From: Lukasz Luba <lukasz.luba@arm.com>
To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org,
linux-mediatek@lists.infradead.org,
linux-arm-msm@vger.kernel.org, linux-imx@nxp.com
Cc: Dietmar.Eggemann@arm.com, cw00.choi@samsung.com,
b.zolnierkie@samsung.com, rjw@rjwysocki.net,
sudeep.holla@arm.com, viresh.kumar@linaro.org, nm@ti.com,
sboyd@kernel.org, rui.zhang@intel.com,
amit.kucheria@verdurent.com, daniel.lezcano@linaro.org,
mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org, rostedt@goodmis.org,
qperret@google.com, bsegall@google.com, mgorman@suse.de,
shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com,
kernel@pengutronix.de, khilman@kernel.org, agross@kernel.org,
bjorn.andersson@linaro.org, robh@kernel.org,
matthias.bgg@gmail.com, steven.price@arm.com,
tomeu.vizoso@collabora.com, alyssa.rosenzweig@collabora.com,
airlied@linux.ie, daniel@ffwll.ch, liviu.dudau@arm.com,
lorenzo.pieralisi@arm.com, lukasz.luba@arm.com,
patrick.bellasi@matbug.net, orjan.eide@arm.com,
rdunlap@infradead.org, mka@chromium.org
Subject: [PATCH v7 12/15] thermal: devfreq_cooling: add new registration functions with Energy Model
Date: Mon, 11 May 2020 12:19:09 +0100 [thread overview]
Message-ID: <20200511111912.3001-13-lukasz.luba@arm.com> (raw)
In-Reply-To: <20200511111912.3001-1-lukasz.luba@arm.com>
The Energy Model (EM) framework supports devices such as Devfreq. Create
new registration functions 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.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
---
drivers/thermal/devfreq_cooling.c | 99 ++++++++++++++++++++++++++++++-
include/linux/devfreq_cooling.h | 22 +++++++
2 files changed, 120 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/devfreq_cooling.c b/drivers/thermal/devfreq_cooling.c
index 36ec6a48606c..c7ffed2d6ee0 100644
--- a/drivers/thermal/devfreq_cooling.c
+++ b/drivers/thermal/devfreq_cooling.c
@@ -58,6 +58,8 @@ static DEFINE_IDA(devfreq_ida);
* @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.
+ * @em: Energy Model which represents the associated Devfreq device
+ * @em_registered: Devfreq cooling registered the EM and should free it.
*/
struct devfreq_cooling_device {
int id;
@@ -71,6 +73,8 @@ struct devfreq_cooling_device {
u32 res_util;
int capped_state;
struct dev_pm_qos_request req_max_freq;
+ struct em_perf_domain *em;
+ bool em_registered;
};
static int devfreq_cooling_get_max_state(struct thermal_cooling_device *cdev,
@@ -594,22 +598,115 @@ 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 attempt to register Energy Model (EM)
+ * @df: Pointer to devfreq device.
+ * @dfc_power: Pointer to devfreq_cooling_power.
+ * @em_cb: Callback functions providing the data of the EM
+ *
+ * Register a devfreq cooling device and attempt to register Energy Model. The
+ * available OPPs must be registered for the device.
+ *
+ * If @dfc_power is provided, the cooling device is registered with the
+ * power extensions. If @em_cb is provided it will be called for each OPP to
+ * calculate power value and cost. If @em_cb is not provided then simple Energy
+ * Model is going to be used, which requires "dynamic-power-coefficient" a
+ * devicetree property.
+ */
+struct thermal_cooling_device *
+devfreq_cooling_em_register_power(struct devfreq *df,
+ struct devfreq_cooling_power *dfc_power,
+ struct em_data_callback *em_cb)
+{
+ struct thermal_cooling_device *cdev;
+ struct devfreq_cooling_device *dfc;
+ struct device_node *np = NULL;
+ struct device *dev;
+ int nr_opp, ret;
+
+ if (IS_ERR_OR_NULL(df))
+ return ERR_PTR(-EINVAL);
+
+ dev = df->dev.parent;
+
+ if (em_cb) {
+ nr_opp = dev_pm_opp_get_opp_count(dev);
+ if (nr_opp <= 0) {
+ dev_err(dev, "No valid OPPs found\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ ret = em_dev_register_perf_domain(dev, nr_opp, em_cb, NULL);
+ } else {
+ ret = dev_pm_opp_of_register_em(dev, NULL);
+ }
+
+ if (ret)
+ dev_warn(dev, "Unable to register EM for devfreq cooling device (%d)\n",
+ ret);
+
+ if (dev->of_node)
+ np = of_node_get(dev->of_node);
+
+ cdev = of_devfreq_cooling_register_power(np, df, dfc_power);
+
+ if (np)
+ of_node_put(np);
+
+ if (IS_ERR_OR_NULL(cdev)) {
+ if (!ret)
+ em_dev_unregister_perf_domain(dev);
+ } else {
+ dfc = cdev->devdata;
+ dfc->em_registered = !ret;
+ }
+
+ return cdev;
+}
+EXPORT_SYMBOL_GPL(devfreq_cooling_em_register_power);
+
+/**
+ * devfreq_cooling_em_register() - Register devfreq cooling device together
+ * with Energy Model.
