diff mbox series

[2/3] thermal/drivers/intel: Use generic trip points for processor_thermal_device_pci

Message ID 20230118181622.33335-2-daniel.lezcano@linaro.org
State New
Headers
Series [1/3] thermal/drivers/intel: Use generic trip points for quark_dts |

Commit Message

Daniel Lezcano Jan. 18, 2023, 6:16 p.m. UTC 
  The thermal framework gives the possibility to register the trip
points with the thermal zone. When that is done, no get_trip_* ops are
needed and they can be removed.

Convert ops content logic into generic trip points and register them with the
thermal zone.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../processor_thermal_device_pci.c            | 53 ++++++++-----------
 1 file changed, 22 insertions(+), 31 deletions(-)

Comments

srinivas pandruvada Jan. 18, 2023, 7:09 p.m. UTC | #1 
On Wed, 2023-01-18 at 19:16 +0100, Daniel Lezcano wrote:
> The thermal framework gives the possibility to register the trip
> points with the thermal zone. When that is done, no get_trip_* ops
> are
> needed and they can be removed.
> 
> Convert ops content logic into generic trip points and register them
> with the
> thermal zone.
> 
In this scheme is the assumption is that trip point temperature never
changes? If firmware updated the trip temperature, what needs to be
done?

Thanks,
Srinivas


> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
>  .../processor_thermal_device_pci.c            | 53 ++++++++---------
> --
>  1 file changed, 22 insertions(+), 31 deletions(-)
> 
> diff --git
> a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.
> c
> b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.
> c
> index bf1b1cdfade4..c7d50862bf56 100644
> ---
> a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.
> c
> +++
> b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.
> c
> @@ -144,34 +144,6 @@ static int sys_get_curr_temp(struct
> thermal_zone_device *tzd, int *temp)
>         return 0;
>  }
>  
> -static int sys_get_trip_temp(struct thermal_zone_device *tzd,
> -                            int trip, int *temp)
> -{
> -       struct proc_thermal_pci *pci_info = tzd->devdata;
> -       u32 _temp;
> -
> -       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0,
> &_temp);
> -       if (!_temp) {
> -               *temp = THERMAL_TEMP_INVALID;
> -       } else {
> -               int tjmax;
> -
> -               proc_thermal_mmio_read(pci_info,
> PROC_THERMAL_MMIO_TJMAX, &tjmax);
> -               _temp = tjmax - _temp;
> -               *temp = (unsigned long)_temp * 1000;
> -       }
> -
> -       return 0;
> -}
> -
> -static int sys_get_trip_type(struct thermal_zone_device *tzd, int
> trip,
> -                             enum thermal_trip_type *type)
> -{
> -       *type = THERMAL_TRIP_PASSIVE;
> -
> -       return 0;
> -}
> -
>  static int sys_set_trip_temp(struct thermal_zone_device *tzd, int
> trip, int temp)
>  {
>         struct proc_thermal_pci *pci_info = tzd->devdata;
> @@ -200,10 +172,26 @@ static int sys_set_trip_temp(struct
> thermal_zone_device *tzd, int trip, int temp
>         return 0;
>  }
>  
> +static int get_trip_temp(struct proc_thermal_pci *pci_info)
> +{
> +       int temp, tjmax;
> +
> +       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0,
> &temp);
> +       if (!temp)
> +               return THERMAL_TEMP_INVALID;
> +
> +       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX,
> &tjmax);
> +       temp = (tjmax - temp) * 1000;
> +
> +       return temp;
> +}
> +
> +static struct thermal_trip psv_trip = {
> +       .type = THERMAL_TRIP_PASSIVE,
> +};
> +
>  static struct thermal_zone_device_ops tzone_ops = {
>         .get_temp = sys_get_curr_temp,
> -       .get_trip_temp = sys_get_trip_temp,
> -       .get_trip_type = sys_get_trip_type,
>         .set_trip_temp  = sys_set_trip_temp,
>  };
>  
> @@ -251,7 +239,10 @@ static int proc_thermal_pci_probe(struct pci_dev
> *pdev, const struct pci_device_
>         if (ret)
>                 goto err_ret_thermal;
>  
> -       pci_info->tzone = thermal_zone_device_register("TCPU_PCI", 1,
> 1, pci_info,
> +       psv_trip.temperature = get_trip_temp(pci_info);
> +       
> +       pci_info->tzone =
> thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
> +                                                       1, 1,
> pci_info,
>                                                         &tzone_ops,
>                                                         &tzone_params
> , 0, 0);
>         if (IS_ERR(pci_info->tzone)) {
Daniel Lezcano Jan. 23, 2023, 6:02 p.m. UTC | #2 
Hi Srinivas,


