diff options
Diffstat (limited to 'drivers/gpu/mali400/r3p2/mali/common/mali_kernel_utilization.c')
| -rw-r--r-- | drivers/gpu/mali400/r3p2/mali/common/mali_kernel_utilization.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_utilization.c b/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_utilization.c new file mode 100644 index 0000000..9dae2e8 --- /dev/null +++ b/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_utilization.c @@ -0,0 +1,420 @@ +/* + * 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_osk_mali.h" +#include "mali_kernel_common.h" + +/* Define how often to calculate and report GPU utilization, in milliseconds */ +static _mali_osk_lock_t *time_data_lock; + +static u32 num_running_gp_cores; +static u32 num_running_pp_cores; + +static u64 work_start_time_gpu = 0; +static u64 work_start_time_gp = 0; +static u64 work_start_time_pp = 0; +static u64 accumulated_work_time_gpu = 0; +static u64 accumulated_work_time_gp = 0; +static u64 accumulated_work_time_pp = 0; + +static u64 period_start_time = 0; + +#ifndef CONFIG_PM_DEVFREQ /* MALI_SEC */ +static _mali_osk_timer_t *utilization_timer = NULL; +#endif +static mali_bool timer_running = MALI_FALSE; + +static u32 last_utilization_gpu = 0 ; +static u32 last_utilization_gp = 0 ; +static u32 last_utilization_pp = 0 ; + +#ifndef CONFIG_PM_DEVFREQ /* MALI_SEC */ +static u32 mali_utilization_timeout = 100; +#endif +void (*mali_utilization_callback)(struct mali_gpu_utilization_data *data) = NULL; + +#ifndef CONFIG_PM_DEVFREQ +static void calculate_gpu_utilization(void* arg) +{ +#else +void calculate_gpu_utilization(void *arg) +{ +#endif + u64 time_now; + u64 time_period; + u32 leading_zeroes; + u32 shift_val; + u32 work_normalized_gpu; + u32 work_normalized_gp; + u32 work_normalized_pp; + u32 period_normalized; + u32 utilization_gpu; + u32 utilization_gp; + u32 utilization_pp; + + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + if (accumulated_work_time_gpu == 0 && work_start_time_gpu == 0) + { + /* + * No work done for this period + * - No need to reschedule timer + * - Report zero usage + */ + timer_running = MALI_FALSE; + + last_utilization_gpu = 0; + last_utilization_gp = 0; + last_utilization_pp = 0; + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + if (NULL != mali_utilization_callback) + { + struct mali_gpu_utilization_data data = { 0, }; + mali_utilization_callback(&data); + } + + 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_gpu != 0) + { + accumulated_work_time_gpu += (time_now - work_start_time_gpu); + work_start_time_gpu = time_now; + + /* GP and/or PP will also be busy if the GPU is busy at this point */ + + if (work_start_time_gp != 0) + { + accumulated_work_time_gp += (time_now - work_start_time_gp); + work_start_time_gp = time_now; + } + + if (work_start_time_pp != 0) + { + accumulated_work_time_pp += (time_now - work_start_time_pp); + work_start_time_pp = 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_gpu = (u32)(accumulated_work_time_gpu >> shift_val); + work_normalized_gp = (u32)(accumulated_work_time_gp >> shift_val); + work_normalized_pp = (u32)(accumulated_work_time_pp >> 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_gpu <<= 8; + work_normalized_gp <<= 8; + work_normalized_pp <<= 8; + } + + utilization_gpu = work_normalized_gpu / period_normalized; + utilization_gp = work_normalized_gp / period_normalized; + utilization_pp = work_normalized_pp / period_normalized; + + last_utilization_gpu = utilization_gpu; + last_utilization_gp = utilization_gp; + last_utilization_pp = utilization_pp; + + /* starting a new period */ + accumulated_work_time_gpu = 0; + accumulated_work_time_gp = 0; + accumulated_work_time_pp = 0; + period_start_time = time_now; + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + +#ifndef CONFIG_PM_DEVFREQ + _mali_osk_timer_add(utilization_timer, _mali_osk_time_mstoticks(mali_utilization_timeout)); +#endif + + if (NULL != mali_utilization_callback) + { + struct mali_gpu_utilization_data data = { utilization_gpu, utilization_gp, utilization_pp }; + mali_utilization_callback(&data); + } +} + +_mali_osk_errcode_t mali_utilization_init(void) +{ +#if USING_GPU_UTILIZATION + struct _mali_osk_device_data data; + if (_MALI_OSK_ERR_OK == _mali_osk_device_data_get(&data)) + { + /* Use device specific settings (if defined) */ +#ifndef CONFIG_PM_DEVFREQ + if (0 != data.utilization_interval) + { + mali_utilization_timeout = data.utilization_interval; + } +#endif + if (NULL != data.utilization_callback) + { + mali_utilization_callback = data.utilization_callback; + } + } +#endif + + if (NULL != mali_utilization_callback) + { +#ifndef CONFIG_PM_DEVFREQ + MALI_DEBUG_PRINT(2, ("Mali GPU Utilization: