| // 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 |
| } |