blob: d10e40426099f97130a8363f6bb7618e80b075c4 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
*
* (C) COPYRIGHT 2014-2016, 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.
*
*/
#include <mali_kbase.h>
#include <mali_kbase_hwaccess_time.h>
#include <device/mali_kbase_device.h>
#include <backend/gpu/mali_kbase_pm_internal.h>
void kbase_backend_get_gpu_time_norequest(struct kbase_device *kbdev,
u64 *cycle_counter,
u64 *system_time,
struct timespec64 *ts)
{
u32 hi1, hi2;
if (cycle_counter) {
/* Read hi, lo, hi to ensure a coherent u64 */
do {
hi1 = kbase_reg_read(kbdev,
GPU_CONTROL_REG(CYCLE_COUNT_HI));
*cycle_counter = kbase_reg_read(kbdev,
GPU_CONTROL_REG(CYCLE_COUNT_LO));
hi2 = kbase_reg_read(kbdev,
GPU_CONTROL_REG(CYCLE_COUNT_HI));
} while (hi1 != hi2);
*cycle_counter |= (((u64) hi1) << 32);
}
if (system_time) {
/* Read hi, lo, hi to ensure a coherent u64 */
do {
hi1 = kbase_reg_read(kbdev,
GPU_CONTROL_REG(TIMESTAMP_HI));
*system_time = kbase_reg_read(kbdev,
GPU_CONTROL_REG(TIMESTAMP_LO));
hi2 = kbase_reg_read(kbdev,
GPU_CONTROL_REG(TIMESTAMP_HI));
} while (hi1 != hi2);
*system_time |= (((u64) hi1) << 32);
}
/* Record the CPU's idea of current time */
if (ts != NULL)
#if (KERNEL_VERSION(4, 17, 0) > LINUX_VERSION_CODE)
*ts = ktime_to_timespec64(ktime_get_raw());
#else
ktime_get_raw_ts64(ts);
#endif
}
#if !MALI_USE_CSF
/**
* timedwait_cycle_count_active() - Timed wait till CYCLE_COUNT_ACTIVE is active
*
* @kbdev: Kbase device
*
* Return: true if CYCLE_COUNT_ACTIVE is active within the timeout.
*/
static bool timedwait_cycle_count_active(struct kbase_device *kbdev)
{
bool success = false;
const unsigned int timeout = 100;
const unsigned long remaining = jiffies + msecs_to_jiffies(timeout);
while (time_is_after_jiffies(remaining)) {
if ((kbase_reg_read(kbdev, GPU_CONTROL_REG(GPU_STATUS)) &
GPU_STATUS_CYCLE_COUNT_ACTIVE)) {
success = true;
break;
}
}
return success;
}
#endif
void kbase_backend_get_gpu_time(struct kbase_device *kbdev, u64 *cycle_counter,
u64 *system_time, struct timespec64 *ts)
{
#if !MALI_USE_CSF
kbase_pm_request_gpu_cycle_counter(kbdev);
WARN_ONCE(kbdev->pm.backend.l2_state != KBASE_L2_ON,
"L2 not powered up");
WARN_ONCE((!timedwait_cycle_count_active(kbdev)),
"Timed out on CYCLE_COUNT_ACTIVE");
#endif
kbase_backend_get_gpu_time_norequest(kbdev, cycle_counter, system_time,
ts);
#if !MALI_USE_CSF
kbase_pm_release_gpu_cycle_counter(kbdev);
#endif
}