@ -104,7 +105,8 @@ struct temp_data {
struct platform_data {
struct device *hwmon_dev;
u16 phys_proc_id;
- struct temp_data *core_data[MAX_CORE_DATA];
+ struct list_head temp_data_list;
+ struct mutex temp_data_lock;
struct device_attribute name_attr;
};
@@ -117,12 +119,26 @@ struct pdev_entry {
static LIST_HEAD(pdev_list);
static DEFINE_MUTEX(pdev_list_mutex);
+static struct temp_data *get_temp_data(struct platform_data *pdata, int id)
+{
+ struct temp_data *tdata;
+
+ mutex_lock(&pdata->temp_data_lock);
+ list_for_each_entry(tdata, &pdata->temp_data_list, list)
+ if (tdata->id == id) {
+ mutex_unlock(&pdata->temp_data_lock);
+ return tdata;
+ }
+ mutex_unlock(&pdata->temp_data_lock);
+ return NULL;
+}
+
static ssize_t show_label(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);
- struct temp_data *tdata = pdata->core_data[attr->index];
+ struct temp_data *tdata = get_temp_data(pdata, attr->index);
if (tdata->is_pkg_data)
return sprintf(buf, "Physical id %u\n", pdata->phys_proc_id);
@@ -136,7 +152,7 @@ static ssize_t show_crit_alarm(struct device *dev,
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];
+ struct temp_data *tdata = get_temp_data(pdata, attr->index);
rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
@@ -148,8 +164,9 @@ static ssize_t show_tjmax(struct device *dev,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct platform_data *pdata = dev_get_drvdata(dev);
+ struct temp_data *tdata = get_temp_data(pdata, attr->index);
- return sprintf(buf, "%d\n", pdata->core_data[attr->index]->tjmax);
+ return sprintf(buf, "%d\n", tdata->tjmax);
}
static ssize_t show_ttarget(struct device *dev,
@@ -157,8 +174,9 @@ static ssize_t show_ttarget(struct device *dev,
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct platform_data *pdata = dev_get_drvdata(dev);
+ struct temp_data *tdata = get_temp_data(pdata, attr->index);
- return sprintf(buf, "%d\n", pdata->core_data[attr->index]->ttarget);
+ return sprintf(buf, "%d\n", tdata->ttarget);
}
static ssize_t show_temp(struct device *dev,
@@ -167,7 +185,7 @@ static ssize_t show_temp(struct device *dev,
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];
+ struct temp_data *tdata = get_temp_data(pdata, attr->index);
mutex_lock(&tdata->update_lock);
@@ -468,7 +486,7 @@ static struct temp_data *init_temp_data(unsigned int cpu, int pkg_flag)
return tdata;
}
-static int create_core_data(struct platform_device *pdev, unsigned int cpu,
+static int create_temp_data(struct platform_device *pdev, unsigned int cpu,
int pkg_flag)
{
struct temp_data *tdata;
@@ -483,10 +501,7 @@ static int create_core_data(struct platform_device *pdev, unsigned int 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;
+ attr_no = pkg_flag ? PACKAGE_ID : TO_ATTR_NO(cpu);
/*
* Provide a single set of attributes for all HT siblings of a core
@@ -495,7 +510,8 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu,
* Skip if a HT sibling of this core is already registered.
* This is not an error.