Utilization handler installed with interval %u\n", mali_utilization_timeout)); +#endif + } + else + { + MALI_DEBUG_PRINT(2, ("Mali GPU Utilization: No utilization handler installed\n")); + } + + 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; + } + + num_running_gp_cores = 0; + num_running_pp_cores = 0; + +#ifndef CONFIG_PM_DEVFREQ + 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); +#endif + + return _MALI_OSK_ERR_OK; +} + +#ifndef CONFIG_PM_DEVFREQ +void mali_utilization_suspend(void) +{ + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + if (timer_running == MALI_TRUE) + { + timer_running = MALI_FALSE; + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + _mali_osk_timer_del(utilization_timer); + return; + } + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); +} +#endif + +void mali_utilization_term(void) +{ +#ifndef CONFIG_PM_DEVFREQ + if (NULL != utilization_timer) + { + _mali_osk_timer_del(utilization_timer); + timer_running = MALI_FALSE; + _mali_osk_timer_term(utilization_timer); + utilization_timer = NULL; + } +#endif + + _mali_osk_lock_term(time_data_lock); +} + +void mali_utilization_gp_start(void) +{ + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + ++num_running_gp_cores; + if (1 == num_running_gp_cores) + { + u64 time_now = _mali_osk_time_get_ns(); + + /* First GP core started, consider GP busy from now and onwards */ + work_start_time_gp = time_now; + + if (0 == num_running_pp_cores) + { + /* + * There are no PP cores running, so this is also the point + * at which we consider the GPU to be busy as well. + */ + work_start_time_gpu = time_now; + } + + /* Start a new period (and timer) if needed */ + if (timer_running != MALI_TRUE) + { + timer_running = MALI_TRUE; + period_start_time = time_now; + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + _mali_osk_timer_add(utilization_timer, _mali_osk_time_mstoticks(mali_utilization_timeout)); + } + else + { + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + } + } + else + { + /* Nothing to do */ + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + } +} + +void mali_utilization_pp_start(void) +{ + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + ++num_running_pp_cores; + if (1 == num_running_pp_cores) + { + u64 time_now = _mali_osk_time_get_ns(); + + /* First PP core started, consider PP busy from now and onwards */ + work_start_time_pp = time_now; + + if (0 == num_running_gp_cores) + { + /* + * There are no GP cores running, so this is also the point + * at which we consider the GPU to be busy as well. + */ + work_start_time_gpu = time_now; + } + + /* Start a new period (and timer) if needed */ + if (timer_running != MALI_TRUE) + { + timer_running = MALI_TRUE; + period_start_time = time_now; + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); +#ifndef CONFIG_PM_DEVFREQ + _mali_osk_timer_add(utilization_timer, _mali_osk_time_mstoticks(mali_utilization_timeout)); +#endif + } + else + { + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + } + } + else + { + /* Nothing to do */ + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); + } +} + +void mali_utilization_gp_end(void) +{ + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + --num_running_gp_cores; + if (0 == num_running_gp_cores) + { + u64 time_now = _mali_osk_time_get_ns(); + + /* Last GP core ended, consider GP idle from now and onwards */ + accumulated_work_time_gp += (time_now - work_start_time_gp); + work_start_time_gp = 0; + + if (0 == num_running_pp_cores) + { + /* + * There are no PP cores running, so this is also the point + * at which we consider the GPU to be idle as well. + */ + accumulated_work_time_gpu += (time_now - work_start_time_gpu); + work_start_time_gpu = 0; + } + } + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); +} + +void mali_utilization_pp_end(void) +{ + _mali_osk_lock_wait(time_data_lock, _MALI_OSK_LOCKMODE_RW); + + --num_running_pp_cores; + if (0 == num_running_pp_cores) + { + u64 time_now = _mali_osk_time_get_ns(); + + /* Last PP core ended, consider PP idle from now and onwards */ + accumulated_work_time_pp += (time_now - work_start_time_pp); + work_start_time_pp = 0; + + if (0 == num_running_gp_cores) + { + /* + * There are no GP cores running, so this is also the point + * at which we consider the GPU to be idle as well. + */ + accumulated_work_time_gpu += (time_now - work_start_time_gpu); + work_start_time_gpu = 0; + } + } + + _mali_osk_lock_signal(time_data_lock, _MALI_OSK_LOCKMODE_RW); +} + +u32 _mali_ukk_utilization_gp_pp(void) +{ + return last_utilization_gpu; +} + +u32 _mali_ukk_utilization_gp(void) +{ + return last_utilization_gp; +} + +u32 _mali_ukk_utilization_pp(void) +{ + return last_utilization_pp; +} |