112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* (C) COPYRIGHT 2021 Samsung Electronics Inc. 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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* 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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#ifndef _MALI_EXYNOS_QOS_H_
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#define _MALI_EXYNOS_QOS_H_
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#include <linux/device.h>
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/**
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* enum gpex_qos_flag - flags used as input to gpex_qos_set
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* @QOS_MIN : affect min lock
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* @QOS_MAX : affect max lock
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* @QOS_LITTLE : affect little cpu cluster
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* @QOS_MIDDLE : affect middle cpu cluster
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* @QOS_BIG : affect big cpu cluster
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* @QOS_MIF : affect mif
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*
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* These flags are used to set which IP to affect and how to affect the said IP for QOS requests.
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*/
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typedef enum {
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QOS_MIN = 1 << 0,
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QOS_MAX = 1 << 1,
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QOS_LITTLE = 1 << 2,
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QOS_MIDDLE = 1 << 3,
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QOS_BIG = 1 << 4,
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QOS_MIF = 1 << 5,
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} gpex_qos_flag;
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/**
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* gpex_qos_init() - Initialize QOS module
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*
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* Return: 0 on success
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*/
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int gpex_qos_init(void);
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/**
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* gpex_qos_term() - Terminate QOS module to initial state
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*/
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void gpex_qos_term(void);
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/**
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* gpex_qos_set() - request PMQOS of other IPs
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*
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* @flags: bit vector flags stating what PMQOS operation to request (which IP, min/max lock etc)
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* @val: value used for PMQOS operation. Most likely the frequency to set the other IP to.
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*
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* Request MIN or MAX lock on other IPs. Depending on the SOC, the call may be ignored.
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* For example, requesting a MIN lock on BIG cpu cluster on SOCs with no BIG cluster will
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* be ignored.
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*
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* Return: 0 on success
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*/
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int gpex_qos_set(gpex_qos_flag flags, int val);
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/**
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* gpex_qos_unset() - unset PMQOS of other IPs
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*
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* @flags: bit vector flags stating which IP and lock to unset
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*
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* Unset the QOS locks of given IP as indicated in @flags. The call will be ignored if the IP
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* does not exist QOS was not set in the first place.
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*
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* Return: 0 on success
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*/
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int gpex_qos_unset(gpex_qos_flag flags);
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/**
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* gpex_qos_set_from_clock() - set PMQOS depending on given gpu clock
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*
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* @clk: gpu clock to get the values for PMQOS
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*
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* Set memory min clock, cpu min clock etc depending on the given gpu clock.
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* The target PMQOS clocks are derived frome a lookup table with gpu clock as the
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* key.
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*
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* Return: 0 on success.
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*/
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int gpex_qos_set_from_clock(int clk);
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/**
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* gpex_qos_set_bts_mo() - set or unset BTS MO depending on given gpu_clock
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*
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* @gpu_clock: clock the gpu will be set to or have been set to.
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* This value will be used to determine if BTS MO should be set or unset
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*
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* Determine whether the GPU should hold high priority in BTS MO depending on the given
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* @gpu_clock. The minimum frequency at which BTS MO for GPU is set in devicetree as
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* "gpu_mo_min_clock"
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*
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* Return: 0 on success
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*/
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int gpex_qos_set_bts_mo(int gpu_clock);
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#endif /* _MALI_EXYNOS_QOS_H_ */
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