From b8643a529930802778b04a4fe3f5cd53d9d6057c Mon Sep 17 00:00:00 2001 From: Lukasz Luba Date: Thu, 10 Dec 2020 14:30:10 +0000 Subject: thermal: devfreq_cooling: change tracing function and arguments Prepare for deleting the static and dynamic power calculation and clean the trace function. These two fields are going to be removed in the next changes. Reviewed-by: Ionela Voinescu Reviewed-by: Steven Rostedt (VMware) # for tracing code Signed-off-by: Lukasz Luba Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20201210143014.24685-2-lukasz.luba@arm.com --- include/trace/events/thermal.h | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'include') diff --git a/include/trace/events/thermal.h b/include/trace/events/thermal.h index 135e5421f003..8a5f04888abd 100644 --- a/include/trace/events/thermal.h +++ b/include/trace/events/thermal.h @@ -153,31 +153,30 @@ TRACE_EVENT(thermal_power_cpu_limit, TRACE_EVENT(thermal_power_devfreq_get_power, TP_PROTO(struct thermal_cooling_device *cdev, struct devfreq_dev_status *status, unsigned long freq, - u32 dynamic_power, u32 static_power, u32 power), + u32 power), - TP_ARGS(cdev, status, freq, dynamic_power, static_power, power), + TP_ARGS(cdev, status, freq, power), TP_STRUCT__entry( __string(type, cdev->type ) __field(unsigned long, freq ) - __field(u32, load ) - __field(u32, dynamic_power ) - __field(u32, static_power ) + __field(u32, busy_time) + __field(u32, total_time) __field(u32, power) ), TP_fast_assign( __assign_str(type, cdev->type); __entry->freq = freq; - __entry->load = (100 * status->busy_time) / status->total_time; - __entry->dynamic_power = dynamic_power; - __entry->static_power = static_power; + __entry->busy_time = status->busy_time; + __entry->total_time = status->total_time; __entry->power = power; ), - TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u power=%u", + TP_printk("type=%s freq=%lu load=%u power=%u", __get_str(type), __entry->freq, - __entry->load, __entry->dynamic_power, __entry->static_power, + __entry->total_time == 0 ? 0 : + (100 * __entry->busy_time) / __entry->total_time, __entry->power) ); -- cgit v1.2.3 From 84e0d87c9944eb36ae6037af5cb6905f67c074c5 Mon Sep 17 00:00:00 2001 From: Lukasz Luba Date: Thu, 10 Dec 2020 14:30:12 +0000 Subject: thermal: devfreq_cooling: add new registration functions with Energy Model The Energy Model (EM) framework supports devices such as Devfreq. Create new registration function which automatically register EM for the thermal devfreq_cooling devices. This patch prepares the code for coming changes which are going to replace old power model with the new EM. Reviewed-by: Ionela Voinescu Signed-off-by: Lukasz Luba Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20201210143014.24685-4-lukasz.luba@arm.com --- drivers/thermal/devfreq_cooling.c | 54 ++++++++++++++++++++++++++++++++++++++- include/linux/devfreq_cooling.h | 10 ++++++++ 2 files changed, 63 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c index afcebadbad24..6cea027d89a3 100644 --- a/drivers/thermal/devfreq_cooling.c +++ b/drivers/thermal/devfreq_cooling.c @@ -12,6 +12,7 @@ #include #include +#include #include #include #include @@ -576,22 +577,73 @@ struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df) } EXPORT_SYMBOL_GPL(devfreq_cooling_register); +/** + * devfreq_cooling_em_register_power() - Register devfreq cooling device with + * power information and automatically register Energy Model (EM) + * @df: Pointer to devfreq device. + * @dfc_power: Pointer to devfreq_cooling_power. + * + * Register a devfreq cooling device and automatically register EM. The + * available OPPs must be registered for the device. + * + * If @dfc_power is provided, the cooling device is registered with the + * power extensions. It is using the simple Energy Model which requires + * "dynamic-power-coefficient" a devicetree property. To not break drivers + * which miss that DT property, the function won't bail out when the EM + * registration failed. The cooling device will be registered if everything + * else is OK. + */ +struct thermal_cooling_device * +devfreq_cooling_em_register(struct devfreq *df, + struct devfreq_cooling_power *dfc_power) +{ + struct thermal_cooling_device *cdev; + struct device *dev; + int ret; + + if (IS_ERR_OR_NULL(df)) + return ERR_PTR(-EINVAL); + + dev = df->dev.parent; + + ret = dev_pm_opp_of_register_em(dev, NULL); + if (ret) + dev_dbg(dev, "Unable to register EM for devfreq cooling device (%d)\n", + ret); + + cdev = of_devfreq_cooling_register_power(dev->of_node, df, dfc_power); + + if (IS_ERR_OR_NULL(cdev)) + em_dev_unregister_perf_domain(dev); + + return cdev; +} +EXPORT_SYMBOL_GPL(devfreq_cooling_em_register); + /** * devfreq_cooling_unregister() - Unregister devfreq cooling device. * @cdev: Pointer to devfreq cooling device to unregister. + * + * Unregisters devfreq cooling device and related Energy Model if it was + * present. */ void devfreq_cooling_unregister(struct thermal_cooling_device *cdev) { struct devfreq_cooling_device *dfc; + struct device *dev; - if (!cdev) + if (IS_ERR_OR_NULL(cdev)) return; dfc = cdev->devdata; + dev = dfc->devfreq->dev.parent; thermal_cooling_device_unregister(dfc->cdev); ida_simple_remove(&devfreq_ida, dfc->id); dev_pm_qos_remove_request(&dfc->req_max_freq); + + em_dev_unregister_perf_domain(dev); + kfree(dfc->power_table); kfree(dfc->freq_table); diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h index 9df2dfca68dd..7a9fbcc7b265 100644 --- a/include/linux/devfreq_cooling.h +++ b/include/linux/devfreq_cooling.h @@ -65,6 +65,9 @@ struct thermal_cooling_device * of_devfreq_cooling_register(struct device_node *np, struct devfreq *df); struct thermal_cooling_device *devfreq_cooling_register(struct devfreq *df); void devfreq_cooling_unregister(struct thermal_cooling_device *dfc); +struct thermal_cooling_device * +devfreq_cooling_em_register(struct devfreq *df, + struct devfreq_cooling_power *dfc_power); #else /* !CONFIG_DEVFREQ_THERMAL */ @@ -87,6 +90,13 @@ devfreq_cooling_register(struct devfreq *df) return ERR_PTR(-EINVAL); } +static inline struct thermal_cooling_device * +devfreq_cooling_em_register(struct devfreq *df, + struct devfreq_cooling_power *dfc_power) +{ + return ERR_PTR(-EINVAL); +} + static inline void devfreq_cooling_unregister(struct thermal_cooling_device *dfc) { -- cgit v1.2.3 From 615510fe13bd2434610193f1acab53027d5146d6 Mon Sep 17 00:00:00 2001 From: Lukasz Luba Date: Thu, 10 Dec 2020 14:30:13 +0000 Subject: thermal: devfreq_cooling: remove old power model and use EM Remove old power model and use new Energy Model to calculate the power budget. It drops static + dynamic power calculations and power table in order to use Energy Model performance domain data. This model should be easy to use and could find more users. It is also less complicated to setup the needed structures. Reviewed-by: Ionela Voinescu Signed-off-by: Lukasz Luba Signed-off-by: Daniel Lezcano Link: https://lore.kernel.org/r/20201210143014.24685-5-lukasz.luba@arm.com --- drivers/thermal/devfreq_cooling.c | 307 ++++++++++++-------------------------- include/linux/devfreq_cooling.h | 17 --- 2 files changed, 97 insertions(+), 227 deletions(-) (limited to 'include') diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c index 6cea027d89a3..df1049a34777 100644 --- a/drivers/thermal/devfreq_cooling.c +++ b/drivers/thermal/devfreq_cooling.c @@ -34,20 +34,17 @@ static DEFINE_IDA(devfreq_ida); * @cdev: Pointer to associated thermal cooling device. * @devfreq: Pointer to associated devfreq device. * @cooling_state: Current cooling state. - * @power_table: Pointer to table with maximum power draw for each - * cooling state. State is the index into the table, and - * the power is in mW. * @freq_table: Pointer to a table with the frequencies sorted in descending * order. You can index the table by cooling device state - * @freq_table_size: Size of the @freq_table and @power_table - * @power_ops: Pointer to devfreq_cooling_power, used to generate the - * @power_table. + * @max_state: It is the last index, that is, one less than the number of the + * OPPs + * @power_ops: Pointer to devfreq_cooling_power, a more precised model. * @res_util: Resource utilization scaling factor for the power. * It is multiplied by 100 to minimize the error. It is used * for estimation of the power budget instead of using - * 'utilization' (which is 'busy_time / 'total_time'). - * The 'res_util' range is from 100 to (power_table[state] * 100) - * for the corresponding 'state'. + * 'utilization' (which is 'busy_time' / 'total_time'). + * The 'res_util' range is from 100 to power * 100 for the + * corresponding 'state'. * @capped_state: index to cooling state with in dynamic power budget * @req_max_freq: PM QoS request for limiting the maximum frequency * of the devfreq device. @@ -57,9 +54,8 @@ struct devfreq_cooling_device { struct thermal_cooling_device *cdev; struct devfreq *devfreq; unsigned long cooling_state; - u32 *power_table; u32 *freq_table; - size_t freq_table_size; + size_t max_state; struct devfreq_cooling_power *power_ops; u32 res_util; int capped_state; @@ -71,7 +67,7 @@ static int devfreq_cooling_get_max_state(struct thermal_cooling_device *cdev, { struct devfreq_cooling_device *dfc = cdev->devdata; - *state = dfc->freq_table_size - 1; + *state = dfc->max_state; return 0; } @@ -93,16 +89,22 @@ static int devfreq_cooling_set_cur_state(struct thermal_cooling_device *cdev, struct devfreq *df = dfc->devfreq; struct device *dev = df->dev.parent; unsigned long freq; + int perf_idx; if (state == dfc->cooling_state) return 0; dev_dbg(dev, "Setting cooling state %lu\n", state); - if (state >= dfc->freq_table_size) + if (state > dfc->max_state) return -EINVAL; - freq = dfc->freq_table[state]; + if (dev->em_pd) { + perf_idx = dfc->max_state - state; + freq = dev->em_pd->table[perf_idx].frequency * 1000; + } else { + freq = dfc->freq_table[state]; + } dev_pm_qos_update_request(&dfc->req_max_freq, DIV_ROUND_UP(freq, HZ_PER_KHZ)); @@ -113,24 +115,23 @@ static int devfreq_cooling_set_cur_state(struct thermal_cooling_device *cdev, } /** - * freq_get_state() - get the cooling state corresponding to a frequency - * @dfc: Pointer to devfreq cooling device - * @freq: frequency in Hz + * get_perf_idx() - get the performance index corresponding to a frequency + * @em_pd: Pointer to device's Energy Model + * @freq: frequency in kHz * - * Return: the cooling state associated with the @freq, or - * THERMAL_CSTATE_INVALID if it wasn't found. + * Return: the performance index associated with the @freq, or + * -EINVAL if it wasn't found. */ -static unsigned long -freq_get_state(struct devfreq_cooling_device *dfc, unsigned long freq) +static int get_perf_idx(struct em_perf_domain *em_pd, unsigned long freq) { int i; - for (i = 0; i < dfc->freq_table_size; i++) { - if (dfc->freq_table[i] == freq) + for (i = 0; i < em_pd->nr_perf_states; i++) { + if (em_pd->table[i].frequency == freq) return i; } - return THERMAL_CSTATE_INVALID; + return -EINVAL; } static unsigned long get_voltage(struct devfreq *df, unsigned long freq) @@ -161,73 +162,6 @@ static unsigned long get_voltage(struct devfreq *df, unsigned long freq) return voltage; } -/** - * get_static_power() - calculate the static power - * @dfc: Pointer to devfreq cooling device - * @freq: Frequency in Hz - * - * Calculate the static power in milliwatts using the supplied - * get_static_power(). The current voltage is calculated using the - * OPP library. If no get_static_power() was supplied, assume the - * static power is negligible. - */ -static unsigned long -get_static_power(struct devfreq_cooling_device *dfc, unsigned long freq) -{ - struct devfreq *df = dfc->devfreq; - unsigned long voltage; - - if (!dfc->power_ops->get_static_power) - return 0; - - voltage = get_voltage(df, freq); - - if (voltage == 0) - return 0; - - return