You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
4.0 KiB
127 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
/*
|
|
*
|
|
* (C) COPYRIGHT 2014, 2018-2021, 2023 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef _KBASE_BACKEND_TIME_H_
|
|
#define _KBASE_BACKEND_TIME_H_
|
|
|
|
#if MALI_USE_CSF
|
|
/**
|
|
* struct kbase_backend_time - System timestamp attributes.
|
|
*
|
|
* @multiplier: Numerator of the converter's fraction.
|
|
* @divisor: Denominator of the converter's fraction.
|
|
* @offset: Converter's offset term.
|
|
*
|
|
* According to Generic timer spec, system timer:
|
|
* - Increments at a fixed frequency
|
|
* - Starts operating from zero
|
|
*
|
|
* Hence CPU time is a linear function of System Time.
|
|
*
|
|
* CPU_ts = alpha * SYS_ts + beta
|
|
*
|
|
* Where
|
|
* - alpha = 10^9/SYS_ts_freq
|
|
* - beta is calculated by two timer samples taken at the same time:
|
|
* beta = CPU_ts_s - SYS_ts_s * alpha
|
|
*
|
|
* Since alpha is a rational number, we minimizing possible
|
|
* rounding error by simplifying the ratio. Thus alpha is stored
|
|
* as a simple `multiplier / divisor` ratio.
|
|
*
|
|
*/
|
|
struct kbase_backend_time {
|
|
u64 multiplier;
|
|
u64 divisor;
|
|
s64 offset;
|
|
};
|
|
|
|
/**
|
|
* kbase_backend_time_convert_gpu_to_cpu() - Convert GPU timestamp to CPU timestamp.
|
|
*
|
|
* @kbdev: Kbase device pointer
|
|
* @gpu_ts: System timestamp value to converter.
|
|
*
|
|
* Return: The CPU timestamp.
|
|
*/
|
|
u64 __maybe_unused kbase_backend_time_convert_gpu_to_cpu(struct kbase_device *kbdev, u64 gpu_ts);
|
|
#endif
|
|
|
|
/**
|
|
* kbase_backend_get_gpu_time() - Get current GPU time
|
|
* @kbdev: Device pointer
|
|
* @cycle_counter: Pointer to u64 to store cycle counter in.
|
|
* @system_time: Pointer to u64 to store system time in
|
|
* @ts: Pointer to struct timespec to store current monotonic
|
|
* time in
|
|
*/
|
|
void kbase_backend_get_gpu_time(struct kbase_device *kbdev, u64 *cycle_counter,
|
|
u64 *system_time, struct timespec64 *ts);
|
|
|
|
/**
|
|
* kbase_backend_get_gpu_time_norequest() - Get current GPU time without
|
|
* request/release cycle counter
|
|
* @kbdev: Device pointer
|
|
* @cycle_counter: Pointer to u64 to store cycle counter in
|
|
* @system_time: Pointer to u64 to store system time in
|
|
* @ts: Pointer to struct timespec to store current monotonic
|
|
* time in
|
|
*/
|
|
void kbase_backend_get_gpu_time_norequest(struct kbase_device *kbdev,
|
|
u64 *cycle_counter,
|
|
u64 *system_time,
|
|
struct timespec64 *ts);
|
|
/**
|
|
* kbase_get_timeout_ms - Choose a timeout value to get a timeout scaled
|
|
* GPU frequency, using a choice from
|
|
* kbase_timeout_selector.
|
|
*
|
|
* @kbdev: KBase device pointer.
|
|
* @selector: Value from kbase_scaled_timeout_selector enum.
|
|
*
|
|
* Return: Timeout in milliseconds, as an unsigned integer.
|
|
*/
|
|
unsigned int kbase_get_timeout_ms(struct kbase_device *kbdev,
|
|
enum kbase_timeout_selector selector);
|
|
|
|
/**
|
|
* kbase_backend_get_cycle_cnt - Reads the GPU cycle counter
|
|
*
|
|
* @kbdev: Instance of a GPU platform device that implements a CSF interface.
|
|
*
|
|
* Return: Snapshot of the GPU cycle count register.
|
|
*/
|
|
u64 kbase_backend_get_cycle_cnt(struct kbase_device *kbdev);
|
|
|
|
/**
|
|
* kbase_backend_time_init() - Initialize system timestamp converter.
|
|
*
|
|
* @kbdev: Kbase device pointer
|
|
*
|
|
* This function should only be called after GPU is powered-up and
|
|
* L2 cached power-up has been initiated.
|
|
*
|
|
* Return: Zero on success, error code otherwise.
|
|
*/
|
|
int kbase_backend_time_init(struct kbase_device *kbdev);
|
|
|
|
#endif /* _KBASE_BACKEND_TIME_H_ */
|