On 18/01/2023 20:09, srinivas pandruvada wrote:
> On Wed, 2023-01-18 at 19:16 +0100, Daniel Lezcano wrote:
>> The thermal framework gives the possibility to register the trip
>> points with the thermal zone. When that is done, no get_trip_* ops
>> are
>> needed and they can be removed.
>>
>> Convert ops content logic into generic trip points and register them
>> with the
>> thermal zone.
>>
> In this scheme is the assumption is that trip point temperature never
> changes? If firmware updated the trip temperature, what needs to be
> done?

I'm a bit confused about the situation where the firmware can change the 
trip point in the back of the OSPM.

Does the firmware send a notification about the trip change? Or does it 
assume the OSPM will be reading the trip point while monitoring/polling 
the thermal zone ?

Is the question for this particular driver?

If the trip point is changed by the userspace (via sysfs), 
thermal_zone_set_trip() is used which in turn changes the thermal trip 
temperature directly in the generic structure and then calls the back 
set_trip_temp.
srinivas pandruvada Jan. 23, 2023, 7:31 p.m. UTC | #3 
Hi Daniel,

On Mon, 2023-01-23 at 19:02 +0100, Daniel Lezcano wrote:
> 
> Hi Srinivas,
> 
> 
> On 18/01/2023 20:09, srinivas pandruvada wrote:
> > On Wed, 2023-01-18 at 19:16 +0100, Daniel Lezcano wrote:
> > > The thermal framework gives the possibility to register the trip
> > > points with the thermal zone. When that is done, no get_trip_*
> > > ops
> > > are
> > > needed and they can be removed.
> > > 
> > > Convert ops content logic into generic trip points and register
> > > them
> > > with the
> > > thermal zone.
> > > 
> > In this scheme is the assumption is that trip point temperature
> > never
> > changes? If firmware updated the trip temperature, what needs to be
> > done?
> 
> I'm a bit confused about the situation where the firmware can change
> the 
> trip point in the back of the OSPM.
> 
> Does the firmware send a notification about the trip change? Or does
> it 
> assume the OSPM will be reading the trip point while
> monitoring/polling 
> the thermal zone ?
Firmware sends an ACPI notification. For example INT3403.

https://elixir.bootlin.com/linux/latest/C/ident/INT3403_PERF_TRIP_POINT_CHANGED


> 
> Is the question for this particular driver?
This PCH driver trips are not changed by firmware hence we don't have
to worry about here.

