| /** |
| * Copyright (C) 2010-2014 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. |
| */ |
| |
| /** |
| * @file mali_osk_pm.c |
| * Implementation of the callback functions from common power management |
| */ |
| |
| #include <linux/sched.h> |
| |
| #ifdef CONFIG_PM_RUNTIME |
| #include <linux/pm_runtime.h> |
| #endif /* CONFIG_PM_RUNTIME */ |
| #include <linux/platform_device.h> |
| #include <linux/version.h> |
| #include "mali_osk.h" |
| #include "mali_kernel_common.h" |
| #include "mali_kernel_linux.h" |
| |
| static _mali_osk_atomic_t mali_pm_ref_count; |
| |
| void _mali_osk_pm_dev_enable(void) |
| { |
| _mali_osk_atomic_init(&mali_pm_ref_count, 0); |
| } |
| |
| void _mali_osk_pm_dev_disable(void) |
| { |
| _mali_osk_atomic_term(&mali_pm_ref_count); |
| } |
| |
| /* Can NOT run in atomic context */ |
| _mali_osk_errcode_t _mali_osk_pm_dev_ref_add(void) |
| { |
| #ifdef CONFIG_PM_RUNTIME |
| int err; |
| MALI_DEBUG_ASSERT_POINTER(mali_platform_device); |
| err = pm_runtime_get_sync(&(mali_platform_device->dev)); |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)) |
| pm_runtime_mark_last_busy(&(mali_platform_device->dev)); |
| #endif |
| if (0 > err) { |
| MALI_PRINT_ERROR(("Mali OSK PM: pm_runtime_get_sync() returned error code %d\n", err)); |
| return _MALI_OSK_ERR_FAULT; |
| } |
| _mali_osk_atomic_inc(&mali_pm_ref_count); |
| MALI_DEBUG_PRINT(4, ("Mali OSK PM: Power ref taken (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); |
| #endif |
| return _MALI_OSK_ERR_OK; |
| } |
| |
| /* Can run in atomic context */ |
| void _mali_osk_pm_dev_ref_dec(void) |
| { |
| #ifdef CONFIG_PM_RUNTIME |
| MALI_DEBUG_ASSERT_POINTER(mali_platform_device); |
| _mali_osk_atomic_dec(&mali_pm_ref_count); |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)) |
| pm_runtime_mark_last_busy(&(mali_platform_device->dev)); |
| pm_runtime_put_autosuspend(&(mali_platform_device->dev)); |
| #else |
| pm_runtime_put(&(mali_platform_device->dev)); |
| #endif |
| MALI_DEBUG_PRINT(4, ("Mali OSK PM: Power ref released (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); |
| #endif |
| } |
| |
| /* Can run in atomic context */ |
| mali_bool _mali_osk_pm_dev_ref_add_no_power_on(void) |
| { |
| #ifdef CONFIG_PM_RUNTIME |
| u32 ref; |
| MALI_DEBUG_ASSERT_POINTER(mali_platform_device); |
| pm_runtime_get_noresume(&(mali_platform_device->dev)); |
| ref = _mali_osk_atomic_read(&mali_pm_ref_count); |
| MALI_DEBUG_PRINT(4, ("Mali OSK PM: No-power ref taken (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); |
| return ref > 0 ? MALI_TRUE : MALI_FALSE; |
| #else |
| return MALI_TRUE; |
| #endif |
| } |
| |
| /* Can run in atomic context */ |
| void _mali_osk_pm_dev_ref_dec_no_power_on(void) |
| { |
| #ifdef CONFIG_PM_RUNTIME |
| MALI_DEBUG_ASSERT_POINTER(mali_platform_device); |
| #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)) |
| pm_runtime_put_autosuspend(&(mali_platform_device->dev)); |
| #else |
| pm_runtime_put(&(mali_platform_device->dev)); |
| #endif |
| MALI_DEBUG_PRINT(4, ("Mali OSK PM: No-power ref released (%u)\n", _mali_osk_atomic_read(&mali_pm_ref_count))); |
| #endif |
| } |
| |
| void _mali_osk_pm_dev_barrier(void) |
| { |
| #ifdef CONFIG_PM_RUNTIME |
| pm_runtime_barrier(&(mali_platform_device->dev)); |
| #endif |
| } |