| Message ID | 5779195.DvuYhMxLoT@kreacher |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Thu, Feb 22, 2024 at 8:48 PM Rafael J. Wysocki <rjw@rjwysocki.net> wrote: > > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com> > > In order to allow thermal zone creators to specify the writability of > trip point temperature and hysteresis on a per-trip basis, add a flags > field to struct thermal_trip and define flags to represent the desired > trip properties. > > Also make thermal_zone_device_register_with_trips() set the > THERMAL_TRIP_FLAG_RW_TEMP flag for all trips covered by the writable > trips mask passed to it and modify the thermal sysfs code to look at > the trip flags instead of using the writable trips mask directly or > checking the presence of the .set_trip_hyst() zone callback. > > Additionally, make trip_point_temp_store() and trip_point_hyst_store() > fail with an error code if the trip passed to one of them has > THERMAL_TRIP_FLAG_RW_TEMP or THERMAL_TRIP_FLAG_RW_HYST, > respectively, clear in its flags. > > No intentional functional impact. > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> AFAICS this patch addresses all of the review comments and because the rest of the series (depending on it) has been approved, I'm applying the whole series including this patch. > --- > > v2 -> v2.1: > * Don't add redundant checks in 3 places (Daniel). > * Define THERMAL_TRIP_FLAG_RW as the combination of the _RW_ trip flags (Daniel). > > v1 -> v2: > * Rename trip flags (Stanislaw). > > --- > drivers/thermal/thermal_core.c | 9 ++++++++- > drivers/thermal/thermal_core.h | 2 +- > drivers/thermal/thermal_sysfs.c | 18 +++++++++--------- > include/linux/thermal.h | 8 ++++++++ > 4 files changed, 26 insertions(+), 11 deletions(-) > > Index: linux-pm/include/linux/thermal.h > =================================================================== > --- linux-pm.orig/include/linux/thermal.h > +++ linux-pm/include/linux/thermal.h > @@ -64,15 +64,23 @@ enum thermal_notify_event { > * @threshold: trip crossing notification threshold miliCelsius > * @type: trip point type > * @priv: pointer to driver data associated with this trip > + * @flags: flags representing binary properties of the trip > */ > struct thermal_trip { > int temperature; > int hysteresis; > int threshold; > enum thermal_trip_type type; > + u8 flags; > void *priv; > }; > > +#define THERMAL_TRIP_FLAG_RW_TEMP BIT(0) > +#define THERMAL_TRIP_FLAG_RW_HYST BIT(1) > + > +#define THERMAL_TRIP_FLAG_RW (THERMAL_TRIP_FLAG_RW_TEMP | \ > + THERMAL_TRIP_FLAG_RW_HYST) > + > struct thermal_zone_device_ops { > int (*bind) (struct thermal_zone_device *, > struct thermal_cooling_device *); > Index: linux-pm/drivers/thermal/thermal_core.c > =================================================================== > --- linux-pm.orig/drivers/thermal/thermal_core.c > +++ linux-pm/drivers/thermal/thermal_core.c > @@ -1278,6 +1278,7 @@ thermal_zone_device_register_with_trips( > int passive_delay, int polling_delay) > { > struct thermal_zone_device *tz; > + struct thermal_trip *trip; > int id; > int result; > struct thermal_governor *governor; > @@ -1356,13 +1357,19 @@ thermal_zone_device_register_with_trips( > tz->devdata = devdata; > memcpy(tz->trips, trips, num_trips * sizeof(*trips)); > tz->num_trips = num_trips; > + for_each_trip(tz, trip) { > + if (mask & 1) > + trip->flags |= THERMAL_TRIP_FLAG_RW_TEMP; > + > + mask >>= 1; > + } > > thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay); > thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay); > > /* sys I/F */ > /* Add nodes that are always present via .groups */ > - result = thermal_zone_create_device_groups(tz, mask); > + result = thermal_zone_create_device_groups(tz); > if (result) > goto remove_id; > > Index: linux-pm/drivers/thermal/thermal_core.h > =================================================================== > --- linux-pm.orig/drivers/thermal/thermal_core.h > +++ linux-pm/drivers/thermal/thermal_core.h > @@ -131,7 +131,7 @@ void thermal_zone_trip_updated(struct th > int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); > > /* sysfs I/F */ > -int thermal_zone_create_device_groups(struct thermal_zone_device *, int); > +int thermal_zone_create_device_groups(struct thermal_zone_device *tz); > void thermal_zone_destroy_device_groups(struct thermal_zone_device *); > void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); > void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev); > Index: linux-pm/drivers/thermal/thermal_sysfs.c > =================================================================== > --- linux-pm.orig/drivers/thermal/thermal_sysfs.c > +++ linux-pm/drivers/thermal/thermal_sysfs.c > @@ -392,17 +392,16 @@ static const struct attribute_group *the > /** > * create_trip_attrs() - create attributes for trip points > * @tz: the thermal zone device > - * @mask: Writeable trip point bitmap. > * > * helper function to instantiate sysfs entries for every trip > * point and its properties of a struct thermal_zone_device. > * > * Return: 0 on success, the proper error value otherwise. > */ > -static int create_trip_attrs(struct thermal_zone_device *tz, int mask) > +static int create_trip_attrs(struct thermal_zone_device *tz) > { > + const struct thermal_trip *trip; > struct attribute **attrs; > - int indx; > > /* This function works only for zones with at least one trip */ > if (tz->num_trips <= 0) > @@ -437,7 +436,9 @@ static int create_trip_attrs(struct ther > return -ENOMEM; > } > > - for (indx = 0; indx < tz->num_trips; indx++) { > + for_each_trip(tz, trip) { > + int indx = thermal_zone_trip_id(tz, trip); > + > /* create trip type attribute */ > snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, > "trip_point_%d_type", indx); > @@ -458,7 +459,7 @@ static int create_trip_attrs(struct ther > tz->trip_temp_attrs[indx].name; > tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; > tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; > - if (mask & (1 << indx)) { > + if (trip->flags & THERMAL_TRIP_FLAG_RW_TEMP) { > tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; > tz->trip_temp_attrs[indx].attr.store = > trip_point_temp_store; > @@ -473,7 +474,7 @@ static int create_trip_attrs(struct ther > tz->trip_hyst_attrs[indx].name; > tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; > tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; > - if (tz->ops.set_trip_hyst) { > + if (trip->flags & THERMAL_TRIP_FLAG_RW_HYST) { > tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; > tz->trip_hyst_attrs[indx].attr.store = > trip_point_hyst_store; > @@ -505,8 +506,7 @@ static void destroy_trip_attrs(struct th > kfree(tz->trips_attribute_group.attrs); > } > > -int thermal_zone_create_device_groups(struct thermal_zone_device *tz, > - int mask) > +int thermal_zone_create_device_groups(struct thermal_zone_device *tz) > { > const struct attribute_group **groups; > int i, size, result; > @@ -522,7 +522,7 @@ int thermal_zone_create_device_groups(st > groups[i] = thermal_zone_attribute_groups[i]; > > if (tz->num_trips) { > - result = create_trip_attrs(tz, mask); > + result = create_trip_attrs(tz); > if (result) { > kfree(groups); > > > > >
Index: linux-pm/include/linux/thermal.h =================================================================== --- linux-pm.orig/include/linux/thermal.h +++ linux-pm/include/linux/thermal.h @@ -64,15 +64,23 @@ enum thermal_notify_event { * @threshold: trip crossing notification threshold miliCelsius * @type: trip point type * @priv: pointer to driver data associated with this trip + * @flags: flags representing binary properties of the trip */ struct thermal_trip { int temperature; int hysteresis; int threshold; enum thermal_trip_type type; + u8 flags; void *priv; }; +#define THERMAL_TRIP_FLAG_RW_TEMP BIT(0) +#define THERMAL_TRIP_FLAG_RW_HYST BIT(1) + +#define THERMAL_TRIP_FLAG_RW (THERMAL_TRIP_FLAG_RW_TEMP | \ + THERMAL_TRIP_FLAG_RW_HYST) + struct thermal_zone_device_ops { int (*bind) (struct thermal_zone_device *, struct thermal_cooling_device *); Index: linux-pm/drivers/thermal/thermal_core.