dfc->power_ops->get_static_power(df, voltage); -} - -/** - * get_dynamic_power - calculate the dynamic power - * @dfc: Pointer to devfreq cooling device - * @freq: Frequency in Hz - * @voltage: Voltage in millivolts - * - * Calculate the dynamic power in milliwatts consumed by the device at - * frequency @freq and voltage @voltage. If the get_dynamic_power() - * was supplied as part of the devfreq_cooling_power struct, then that - * function is used. Otherwise, a simple power model (Pdyn = Coeff * - * Voltage^2 * Frequency) is used. - */ -static unsigned long -get_dynamic_power(struct devfreq_cooling_device *dfc, unsigned long freq, - unsigned long voltage) -{ - u64 power; - u32 freq_mhz; - struct devfreq_cooling_power *dfc_power = dfc->power_ops; - - if (dfc_power->get_dynamic_power) - return dfc_power->get_dynamic_power(dfc->devfreq, freq, - voltage); - - freq_mhz = freq / 1000000; - power = (u64)dfc_power->dyn_power_coeff * freq_mhz * voltage * voltage; - do_div(power, 1000000000); - - return power; -} - - -static inline unsigned long get_total_power(struct devfreq_cooling_device *dfc, - unsigned long freq, - unsigned long voltage) -{ - return get_static_power(dfc, freq) + get_dynamic_power(dfc, freq, - voltage); -} - static void _normalize_load(struct devfreq_dev_status *status) { if (status->total_time > 0xfffff) { @@ -247,13 +181,12 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd { struct devfreq_cooling_device *dfc = cdev->devdata; struct devfreq *df = dfc->devfreq; + struct device *dev = df->dev.parent; struct devfreq_dev_status status; unsigned long state; unsigned long freq; unsigned long voltage; - u32 dyn_power = 0; - u32 static_power = 0; - int res; + int res, perf_idx; mutex_lock(&df->lock); status = df->last_status; @@ -261,13 +194,7 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd freq = status.current_frequency; - state = freq_get_state(dfc, freq); - if (state == THERMAL_CSTATE_INVALID) { - res = -EAGAIN; - goto fail; - } - - if (dfc->power_ops->get_real_power) { + if (dfc->power_ops && dfc->power_ops->get_real_power) { voltage = get_voltage(df, freq); if (voltage == 0) { res = -EINVAL; @@ -277,7 +204,7 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd res = dfc->power_ops->get_real_power(df, power, freq, voltage); if (!res) { state = dfc->capped_state; - dfc->res_util = dfc->power_table[state]; + dfc->res_util = dev->em_pd->table[state].power; dfc->res_util *= SCALE_ERROR_MITIGATION; if (*power > 1) @@ -286,17 +213,19 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd goto fail; } } else { - dyn_power = dfc->power_table[state]; + /* Energy Model frequencies are in kHz */ + perf_idx = get_perf_idx(dev->em_pd, freq / 1000); + if (perf_idx < 0) { + res = -EAGAIN; + goto fail; + } _normalize_load(&status); - /* Scale dynamic power for utilization */ - dyn_power *= status.busy_time; - dyn_power >>= 10; - /* Get static power */ - static_power = get_static_power(dfc, freq); - - *power = dyn_power + static_power; + /* Scale power for utilization */ + *power = dev->em_pd->table[perf_idx].power; + *power *= status.busy_time; + *power >>= 10; } trace_thermal_power_devfreq_get_power(cdev, &status, freq, *power); @@ -309,20 +238,19 @@ fail: } static int devfreq_cooling_state2power(struct thermal_cooling_device *cdev, - unsigned long state, - u32 *power) + unsigned long state, u32 *power) { struct devfreq_cooling_device *dfc = cdev->devdata; - unsigned long freq; - u32 static_power; + struct devfreq *df = dfc->devfreq; + struct device *dev = df->dev.parent; + int perf_idx; - if (state >= dfc->freq_table_size) + if (state > dfc->max_state) return -EINVAL; - freq = dfc->freq_table[state]; - static_power = get_static_power(dfc, freq); + perf_idx = dfc->max_state - state; + *power = dev->em_pd->table[perf_idx].power; - *power = dfc->power_table[state] + static_power; return 0; } @@ -331,10 +259,9 @@ static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev, { struct devfreq_cooling_device *dfc = cdev->devdata; struct devfreq *df = dfc->devfreq; + struct device *dev = df->dev.parent; struct devfreq_dev_status status; unsigned long freq; - s32 dyn_power; - u32 static_power; s32 est_power; int i; @@ -344,32 +271,28 @@ static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev, freq = status.current_frequency; - if (dfc->power_ops->get_real_power) { + if (dfc->power_ops && dfc->power_ops->get_real_power) { /* Scale for resource utilization */ est_power = power * dfc->res_util; est_power /= SCALE_ERROR_MITIGATION; } else { - static_power = get_static_power(dfc, freq); - - dyn_power = power - static_power; - dyn_power = dyn_power > 0 ? dyn_power : 0; - /* Scale dynamic power for utilization */ _normalize_load(&status); - dyn_power <<= 10; - est_power = dyn_power / status.busy_time; + est_power = power << 10; + est_power /= status.busy_time; } /* * Find the first cooling state that is within the power - * budget for dynamic power. + * budget. The EM power table is sorted ascending. */ - for (i = 0; i < dfc->freq_table_size - 1; i++) - if (est_power >= dfc->power_table[i]) + for (i = dfc->max_state; i > 0; i--) + if (est_power >= dev->em_pd->table[i].power) break; - *state = i; - dfc->capped_state = i; + *state = dfc->max_state - i; + dfc->capped_state = *state; + trace_thermal_power_devfreq_limit(cdev, freq, *state, power); return 0; } @@ -381,91 +304,43 @@ static struct thermal_cooling_device_ops devfreq_cooling_ops = { }; /** - * devfreq_cooling_gen_tables() - Generate power and freq tables. - * @dfc: Pointer to devfreq cooling device. - * - * Generate power and frequency tables: the power table hold the - * device's maximum power usage at each cooling state (OPP). The - * static and dynamic power using the appropriate voltage and - * frequency for the state, is acquired from the struct - * devfreq_cooling_power, and summed to make the maximum power draw. - * - * The frequency table holds the frequencies in descending order. - * That way its indexed by cooling device state. + * devfreq_cooling_gen_tables() - Generate frequency table. + * @dfc: Pointer to devfreq cooling device. + * @num_opps: Number of OPPs * - * The tables are malloced, and pointers put in dfc. They must be - * freed when unregistering the devfreq cooling device. + * Generate frequency table which holds the frequencies in descending + * order. That way its indexed by cooling device state. This is for + * compatibility with drivers which do not register Energy Model. * * Return: 0 on success, negative error code on failure. */ -static int devfreq_cooling_gen_tables(struct devfreq_cooling_device *dfc) +static int devfreq_cooling_gen_tables(struct devfreq_cooling_device *dfc, + int num_opps) { struct devfreq *df = dfc->devfreq; struct device *dev = df->dev.parent; - int ret, num_opps; unsigned long freq; - u32 *power_table = NULL; - u32 *freq_table; int i; - num_opps = dev_pm_opp_get_opp_count(dev); - - if (dfc->power_ops) { - power_table = kcalloc(num_opps, sizeof(*power_table), - GFP_KERNEL); - if (!power_table) - return -ENOMEM; - } - - freq_table = kcalloc(num_opps, sizeof(*freq_table), + dfc->freq_table = kcalloc(num_opps, sizeof(*dfc->freq_table), GFP_KERNEL); - if (!freq_table) { - ret = -ENOMEM; - goto free_power_table; - } + if (!dfc->freq_table) + return -ENOMEM; for (i = 0, freq = ULONG_MAX; i < num_opps; i++, freq--) { - unsigned long power, voltage; struct dev_pm_opp *opp; opp = dev_pm_opp_find_freq_floor(dev, &freq); if (IS_ERR(opp)) { - ret = PTR_ERR(opp); - goto free_tables; + kfree(dfc->freq_table); + return PTR_ERR(opp); } - voltage = dev_pm_opp_get_voltage(opp) / 1000; /* mV */ dev_pm_opp_put(opp); - - if (dfc->power_ops) { - if (dfc->power_ops->get_real_power) - power = get_total_power(dfc, freq, voltage); - else - power = get_dynamic_power(dfc, freq, voltage); - - dev_dbg(dev, "Power table: %lu MHz @ %lu mV: %lu = %lu mW\n", - freq / 1000000, voltage, power, power); - - power_table[i] = power; - } - - freq_table[i] = freq; + dfc->freq_table[i] = freq; } - if (dfc->power_ops) - dfc->power_table = power_table; - - dfc->freq_table = freq_table; - dfc->freq_table_size = num_opps; - return 0; - -free_tables: - kfree(freq_table); -free_power_table: - kfree(power_table); - - return ret; } /** @@ -488,9 +363,10 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, struct devfreq_cooling_power *dfc_power) { struct thermal_cooling_device *cdev; + struct device *dev = df->dev.parent; struct devfreq_cooling_device *dfc; char dev_name[THERMAL_NAME_LENGTH]; - int err; + int err, num_opps; dfc = kzalloc(sizeof(*dfc), GFP_KERNEL); if (!dfc) @@ -498,28 +374,44 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, dfc->devfreq = df; - if (dfc_power) { - dfc->power_ops = dfc_power; - + if (dev->em_pd) { devfreq_cooling_ops.get_requested_power = devfreq_cooling_get_requested_power; devfreq_cooling_ops.state2power = devfreq_cooling_state2power; devfreq_cooling_ops.power2state = devfreq_cooling_power2state; + + dfc->power_ops = dfc_power; + + num_opps = em_pd_nr_perf_states(dev->em_pd); + } else { + /* Backward compatibility for drivers which do not use IPA */ + dev_dbg(dev, "missing EM for cooling device\n"); + + num_opps = dev_pm_opp_get_opp_count(dev); + + err = devfreq_cooling_gen_tables(dfc, num_opps); + if (err) + goto free_dfc; } - err = devfreq_cooling_gen_tables(dfc); - if (err) + if (num_opps <= 0) { + err = -EINVAL; goto free_dfc; + } + + /* max_state is an index, not a counter */ + dfc->max_state = num_opps - 1; - err = dev_pm_qos_add_request(df->dev.parent, &dfc->req_max_freq, + err = dev_pm_qos_add_request(dev, &dfc->req_max_freq, DEV_PM_QOS_MAX_FREQUENCY, PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE); if (err < 0) - goto free_tables; + goto free_table; err = ida_simple_get(&devfreq_ida, 0, 0, GFP_KERNEL); if (err < 0) goto remove_qos_req; + dfc->id = err; snprintf(dev_name, sizeof(dev_name), "thermal-devfreq-%d", dfc->id); @@ -528,7 +420,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, &devfreq_cooling_ops); if (IS_ERR(cdev)) { err = PTR_ERR(cdev); - dev_err(df->dev.parent, + dev_err(dev, "Failed to register devfreq cooling device (%d)\n", err); goto release_ida; @@ -540,12 +432,9 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df, release_ida: ida_simple_remove(&devfreq_ida, dfc->id); - remove_qos_req: dev_pm_qos_remove_request(&dfc->req_max_freq); - -free_tables: - kfree(dfc->power_table); +free_table: kfree(dfc->freq_table); free_dfc: kfree(dfc); @@ -644,9 +533,7 @@ void devfreq_cooling_unregister(struct thermal_cooling_device *cdev) em_dev_unregister_perf_domain(dev); - kfree(dfc->power_table); kfree(dfc->freq_table); - kfree(dfc); } EXPORT_SYMBOL_GPL(devfreq_cooling_unregister); diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h index 7a9fbcc7b265..14baa73fc2de 100644 --- a/include/linux/devfreq_cooling.h +++ b/include/linux/devfreq_cooling.h @@ -16,17 +16,6 @@ /** * struct devfreq_cooling_power - Devfreq cooling power ops - * @get_static_power: Take voltage, in mV, and return the static power - * in mW. If NULL, the static power is assumed - * to be 0. - * @get_dynamic_power: Take voltage, in mV, and frequency, in HZ, and - * return the dynamic power draw in mW. If NULL, - * a simple power model is used. - * @dyn_power_coeff: Coefficient for the simple dynamic power model in - * mW/(MHz mV mV). - * If get_dynamic_power() is NULL, then the - * dynamic power is calculated as - * @dyn_power_coeff * frequency * voltage^2 * @get_real_power: When this is set, the framework uses it to ask the * device driver for the actual power. * Some devices have more sophisticated methods @@ -46,14 +35,8 @@ * max total (static + dynamic) power value for each OPP. */ struct devfreq_cooling_power { - unsigned long (*get_static_power)(struct devfreq *devfreq, - unsigned long voltage); - unsigned long (*get_dynamic_power)(struct devfreq *devfreq, - unsigned long freq, - unsigned long voltage); int (*get_real_power)(struct devfreq *df, u32 *power, unsigned long freq, unsigned long voltage); - unsigned long dyn_power_coeff; }; #ifdef CONFIG_DEVFREQ_THERMAL -- cgit v1.2.3 From d7203eedf4f68e9909fd489453168a9d26bf0c3d Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 10 Dec 2020 13:15:11 +0100 Subject: thermal/core: Add critical and hot ops Currently there is no way to the sensors to directly call an ops in interrupt mode without calling thermal_zone_device_update assuming all the trip points are defined. A sensor may want to do something special if a trip point is hot or critical. This patch adds the critical and hot ops to the thermal zone device, so a sensor can directly invoke them or let the thermal framework to call the sensor specific ones. Tested-by: Kai-Heng Feng Signed-off-by: Daniel Lezcano Reviewed-by: Lukasz Luba Link: https://lore.kernel.org/r/20201210121514.25760-2-daniel.lezcano@linaro.org --- drivers/thermal/thermal_core.c | 43 ++++++++++++++++++++++++++---------------- include/linux/thermal.h | 3 +++ 2 files changed, 30 insertions(+), 16 deletions(-) (limited to 'include') diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 64de09861c05..4a291d205d5c 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -380,6 +380,25 @@ static void thermal_emergency_poweroff(void) msecs_to_jiffies(poweroff_delay_ms)); } +void thermal_zone_device_critical(struct thermal_zone_device *tz) +{ + dev_emerg(&tz->device, "%s: critical temperature reached, " + "shutting down\n", tz->type); + + mutex_lock(&poweroff_lock); + if (!power_off_triggered) { + /* + * Queue a backup emergency shutdown in the event of + * orderly_poweroff failure + */ + thermal_emergency_poweroff(); + orderly_poweroff(true); + power_off_triggered = true; + } + mutex_unlock(&poweroff_lock); +} +EXPORT_SYMBOL(thermal_zone_device_critical); + static void handle_critical_trips(struct thermal_zone_device *tz, int trip, enum thermal_trip_type trip_type) { @@ -396,22 +415,10 @@ static void handle_critical_trips(struct thermal_zone_device *tz, if (tz->ops->notify) tz->ops->notify(tz, trip, trip_type); - if (trip_type == THERMAL_TRIP_CRITICAL) { - dev_emerg(&tz->device, - "critical temperature reached (%d C), shutting down\n", - tz->temperature / 1000); - mutex_lock(&poweroff_lock); - if (!power_off_triggered) { - /* - * Queue a backup emergency shutdown in the event of - * orderly_poweroff failure - */ - thermal_emergency_poweroff(); - orderly_poweroff(true); - power_off_triggered = true; - } - mutex_unlock(&poweroff_lock); - } + if (trip_type == THERMAL_TRIP_HOT && tz->ops->hot) + tz->ops->hot(tz); + else if (trip_type == THERMAL_TRIP_CRITICAL) + tz->ops->critical(tz); } static void handle_thermal_trip(struct thermal_zone_device *tz, int trip) @@ -1336,6 +1343,10 @@ thermal_zone_device_register(const char *type, int trips, int mask, tz->id = id; strlcpy(tz->type, type, sizeof(tz->type)); + + if (!ops->critical) + ops->critical = thermal_zone_device_critical; + tz->ops = ops; tz->tzp = tzp; tz->device.class = &thermal_class; diff --git a/include/linux/thermal.h b/include/linux/thermal.h index d07ea27e72a9..31b84404f047 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -79,6 +79,8 @@ struct thermal_zone_device_ops { enum thermal_trend *); int (*notify) (struct thermal_zone_device *, int, enum thermal_trip_type); + void (*hot)(struct thermal_zone_device *); + void (*critical)(struct thermal_zone_device *); }; struct thermal_cooling_device_ops { @@ -399,6 +401,7 @@ void thermal_cdev_update(struct thermal_cooling_device *); void thermal_notify_framework(struct thermal_zone_device *, int); int thermal_zone_device_enable(struct thermal_zone_device *tz); int thermal_zone_device_disable(struct thermal_zone_device *tz); +void thermal_zone_device_critical(struct thermal_zone_device *tz); #else static inline struct thermal_zone_device *thermal_zone_device_register( const char *type, int trips, int mask, void *devdata, -- cgit v1.2.3