+ * @df: Pointer to devfreq device.
+ * @em_cb: Callback functions providing the data of the Energy Model
+ *
+ * This function attempts to register Energy Model for devfreq device and then
+ * register the devfreq cooling device.
+ */
+struct thermal_cooling_device *
+devfreq_cooling_em_register(struct devfreq *df, struct em_data_callback *em_cb)
+{
+ return devfreq_cooling_em_register_power(df, NULL, em_cb);
+}
+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);
+
+ if (dfc->em_registered)
+ 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 79a6e37a1d6f..07df019fcb66 100644
--- a/include/linux/devfreq_cooling.h
+++ b/include/linux/devfreq_cooling.h
@@ -18,6 +18,7 @@
#define __DEVFREQ_COOLING_H__
#include <linux/devfreq.h>
+#include <linux/energy_model.h>
#include <linux/thermal.h>
@@ -72,6 +73,13 @@ 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_power(struct devfreq *df,
+ struct devfreq_cooling_power *dfc_power,
+ struct em_data_callback *em_cb);
+struct thermal_cooling_device *
+devfreq_cooling_em_register(struct devfreq *df,
+ struct em_data_callback *em_cb);
#else /* !CONFIG_DEVFREQ_THERMAL */
@@ -94,6 +102,20 @@ devfreq_cooling_register(struct devfreq *df)
return ERR_PTR(-EINVAL);
}
+static inline struct thermal_cooling_device *
+devfreq_cooling_em_register_power(struct devfreq *df,
+ struct devfreq_cooling_power *dfc_power,
+ struct em_data_callback *em_cb)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline struct thermal_cooling_device *
+devfreq_cooling_em_register(struct devfreq *df, struct em_data_callback *em_cb)
+{
+ return ERR_PTR(-EINVAL);
+}
+
static inline void
devfreq_cooling_unregister(struct thermal_cooling_device *dfc)
{
--
2.17.1
next prev parent reply other threads:[~2020-05-11 11:21 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-11 11:18 [PATCH v7 00/15] Add support for devices in the Energy Model Lukasz Luba
2020-05-11 11:18 ` [PATCH v7 01/15] PM / EM: change naming convention from 'capacity' to 'performance' Lukasz Luba
2020-05-11 11:46 ` Quentin Perret
2020-05-11 11:18 ` [PATCH v7 02/15] PM / EM: introduce em_dev_register_perf_domain function Lukasz Luba
2020-05-11 11:51 ` Quentin Perret
2020-05-11 11:19 ` [PATCH v7 03/15] PM / EM: update callback structure and add device pointer Lukasz Luba
2020-05-11 11:57 ` Quentin Perret
2020-05-12 11:11 ` Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 04/15] PM / EM: add support for other devices than CPUs in Energy Model Lukasz Luba
2020-05-11 13:43 ` Quentin Perret
2020-05-12 11:38 ` Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 05/15] PM / EM: remove em_register_perf_domain Lukasz Luba
2020-05-11 13:44 ` Quentin Perret
2020-05-11 11:19 ` [PATCH v7 06/15] PM / EM: change name of em_pd_energy to em_cpu_energy Lukasz Luba
2020-05-11 13:45 ` Quentin Perret
2020-05-11 11:19 ` [PATCH v7 07/15] Documentation: power: update Energy Model description Lukasz Luba
2020-05-11 13:48 ` Quentin Perret
2020-05-11 11:19 ` [PATCH v7 08/15] OPP: refactor dev_pm_opp_of_register_em() and update related drivers Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 09/15] thermal: devfreq_cooling: change tracing function and arguments Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 10/15] thermal: devfreq_cooling: get device load and frequency directly Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 11/15] thermal: devfreq_cooling: work on a copy of device status Lukasz Luba
2020-05-11 11:19 ` Lukasz Luba [this message]
2020-05-11 11:19 ` [PATCH v7 13/15] thermal: devfreq_cooling: remove old power model and use EM Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 14/15] thermal: devfreq_cooling: update license to use SPDX Lukasz Luba
2020-05-11 11:19 ` [PATCH v7 15/15] drm/panfrost: Register devfreq cooling and attempt to add Energy Model Lukasz Luba
2020-05-22 10:43 ` [PATCH v7 00/15] Add support for devices in the " Daniel Lezcano
2020-05-22 12:58 ` Lukasz Luba
2020-05-22 13:01 ` Daniel Lezcano
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