Hi, This is the second patch in the series. This patch adds support for coretemp to notify the threshold violations using netlink events. This patch has a dependency on the patch "Adding Notification support to the thermal framework" which can be downloaded from here: https://patchwork.kernel.org/patch/282042/ Kindly review and merge. ------------------------------------------------------ From: Durgadoss R <durgadoss.r@xxxxxxxxx> Date: Sat, 18 Dec 2010 07:23:21 +0530 Subject: [PATCH 2/2] Adding_Notification_Support_to_Coretemp Thos patch adds event notification support to coretemp. Whenever a threshold interrupt occurs, it is notified to the user space by a netlink event. Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx> --- drivers/hwmon/coretemp.c | 45 +++++++++++++++++++++++++++++++++++++++++++-- 1 files changed, 43 insertions(+), 2 deletions(-) diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 025902f..c28a61f 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -37,9 +37,16 @@ #include <asm/processor.h> #include <asm/smp.h> #include <asm/mce.h> +#include <linux/thermal.h> #define DRVNAME "coretemp" +/* An identification number to the DTS sensor. + * This will help the user space to figure out which + * sensor caused the event + */ +#define DTS_ID 0 + enum attributes { SHOW_TEMP, SHOW_TJMAX, CORE_TTARGET, CORE_TMIN, SHOW_LABEL, SHOW_NAME, SHOW_CRIT_ALARM, SHOW_MAX_ALARM } attrs; @@ -68,6 +75,22 @@ struct coretemp_data { static void update_alarm(struct coretemp_data *data); static int set_core_threshold(struct coretemp_data *data, int temp, int thres); +/* Interrupt Handlers for core/package thresholds */ +struct work_struct *t0_netlink_handlr; +struct work_struct *t1_netlink_handlr; + +/* Send netlink event for DTS sensor reaching threshold0 */ +static void gen_netlink_t0(struct work_struct *work) +{ + generate_netlink_event(DTS_ID, THERMAL_AUX0); +} + +/* Send netlink event for DTS sensor reaching threshold1 */ +static void gen_netlink_t1(struct work_struct *work) +{ + generate_netlink_event(DTS_ID, THERMAL_AUX1); +} + /* * Sysfs stuff */ @@ -368,15 +391,19 @@ static int coretemp_interrupt(__u64 msr_val) { if (msr_val & THERM_LOG_THRESHOLD0) { - if (!(msr_val & THERM_STATUS_THRESHOLD0)) + if (!(msr_val & THERM_STATUS_THRESHOLD0)) { pr_info("%s:Lower Threshold Reached\n", __func__); + schedule_work(t0_netlink_handlr); + } /* Reset the Threshold0 interrupt */ wrmsrl(MSR_IA32_THERM_STATUS, msr_val & ~THERM_LOG_THRESHOLD0); } if (msr_val & THERM_LOG_THRESHOLD1) { - if (msr_val & THERM_STATUS_THRESHOLD1) + if (msr_val & THERM_STATUS_THRESHOLD1) { pr_info("%s:Upper Threshold Reached\n", __func__); + schedule_work(t1_netlink_handlr); + } /* Reset the Threshold1 interrupt */ wrmsrl(MSR_IA32_THERM_STATUS, msr_val & ~THERM_LOG_THRESHOLD1); } @@ -743,6 +770,20 @@ static int __init coretemp_init(void) #endif register_hotcpu_notifier(&coretemp_cpu_notifier); + + /* Initialize the Interrupt Handlers */ + t0_netlink_handlr = kzalloc(sizeof(struct work_struct), GFP_KERNEL); + if (!t0_netlink_handlr) + return -ENOMEM; + + t1_netlink_handlr = kzalloc(sizeof(struct work_struct), GFP_KERNEL); + if (!t1_netlink_handlr) { + kfree(t0_netlink_handlr); + return -ENOMEM; + } + INIT_WORK(t0_netlink_handlr, (void *)gen_netlink_t0); + INIT_WORK(t1_netlink_handlr, (void *)gen_netlink_t1); + return 0; #ifndef CONFIG_HOTPLUG_CPU -- 1.6.5.2
Attachment:
0002-Adding_Notification_Support_to_Coretemp.patch
Description: 0002-Adding_Notification_Support_to_Coretemp.patch
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