Commit e682b862 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Rafael J. Wysocki
Browse files

thermal: int340x: Handle workload hint interrupts 



On thermal device interrupt, if the interrupt is generated for passing
workload hint, call the callback to pass notification to the user
space.

First call proc_thermal_check_wt_intr() to check interrupt, if this
callback returns true, wake the IRQ thread to call
proc_thermal_wt_intr_callback() to notify user space.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject adjustment, changelog edits ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 4b029a81

drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c

+32 −7
Original line number Diff line number Diff line
@@ -122,20 +122,43 @@ static void pkg_thermal_schedule_work(struct delayed_work *work) 
	schedule_delayed_work(work, ms);

}



static irqreturn_t proc_thermal_irq_thread_handler(int irq, void *devid)

{

	struct proc_thermal_pci *pci_info = devid;



	proc_thermal_wt_intr_callback(pci_info->pdev, pci_info->proc_priv);



	return IRQ_HANDLED;

}



static irqreturn_t proc_thermal_irq_handler(int irq, void *devid)

{

	struct proc_thermal_pci *pci_info = devid;

	struct proc_thermal_device *proc_priv;

	int ret = IRQ_HANDLED;

	u32 status;



	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_INT_STATUS_0, &status);

	proc_priv = pci_info->proc_priv;



	if (proc_priv->mmio_feature_mask & PROC_THERMAL_FEATURE_WT_HINT) {

		if (proc_thermal_check_wt_intr(pci_info->proc_priv))

			ret = IRQ_WAKE_THREAD;

	}



	/*

	 * Since now there are two sources of interrupts: one from thermal threshold

	 * and another from workload hint, add a check if there was really a threshold

	 * interrupt before scheduling work function for thermal threshold.

	 */

	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_INT_STATUS_0, &status);

	if (status) {

		/* Disable enable interrupt flag */

		proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 0);

		pci_write_config_byte(pci_info->pdev, 0xdc, 0x01);



		pkg_thermal_schedule_work(&pci_info->work);

	}



	return IRQ_HANDLED;

	return ret;

}



static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
@@ -270,7 +293,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_ 
	}



	ret = devm_request_threaded_irq(&pdev->dev, irq,

					proc_thermal_irq_handler, NULL,

					proc_thermal_irq_handler, proc_thermal_irq_thread_handler,

					irq_flag, KBUILD_MODNAME, pci_info);

	if (ret) {

		dev_err(&pdev->dev, "Request IRQ %d failed\n", pdev->irq);
@@ -384,6 +407,8 @@ static struct pci_driver proc_thermal_pci_driver = { 


module_pci_driver(proc_thermal_pci_driver);



MODULE_IMPORT_NS(INT340X_THERMAL);



MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");

MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");

MODULE_LICENSE("GPL v2");