This patch creates a thermal map sysfs node under /sys/class/thermal/thermal_zoneX/. This contains entries named map0, map1 .. mapN. Each map has the following space separated values: trip_type sensor_name cdev_name trip_mask weights
Signed-off-by: Durgadoss R <durgados...@intel.com> --- drivers/thermal/thermal_sys.c | 149 ++++++++++++++++++++++++++++++++++++++++- include/linux/thermal.h | 29 ++++++++ 2 files changed, 176 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 29ec073..a3adc00 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -506,6 +506,41 @@ static void remove_cdev_from_zone(struct thermal_zone *tz, tz->cdev_indx--; } +static void __clean_map_entry(struct thermal_zone *tz, int i) +{ + tz->map[i] = NULL; + sysfs_remove_file(tz->kobj_thermal_map, &tz->map_attr[i]->attr.attr); + /* Free map attributes */ + kfree(tz->map_attr[i]); + tz->map_attr[i] = NULL; +} + +static void remove_sensor_map_entry(struct thermal_zone *tz, + struct thermal_sensor *ts) +{ + int i; + + for (i = 0; i < MAX_MAPS_PER_ZONE; i++) { + if (tz->map[i] && !strnicmp(ts->name, tz->map[i]->sensor_name, + THERMAL_NAME_LENGTH)) { + __clean_map_entry(tz, i); + } + } +} + +static void remove_cdev_map_entry(struct thermal_zone *tz, + struct thermal_cooling_device *cdev) +{ + int i; + + for (i = 0; i < MAX_MAPS_PER_ZONE; i++) { + if (tz->map[i] && !strnicmp(cdev->type, tz->map[i]->cdev_name, + THERMAL_NAME_LENGTH)) { + __clean_map_entry(tz, i); + } + } +} + /* sys I/F for thermal zone */ #define to_thermal_zone(_dev) \ @@ -898,6 +933,52 @@ policy_show(struct device *dev, struct device_attribute *devattr, char *buf) } static ssize_t +map_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) +{ + int i, indx, ret = 0; + struct thermal_zone *tz; + struct thermal_map *map; + struct device *dev; + char *trip; + + /* + * For maps under /sys/class/thermal/zoneX/thermal_map/mapY: + * attr points to mapY + * kobj points to thermal_map + * kobj->parent points to zoneX + */ + + /* Get zone pointer */ + dev = container_of(kobj->parent, struct device, kobj); + tz = to_zone(dev); + if (!tz) + return -EINVAL; + + sscanf(attr->attr.name, "map%d", &indx); + + if (indx < 0 || indx >= MAX_MAPS_PER_ZONE) + return -EINVAL; + + if (!tz->map[indx]) + return sprintf(buf, "<Unavailable>\n"); + + map = tz->map[indx]; + + trip = (map->trip_type == THERMAL_TRIP_ACTIVE) ? + "active" : "passive"; + ret += sprintf(buf, "%s", trip); + ret += sprintf(buf + ret, " %s", map->sensor_name); + ret += sprintf(buf + ret, " %s", map->cdev_name); + ret += sprintf(buf + ret, " 0x%x", map->trip_mask); + + for (i = 0; i < map->num_weights; i++) + ret += sprintf(buf + ret, " %d", map->weights[i]); + + ret += sprintf(buf + ret, "\n"); + return ret; +} + +static ssize_t active_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { int i, indx, ret = 0; @@ -1676,8 +1757,10 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev) mutex_lock(&zone_list_lock); - for_each_thermal_zone(tmp_tz) + for_each_thermal_zone(tmp_tz) { remove_cdev_from_zone(tmp_tz, cdev); + remove_cdev_map_entry(tmp_tz, cdev); + } mutex_unlock(&zone_list_lock); @@ -1931,12 +2014,19 @@ struct thermal_zone *create_thermal_zone(const char *name, void *devdata) if (!tz->kobj_thermal_trip) goto exit_name; + tz->kobj_thermal_map = kobject_create_and_add("thermal_map", + &tz->device.kobj); + if (!tz->kobj_thermal_map) + goto exit_trip; + /* Add this zone to the global list of thermal zones */ mutex_lock(&zone_list_lock); list_add_tail(&tz->node, &thermal_zone_list); mutex_unlock(&zone_list_lock); return tz; +exit_trip: + kobject_del(tz->kobj_thermal_trip); exit_name: device_remove_file(&tz->device, &dev_attr_zone_name); exit_unregister: @@ -2000,6 +2090,12 @@ void remove_thermal_zone(struct thermal_zone *tz) kobject_name(&tz->cdevs[i]->device.kobj)); } + for (i = 0; i < MAX_MAPS_PER_ZONE; i++) + __clean_map_entry(tz, i); + + /* Remove /sys/class/thermal/zoneX/thermal_map */ + kobject_del(tz->kobj_thermal_map); + release_idr(&thermal_zone_idr, &thermal_idr_lock, tz->id); idr_destroy(&tz->idr); @@ -2045,6 +2141,53 @@ struct thermal_sensor *get_sensor_by_name(const char *name) } EXPORT_SYMBOL(get_sensor_by_name); +int add_map_entry(struct thermal_zone *tz, struct thermal_map *map) +{ + int ret, indx; + + if (!tz || !map) + return -EINVAL; + + mutex_lock(&zone_list_lock); + + for (indx = 0; indx < MAX_MAPS_PER_ZONE; indx++) { + if (tz->map[indx] == NULL) + break; + } + + if (indx >= MAX_MAPS_PER_ZONE) { + ret = -EINVAL; + goto exit; + } + + tz->map_attr[indx] = kzalloc(sizeof(struct thermal_map_attr), + GFP_KERNEL); + if (!tz->map_attr[indx]) { + ret = -ENOMEM; + goto exit; + } + + sprintf(tz->map_attr[indx]->name, "map%d", indx); + + tz->map_attr[indx]->attr.attr.name = tz->map_attr[indx]->name; + tz->map_attr[indx]->attr.attr.mode = S_IRUGO; + tz->map_attr[indx]->attr.show = map_show; + + sysfs_attr_init(&tz->map_attr[indx]->attr.attr); + ret = sysfs_create_file(tz->kobj_thermal_map, + &tz->map_attr[indx]->attr.attr); + if (ret) { + kfree(tz->map_attr[indx]); + goto exit; + } + + tz->map[indx] = map; +exit: + mutex_unlock(&zone_list_lock); + return ret; +} +EXPORT_SYMBOL(add_map_entry); + int add_sensor_to_zone(struct thermal_zone *tz, struct thermal_sensor *ts) { int ret; @@ -2251,8 +2394,10 @@ void thermal_sensor_unregister(struct thermal_sensor *ts) mutex_lock(&zone_list_lock); - for_each_thermal_zone(tz) + for_each_thermal_zone(tz) { remove_sensor_from_zone(tz, ts); + remove_sensor_map_entry(tz, ts); + } mutex_unlock(&zone_list_lock); diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 8372f05..581dc87 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -53,6 +53,9 @@ #define MAX_CDEVS_PER_ZONE 5 +/* If we map each sensor with every possible cdev for a zone */ +#define MAX_MAPS_PER_ZONE (MAX_SENSORS_PER_ZONE * MAX_CDEVS_PER_ZONE) + struct thermal_sensor; struct thermal_zone_device; struct thermal_cooling_device; @@ -158,6 +161,21 @@ struct thermal_attr { char name[THERMAL_NAME_LENGTH]; }; +struct thermal_map_attr { + struct kobj_attribute attr; + char name[THERMAL_NAME_LENGTH]; +}; + +struct thermal_map { + enum thermal_trip_type trip_type; + char cdev_name[THERMAL_NAME_LENGTH]; + char sensor_name[THERMAL_NAME_LENGTH]; + + int trip_mask; + int num_weights; + int *weights; +}; + /* * This structure defines the trip points for a sensor. * The actual values for these trip points come from @@ -249,6 +267,15 @@ struct thermal_zone { struct kobject *kobj_thermal_trip; struct kobject *kobj_trip[MAX_SENSORS_PER_ZONE]; struct thermal_trip_point *sensor_trip[MAX_SENSORS_PER_ZONE]; + + /* + * Thermal map information: + * kobj_thermal_map: /sys/class/thermal/zoneX/thermal_map + * map_attr: /sys/class/thermal/zoneX/thermal_map/mapY + */ + struct kobject *kobj_thermal_map; + struct thermal_map_attr *map_attr[MAX_MAPS_PER_ZONE]; + struct thermal_map *map[MAX_MAPS_PER_ZONE]; }; /* Structure that holds thermal governor information */ @@ -332,6 +359,8 @@ int add_cdev_to_zone(struct thermal_zone *, struct thermal_cooling_device *); int add_sensor_trip_info(struct thermal_zone *, struct thermal_sensor *, struct thermal_trip_point *); +int add_map_entry(struct thermal_zone *, struct thermal_map *); + #ifdef CONFIG_NET extern int thermal_generate_netlink_event(u32 orig, enum events event); #else -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/