/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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*
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* (C) COPYRIGHT 2010-2015, 2018-2021 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 license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*
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*/
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/*
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* Power policy API definitions
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*/
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#ifndef _KBASE_PM_POLICY_H_
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#define _KBASE_PM_POLICY_H_
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/**
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* kbase_pm_policy_init - Initialize power policy framework
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*
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* @kbdev: The kbase device structure for the device (must be a valid pointer)
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*
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* Must be called before calling any other policy function
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*/
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void kbase_pm_policy_init(struct kbase_device *kbdev);
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/**
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* kbase_pm_policy_term - Terminate power policy framework
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*
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* @kbdev: The kbase device structure for the device (must be a valid pointer)
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*/
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void kbase_pm_policy_term(struct kbase_device *kbdev);
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/**
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* kbase_pm_update_active - Update the active power state of the GPU
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*
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* @kbdev: The kbase device structure for the device (must be a valid pointer)
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*
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* Calls into the current power policy
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*/
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void kbase_pm_update_active(struct kbase_device *kbdev);
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/**
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* kbase_pm_update_cores - Update the desired core state of the GPU
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*
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* @kbdev: The kbase device structure for the device (must be a valid pointer)
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*
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* Calls into the current power policy
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*/
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void kbase_pm_update_cores(struct kbase_device *kbdev);
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/**
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* kbase_pm_cores_requested - Check that a power request has been locked into
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* the HW.
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* @kbdev: Kbase device
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* @shader_required: true if shaders are required
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*
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* Called by the scheduler to check if a power on request has been locked into
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* the HW.
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*
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* Note that there is no guarantee that the cores are actually ready, however
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* when the request has been locked into the HW, then it is safe to submit work
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* since the HW will wait for the transition to ready.
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*
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* A reference must first be taken prior to making this call.
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*
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* Caller must hold the hwaccess_lock.
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*
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* Return: true if the request to the HW was successfully made else false if the
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* request is still pending.
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*/
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static inline bool kbase_pm_cores_requested(struct kbase_device *kbdev,
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bool shader_required)
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{
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lockdep_assert_held(&kbdev->hwaccess_lock);
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/* If the L2 & tiler are not on or pending, then the tiler is not yet
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* available, and shaders are definitely not powered.
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*/
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if (kbdev->pm.backend.l2_state != KBASE_L2_PEND_ON &&
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kbdev->pm.backend.l2_state != KBASE_L2_ON &&
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kbdev->pm.backend.l2_state != KBASE_L2_ON_HWCNT_ENABLE)
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return false;
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if (shader_required &&
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kbdev->pm.backend.shaders_state != KBASE_SHADERS_PEND_ON_CORESTACK_ON &&
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kbdev->pm.backend.shaders_state != KBASE_SHADERS_ON_CORESTACK_ON &&
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kbdev->pm.backend.shaders_state != KBASE_SHADERS_ON_CORESTACK_ON_RECHECK)
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return false;
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return true;
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}
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#endif /* _KBASE_PM_POLICY_H_ */
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