Thanks,
Srinivas

> 
> If the trip point is changed by the userspace (via sysfs), 
> thermal_zone_set_trip() is used which in turn changes the thermal
> trip 
> temperature directly in the generic structure and then calls the back
> set_trip_temp.
>
Rafael J. Wysocki Jan. 26, 2023, 3:18 p.m. UTC | #4 
On Wed, Jan 18, 2023 at 7:16 PM Daniel Lezcano
<daniel.lezcano@linaro.org> wrote:
>
> The thermal framework gives the possibility to register the trip
> points with the thermal zone. When that is done, no get_trip_* ops are
> needed and they can be removed.
>
> Convert ops content logic into generic trip points and register them with the
> thermal zone.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
> ---
>  .../processor_thermal_device_pci.c            | 53 ++++++++-----------
>  1 file changed, 22 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
> index bf1b1cdfade4..c7d50862bf56 100644
> --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
> +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
> @@ -144,34 +144,6 @@ static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
>         return 0;
>  }
>
> -static int sys_get_trip_temp(struct thermal_zone_device *tzd,
> -                            int trip, int *temp)
> -{
> -       struct proc_thermal_pci *pci_info = tzd->devdata;
> -       u32 _temp;
> -
> -       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &_temp);
> -       if (!_temp) {
> -               *temp = THERMAL_TEMP_INVALID;
> -       } else {
> -               int tjmax;
> -
> -               proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
> -               _temp = tjmax - _temp;
> -               *temp = (unsigned long)_temp * 1000;
> -       }
> -
> -       return 0;
> -}
> -
> -static int sys_get_trip_type(struct thermal_zone_device *tzd, int trip,
> -                             enum thermal_trip_type *type)
> -{
> -       *type = THERMAL_TRIP_PASSIVE;
> -
> -       return 0;
> -}
> -
>  static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
>  {
>         struct proc_thermal_pci *pci_info = tzd->devdata;
> @@ -200,10 +172,26 @@ static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp
>         return 0;
>  }
>
> +static int get_trip_temp(struct proc_thermal_pci *pci_info)
> +{
> +       int temp, tjmax;
> +
> +       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &temp);
> +       if (!temp)
> +               return THERMAL_TEMP_INVALID;
> +
> +       proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
> +       temp = (tjmax - temp) * 1000;
> +
> +       return temp;
> +}
> +
> +static struct thermal_trip psv_trip = {
> +       .type = THERMAL_TRIP_PASSIVE,
> +};
> +
>  static struct thermal_zone_device_ops tzone_ops = {
>         .get_temp = sys_get_curr_temp,
> -       .get_trip_temp = sys_get_trip_temp,
> -       .get_trip_type = sys_get_trip_type,
>         .set_trip_temp  = sys_set_trip_temp,
>  };
>
> @@ -251,7 +239,10 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
>         if (ret)
>                 goto err_ret_thermal;
>
> -       pci_info->tzone = thermal_zone_device_register("TCPU_PCI", 1, 1, pci_info,
> +       psv_trip.temperature = get_trip_temp(pci_info);
> +
> +       pci_info->tzone = thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
> +                                                       1, 1, pci_info,
>                                                         &tzone_ops,
>                                                         &tzone_params, 0, 0);
>         if (IS_ERR(pci_info->tzone)) {
> --

Applied as 6.3 material with edits in the subject and changelog, thanks!
diff mbox series

Patch

diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
index bf1b1cdfade4..c7d50862bf56 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -144,34 +144,6 @@  static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
 	return 0;
 }
 
-static int sys_get_trip_temp(struct thermal_zone_device *tzd,
-			     int trip, int *temp)
-{
-	struct proc_thermal_pci *pci_info = tzd->devdata;
-	u32 _temp;
-
-	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &_temp);
-	if (!_temp) {
-		*temp = THERMAL_TEMP_INVALID;
-	} else {
-		int tjmax;
-
-		proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
-		_temp = tjmax - _temp;
-		*temp = (unsigned long)_temp * 1000;
-	}
-
-	return 0;
-}
-
-static int sys_get_trip_type(struct thermal_zone_device *tzd, int trip,
-			      enum thermal_trip_type *type)
-{
-	*type = THERMAL_TRIP_PASSIVE;
-
-	return 0;
-}
-
 static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
 {
 	struct proc_thermal_pci *pci_info = tzd->devdata;
@@ -200,10 +172,26 @@  static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp
 	return 0;
 }
 
+static int get_trip_temp(struct proc_thermal_pci *pci_info)
+{
+	int temp, tjmax;
+
+	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_THRES_0, &temp);
+	if (!temp)
+		return THERMAL_TEMP_INVALID;
+
+	proc_thermal_mmio_read(pci_info, PROC_THERMAL_MMIO_TJMAX, &tjmax);
+	temp = (tjmax - temp) * 1000;
+
+	return temp;
+}
+
+static struct thermal_trip psv_trip = {
+	.type = THERMAL_TRIP_PASSIVE,
+};
+
 static struct thermal_zone_device_ops tzone_ops = {
 	.get_temp = sys_get_curr_temp,
-	.get_trip_temp = sys_get_trip_temp,
-	.get_trip_type = sys_get_trip_type,
 	.set_trip_temp	= sys_set_trip_temp,
 };
 
@@ -251,7 +239,10 @@  static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	if (ret)
 		goto err_ret_thermal;
 
-	pci_info->tzone = thermal_zone_device_register("TCPU_PCI", 1, 1, pci_info,
+	psv_trip.temperature = get_trip_temp(pci_info);
+	
+	pci_info->tzone = thermal_zone_device_register_with_trips("TCPU_PCI", &psv_trip,
+							1, 1, pci_info,
 							&tzone_ops,
 							&tzone_params, 0, 0);
 	if (IS_ERR(pci_info->tzone)) {