*/
- if (pdata->core_data[attr_no] != NULL)
+ tdata = get_temp_data(pdata, attr_no);
+ if (tdata)
return 0;
tdata = init_temp_data(cpu, pkg_flag);
@@ -525,16 +541,28 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu,
}
}
- pdata->core_data[attr_no] = tdata;
+ tdata->id = attr_no;
+
+ get_online_cpus();
+ mutex_lock(&pdata->temp_data_lock);
+ list_add(&tdata->list, &pdata->temp_data_list);
+ mutex_unlock(&pdata->temp_data_lock);
+ put_online_cpus();
/* Create sysfs interfaces */
err = create_core_attrs(tdata, pdata->hwmon_dev, attr_no);
if (err)
- goto exit_free;
+ goto exit_del;
return 0;
+
+exit_del:
+ get_online_cpus();
+ mutex_lock(&pdata->temp_data_lock);
+ list_del(&tdata->list);
+ mutex_unlock(&pdata->temp_data_lock);
+ put_online_cpus();
exit_free:
- pdata->core_data[attr_no] = NULL;
kfree(tdata);
return err;
}
@@ -547,21 +575,21 @@ static void coretemp_add_core(unsigned int cpu, int pkg_flag)
if (!pdev)
return;
- err = create_core_data(pdev, cpu, pkg_flag);
+ err = create_temp_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,
- int indx)
+ struct temp_data *tdata)
{
- struct temp_data *tdata = pdata->core_data[indx];
-
/* Remove the sysfs attributes */
sysfs_remove_group(&pdata->hwmon_dev->kobj, &tdata->attr_group);
- kfree(pdata->core_data[indx]);
- pdata->core_data[indx] = NULL;
+ mutex_lock(&pdata->temp_data_lock);
+ list_del(&tdata->list);
+ kfree(tdata);
+ mutex_unlock(&pdata->temp_data_lock);
}
static int coretemp_probe(struct platform_device *pdev)
@@ -575,6 +603,8 @@ static int coretemp_probe(struct platform_device *pdev)
return -ENOMEM;
pdata->phys_proc_id = pdev->id;
+ INIT_LIST_HEAD(&pdata->temp_data_list);
+ mutex_init(&pdata->temp_data_lock);
platform_set_drvdata(pdev, pdata);
pdata->hwmon_dev = devm_hwmon_device_register_with_groups(dev, DRVNAME,
@@ -585,11 +615,12 @@ static int coretemp_probe(struct platform_device *pdev)
static int coretemp_remove(struct platform_device *pdev)
{
struct platform_data *pdata = platform_get_drvdata(pdev);
- int i;
+ struct temp_data *cur, *tmp;
- for (i = MAX_CORE_DATA - 1; i >= 0; --i)
- if (pdata->core_data[i])
- coretemp_remove_core(pdata, i);
+ get_online_cpus();
+ list_for_each_entry_safe(cur, tmp, &pdata->temp_data_list, list)
+ coretemp_remove_core(pdata, cur);
+ put_online_cpus();
return 0;
}
@@ -664,15 +695,15 @@ static void coretemp_device_remove(unsigned int cpu)
static bool is_any_core_online(struct platform_data *pdata)
{
- int i;
+ struct temp_data *tdata;
- /* 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) {
+ mutex_lock(&pdata->temp_data_lock);
+ list_for_each_entry(tdata, &pdata->temp_data_list, list)
+ if (tdata->id != PACKAGE_ID) {
+ mutex_unlock(&pdata->temp_data_lock);
return true;
}
- }
+ mutex_unlock(&pdata->temp_data_lock);
return false;
}
@@ -720,9 +751,10 @@ static void get_core_online(unsigned int cpu)
static void put_core_offline(unsigned int cpu)
{
- int i, indx;
+ int i, attr_no;
struct platform_data *pdata;
struct platform_device *pdev = coretemp_get_pdev(cpu);
+ struct temp_data *tdata;
/* If the physical CPU device does not exist, just return */
if (!pdev)
@@ -730,15 +762,13 @@ static void put_core_offline(unsigned int cpu)
pdata = platform_get_drvdata(pdev);
- indx = TO_ATTR_NO(cpu);
-
- /* The core id is too big, just return */
- if (indx > MAX_CORE_DATA - 1)
- return;
-
- if (pdata->core_data[indx] && pdata->core_data[indx]->cpu == cpu)
- coretemp_remove_core(pdata, indx);
+ attr_no = TO_ATTR_NO(cpu);
+ get_online_cpus();
+ tdata = get_temp_data(pdata, attr_no);
+ if (tdata && tdata->cpu == cpu)
+ coretemp_remove_core(pdata, tdata);
+ put_online_cpus();
/*
* 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.
--
1.7.1
--------------------------------------------------------------------
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