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thermal: int340x: Handle workload hint interrupts

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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: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject adjustment, changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Srinivas Pandruvada 2023-08-28 17:23:45 -07:00 committed by Rafael J. Wysocki
parent 4b029a81c2
commit e682b86211
1 changed files with 33 additions and 8 deletions
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41
drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
View File

@ -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_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);
}
/* 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");