diff options
Diffstat (limited to 'drivers/media/video/samsung/mali/common/mali_kernel_utilization.c')
| -rw-r--r-- | drivers/media/video/samsung/mali/common/mali_kernel_utilization.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/drivers/media/video/samsung/mali/common/mali_kernel_utilization.c b/drivers/media/video/samsung/mali/common/mali_kernel_utilization.c deleted file mode 100644 index a374dbf..0000000 --- a/drivers/media/video/samsung/mali/common/mali_kernel_utilization.c +++ /dev/null @@ -1,218 +0,0 @@ -/* - * Copyright (C) 2010-2012 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 licence. - * - * A copy of the licence is included with the program, and can also be obtained from Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include "mali_kernel_utilization.h" -#include "mali_osk.h" -#include "mali_platform.h" - -/* Define how often to calculate and report GPU utilization, in milliseconds */ -#define MALI_GPU_UTILIZATION_TIMEOUT 1000 - -static _mali_osk_lock_t *time_data_lock; - -static _mali_osk_atomic_t num_running_cores; - -static u64 period_start_time = 0; -static u64 work_start_time = 0; -static u64 accumulated_work_time = 0; - -static _mali_osk_timer_t *utilization_timer = NULL; -static mali_bool timer_running = MALI_FALSE; - - -static void calculate_gpu_utilization(void* arg) -{ - u64 time_now; - u64 time_period; - u32 leading_zeroes; - u32 shift_val; - u32 work_normalized; - u32 period_normalized; - u32 utilization; - - _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - if (accumulated_work_time == 0 && work_start_time == 0) - { - /* Don't reschedule timer, this will be started if new work arrives */ - timer_running = MALI_FALSE; - - _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - /* No work done for this period, report zero usage */ - mali_gpu_utilization_handler(0); - - return; - } - - time_now = _mali_osk_time_get_ns(); - time_period = time_now - period_start_time; - - /* If we are currently busy, update working period up to now */ - if (work_start_time != 0) - { - accumulated_work_time += (time_now - work_start_time); - work_start_time = time_now; - } - - /* - * We have two 64-bit values, a dividend and a divisor. - * To avoid dependencies to a 64-bit divider, we shift down the two values - * equally first. - * We shift the dividend up and possibly the divisor down, making the result X in 256. - */ - - /* Shift the 64-bit values down so they fit inside a 32-bit integer */ - leading_zeroes = _mali_osk_clz((u32)(time_period >> 32)); - shift_val = 32 - leading_zeroes; - work_normalized = (u32)(accumulated_work_time >> shift_val); - period_normalized = (u32)(time_period >> shift_val); - - /* - * Now, we should report the usage in parts of 256 - * this means we must shift up the dividend or down the divisor by 8 - * (we could do a combination, but we just use one for simplicity, - * but the end result should be good enough anyway) - */ - if (period_normalized > 0x00FFFFFF) - { - /* The divisor is so big that it is safe to shift it down */ - period_normalized >>= 8; - } - else - { - /* - * The divisor is so small that we can shift up the dividend, without loosing any data. - * (dividend is always smaller than the divisor) - */ - work_normalized <<= 8; - } - - utilization = work_normalized / period_normalized; - - accumulated_work_time = 0; - period_start_time = time_now; /* starting a new period */ - - _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - _mali_osk_timer_add(utilization_timer, _mali_osk_time_mstoticks(MALI_GPU_UTILIZATION_TIMEOUT)); - - - mali_gpu_utilization_handler(utilization); -} - -_mali_osk_errcode_t mali_utilization_init(void) -{ - time_data_lock = _mali_osk_lock_init(_MALI_OSK_LOCKFLAG_ORDERED | _MALI_OSK_LOCKFLAG_SPINLOCK_IRQ | - _MALI_OSK_LOCKFLAG_NONINTERRUPTABLE, 0, _MALI_OSK_LOCK_ORDER_UTILIZATION); - - if (NULL == time_data_lock) - { - return _MALI_OSK_ERR_FAULT; - } - - _mali_osk_atomic_init(&num_running_cores, 0); - - utilization_timer = _mali_osk_timer_init(); - if (NULL == utilization_timer) - { - _mali_osk_lock_term(time_data_lock); - return _MALI_OSK_ERR_FAULT; - } - _mali_osk_timer_setcallback(utilization_timer, calculate_gpu_utilization, NULL); - - return _MALI_OSK_ERR_OK; -} - -void mali_utilization_suspend(void) -{ - if (NULL != utilization_timer) - { - _mali_osk_timer_del(utilization_timer); - timer_running = MALI_FALSE; - } -} - -void mali_utilization_term(void) -{ - if (NULL != utilization_timer) - { - _mali_osk_timer_del(utilization_timer); - timer_running = MALI_FALSE; - _mali_osk_timer_term(utilization_timer); - utilization_timer = NULL; - } - - _mali_osk_atomic_term(&num_running_cores); - - _mali_osk_lock_term(time_data_lock); -} - -void mali_utilization_core_start(u64 time_now) -{ - if (_mali_osk_atomic_inc_return(&num_running_cores) == 1) - { - /* - * We went from zero cores working, to one core working, - * we now consider the entire GPU for being busy - */ - - _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - if (time_now < period_start_time) - { - /* - * This might happen if the calculate_gpu_utilization() was able - * to run between the sampling of time_now and us grabbing the lock above - */ - time_now = period_start_time; - } - - work_start_time = time_now; - if (timer_running != MALI_TRUE) - { - timer_running = MALI_TRUE; - period_start_time = work_start_time; /* starting a new period */ - - _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - _mali_osk_timer_add(utilization_timer, _mali_osk_time_mstoticks(MALI_GPU_UTILIZATION_TIMEOUT)); - } - else - { - _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); - } - } -} - -void mali_utilization_core_end(u64 time_now) -{ - if (_mali_osk_atomic_dec_return(&num_running_cores) == 0) - { - /* - * No more cores are working, so accumulate the time we was busy. - */ - _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); - - if (time_now < work_start_time) - { - /* - * This might happen if the calculate_gpu_utilization() was able - * to run between the sampling of time_now and us grabbing the lock above - */ - time_now = work_start_time; - } - - accumulated_work_time += (time_now - work_start_time); - work_start_time = 0; - - _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); - } -} |