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.c +++ linux-pm/drivers/thermal/thermal_core.c @@ -1278,6 +1278,7 @@ thermal_zone_device_register_with_trips( int passive_delay, int polling_delay) { struct thermal_zone_device *tz; + struct thermal_trip *trip; int id; int result; struct thermal_governor *governor; @@ -1356,13 +1357,19 @@ thermal_zone_device_register_with_trips( tz->devdata = devdata; memcpy(tz->trips, trips, num_trips * sizeof(*trips)); tz->num_trips = num_trips; + for_each_trip(tz, trip) { + if (mask & 1) + trip->flags |= THERMAL_TRIP_FLAG_RW_TEMP; + + mask >>= 1; + } thermal_set_delay_jiffies(&tz->passive_delay_jiffies, passive_delay); thermal_set_delay_jiffies(&tz->polling_delay_jiffies, polling_delay); /* sys I/F */ /* Add nodes that are always present via .groups */ - result = thermal_zone_create_device_groups(tz, mask); + result = thermal_zone_create_device_groups(tz); if (result) goto remove_id; Index: linux-pm/drivers/thermal/thermal_core.h =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.h +++ linux-pm/drivers/thermal/thermal_core.h @@ -131,7 +131,7 @@ void thermal_zone_trip_updated(struct th int __thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); /* sysfs I/F */ -int thermal_zone_create_device_groups(struct thermal_zone_device *, int); +int thermal_zone_create_device_groups(struct thermal_zone_device *tz); void thermal_zone_destroy_device_groups(struct thermal_zone_device *); void thermal_cooling_device_setup_sysfs(struct thermal_cooling_device *); void thermal_cooling_device_destroy_sysfs(struct thermal_cooling_device *cdev); Index: linux-pm/drivers/thermal/thermal_sysfs.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_sysfs.c +++ linux-pm/drivers/thermal/thermal_sysfs.c @@ -392,17 +392,16 @@ static const struct attribute_group *the /** * create_trip_attrs() - create attributes for trip points * @tz: the thermal zone device - * @mask: Writeable trip point bitmap. * * helper function to instantiate sysfs entries for every trip * point and its properties of a struct thermal_zone_device. * * Return: 0 on success, the proper error value otherwise. */ -static int create_trip_attrs(struct thermal_zone_device *tz, int mask) +static int create_trip_attrs(struct thermal_zone_device *tz) { + const struct thermal_trip *trip; struct attribute **attrs; - int indx; /* This function works only for zones with at least one trip */ if (tz->num_trips <= 0) @@ -437,7 +436,9 @@ static int create_trip_attrs(struct ther return -ENOMEM; } - for (indx = 0; indx < tz->num_trips; indx++) { + for_each_trip(tz, trip) { + int indx = thermal_zone_trip_id(tz, trip); + /* create trip type attribute */ snprintf(tz->trip_type_attrs[indx].name, THERMAL_NAME_LENGTH, "trip_point_%d_type", indx); @@ -458,7 +459,7 @@ static int create_trip_attrs(struct ther tz->trip_temp_attrs[indx].name; tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO; tz->trip_temp_attrs[indx].attr.show = trip_point_temp_show; - if (mask & (1 << indx)) { + if (trip->flags & THERMAL_TRIP_FLAG_RW_TEMP) { tz->trip_temp_attrs[indx].attr.attr.mode |= S_IWUSR; tz->trip_temp_attrs[indx].attr.store = trip_point_temp_store; @@ -473,7 +474,7 @@ static int create_trip_attrs(struct ther tz->trip_hyst_attrs[indx].name; tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO; tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show; - if (tz->ops.set_trip_hyst) { + if (trip->flags & THERMAL_TRIP_FLAG_RW_HYST) { tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR; tz->trip_hyst_attrs[indx].attr.store = trip_point_hyst_store; @@ -505,8 +506,7 @@ static void destroy_trip_attrs(struct th kfree(tz->trips_attribute_group.attrs); } -int thermal_zone_create_device_groups(struct thermal_zone_device *tz, - int mask) +int thermal_zone_create_device_groups(struct thermal_zone_device *tz) { const struct attribute_group **groups; int i, size, result; @@ -522,7 +522,7 @@ int thermal_zone_create_device_groups(st groups[i] = thermal_zone_attribute_groups[i]; if (tz->num_trips) { - result = create_trip_attrs(tz, mask); + result = create_trip_attrs(tz); if (result) { kfree(groups);