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