/*
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*
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* (C) COPYRIGHT 2017 ARM Limited. All rights reserved.
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms
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* of such GNU licence.
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*
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* A copy of the licence is included with the program, and can also be obtained
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* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* A core availability policy implementing core mask selection from devfreq OPPs
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*
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*/
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#include <mali_kbase.h>
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#include <mali_kbase_pm.h>
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#include <backend/gpu/mali_kbase_pm_internal.h>
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#include <linux/version.h>
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void kbase_devfreq_set_core_mask(struct kbase_device *kbdev, u64 core_mask)
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{
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struct kbasep_pm_ca_policy_devfreq *data =
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&kbdev->pm.backend.ca_policy_data.devfreq;
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unsigned long flags;
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spin_lock_irqsave(&kbdev->hwaccess_lock, flags);
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data->cores_desired = core_mask;
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/* Disable any cores that are now unwanted */
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data->cores_enabled &= data->cores_desired;
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kbdev->pm.backend.ca_in_transition = true;
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/* If there are no cores to be powered off then power on desired cores
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*/
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if (!(data->cores_used & ~data->cores_desired)) {
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data->cores_enabled = data->cores_desired;
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kbdev->pm.backend.ca_in_transition = false;
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}
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kbase_pm_update_cores_state_nolock(kbdev);
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spin_unlock_irqrestore(&kbdev->hwaccess_lock, flags);
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dev_dbg(kbdev->dev, "Devfreq policy : new core mask=%llX %llX\n",
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data->cores_desired, data->cores_enabled);
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}
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static void devfreq_init(struct kbase_device *kbdev)
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{
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struct kbasep_pm_ca_policy_devfreq *data =
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&kbdev->pm.backend.ca_policy_data.devfreq;
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if (kbdev->current_core_mask) {
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data->cores_enabled = kbdev->current_core_mask;
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data->cores_desired = kbdev->current_core_mask;
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} else {
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data->cores_enabled =
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kbdev->gpu_props.props.raw_props.shader_present;
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data->cores_desired =
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kbdev->gpu_props.props.raw_props.shader_present;
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}
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data->cores_used = 0;
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kbdev->pm.backend.ca_in_transition = false;
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}
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static void devfreq_term(struct kbase_device *kbdev)
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{
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}
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static u64 devfreq_get_core_mask(struct kbase_device *kbdev)
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{
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return kbdev->pm.backend.ca_policy_data.devfreq.cores_enabled;
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}
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static void devfreq_update_core_status(struct kbase_device *kbdev,
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u64 cores_ready,
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u64 cores_transitioning)
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{
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struct kbasep_pm_ca_policy_devfreq *data =
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&kbdev->pm.backend.ca_policy_data.devfreq;
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lockdep_assert_held(&kbdev->hwaccess_lock);
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data->cores_used = cores_ready | cores_transitioning;
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/* If in desired state then clear transition flag */
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if (data->cores_enabled == data->cores_desired)
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kbdev->pm.backend.ca_in_transition = false;
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/* If all undesired cores are now off then power on desired cores.
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* The direct comparison against cores_enabled limits potential
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* recursion to one level */
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if (!(data->cores_used & ~data->cores_desired) &&
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data->cores_enabled != data->cores_desired) {
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data->cores_enabled = data->cores_desired;
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kbase_pm_update_cores_state_nolock(kbdev);
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kbdev->pm.backend.ca_in_transition = false;
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}
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}
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/*
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* The struct kbase_pm_ca_policy structure for the devfreq core availability
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* policy.
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*
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* This is the static structure that defines the devfreq core availability power
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* policy's callback and name.
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*/
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const struct kbase_pm_ca_policy kbase_pm_ca_devfreq_policy_ops = {
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"devfreq", /* name */
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devfreq_init, /* init */
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devfreq_term, /* term */
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devfreq_get_core_mask, /* get_core_mask */
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devfreq_update_core_status, /* update_core_status */
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0u, /* flags */
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KBASE_PM_CA_POLICY_ID_DEVFREQ, /* id */
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};
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