| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| /* |
| * |
| * (C) COPYRIGHT 2010-2015, 2018-2021 ARM Limited. All rights reserved. |
| * |
| * This program is free software and is provided to you under the terms of the |
| * GNU General Public License version 2 as published by the Free Software |
| * Foundation, and any use by you of this program is subject to the terms |
| * of such GNU license. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, you can access it online at |
| * http://www.gnu.org/licenses/gpl-2.0.html. |
| * |
| */ |
| |
| /* |
| * Power policy API definitions |
| */ |
| |
| #ifndef _KBASE_PM_POLICY_H_ |
| #define _KBASE_PM_POLICY_H_ |
| |
| /** |
| * kbase_pm_policy_init - Initialize power policy framework |
| * |
| * @kbdev: The kbase device structure for the device (must be a valid pointer) |
| * |
| * Must be called before calling any other policy function |
| */ |
| void kbase_pm_policy_init(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_pm_policy_term - Terminate power policy framework |
| * |
| * @kbdev: The kbase device structure for the device (must be a valid pointer) |
| */ |
| void kbase_pm_policy_term(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_pm_update_active - Update the active power state of the GPU |
| * |
| * @kbdev: The kbase device structure for the device (must be a valid pointer) |
| * |
| * Calls into the current power policy |
| */ |
| void kbase_pm_update_active(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_pm_update_cores - Update the desired core state of the GPU |
| * |
| * @kbdev: The kbase device structure for the device (must be a valid pointer) |
| * |
| * Calls into the current power policy |
| */ |
| void kbase_pm_update_cores(struct kbase_device *kbdev); |
| |
| /** |
| * kbase_pm_cores_requested - Check that a power request has been locked into |
| * the HW. |
| * @kbdev: Kbase device |
| * @shader_required: true if shaders are required |
| * |
| * Called by the scheduler to check if a power on request has been locked into |
| * the HW. |
| * |
| * Note that there is no guarantee that the cores are actually ready, however |
| * when the request has been locked into the HW, then it is safe to submit work |
| * since the HW will wait for the transition to ready. |
| * |
| * A reference must first be taken prior to making this call. |
| * |
| * Caller must hold the hwaccess_lock. |
| * |
| * Return: true if the request to the HW was successfully made else false if the |
| * request is still pending. |
| */ |
| static inline bool kbase_pm_cores_requested(struct kbase_device *kbdev, |
| bool shader_required) |
| { |
| lockdep_assert_held(&kbdev->hwaccess_lock); |
| |
| /* If the L2 & tiler are not on or pending, then the tiler is not yet |
| * available, and shaders are definitely not powered. |
| */ |
| if (kbdev->pm.backend.l2_state != KBASE_L2_PEND_ON && |
| kbdev->pm.backend.l2_state != KBASE_L2_ON && |
| kbdev->pm.backend.l2_state != KBASE_L2_ON_HWCNT_ENABLE) |
| return false; |
| |
| if (shader_required && |
| kbdev->pm.backend.shaders_state != KBASE_SHADERS_PEND_ON_CORESTACK_ON && |
| kbdev->pm.backend.shaders_state != KBASE_SHADERS_ON_CORESTACK_ON && |
| kbdev->pm.backend.shaders_state != KBASE_SHADERS_ON_CORESTACK_ON_RECHECK) |
| return false; |
| |
| return true; |
| } |
| |
| #endif /* _KBASE_PM_POLICY_H_ */ |