| /* |
| * Copyright (C) 2013, 2016 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_spinlock_reentrant.h" |
| |
| #include "mali_osk.h" |
| #include "mali_kernel_common.h" |
| |
| struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order) |
| { |
| struct mali_spinlock_reentrant *spinlock; |
| |
| spinlock = _mali_osk_calloc(1, sizeof(struct mali_spinlock_reentrant)); |
| if (NULL == spinlock) { |
| return NULL; |
| } |
| |
| spinlock->lock = _mali_osk_spinlock_irq_init(_MALI_OSK_LOCKFLAG_ORDERED, lock_order); |
| if (NULL == spinlock->lock) { |
| mali_spinlock_reentrant_term(spinlock); |
| return NULL; |
| } |
| |
| return spinlock; |
| } |
| |
| void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock) |
| { |
| MALI_DEBUG_ASSERT_POINTER(spinlock); |
| MALI_DEBUG_ASSERT(0 == spinlock->counter && 0 == spinlock->owner); |
| |
| if (NULL != spinlock->lock) { |
| _mali_osk_spinlock_irq_term(spinlock->lock); |
| } |
| |
| _mali_osk_free(spinlock); |
| } |
| |
| void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid) |
| { |
| MALI_DEBUG_ASSERT_POINTER(spinlock); |
| MALI_DEBUG_ASSERT_POINTER(spinlock->lock); |
| MALI_DEBUG_ASSERT(0 != tid); |
| |
| MALI_DEBUG_PRINT(5, ("%s ^\n", __FUNCTION__)); |
| |
| if (tid != spinlock->owner) { |
| _mali_osk_spinlock_irq_lock(spinlock->lock); |
| MALI_DEBUG_ASSERT(0 == spinlock->owner && 0 == spinlock->counter); |
| spinlock->owner = tid; |
| } |
| |
| MALI_DEBUG_PRINT(5, ("%s v\n", __FUNCTION__)); |
| |
| ++spinlock->counter; |
| } |
| |
| void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid) |
| { |
| MALI_DEBUG_ASSERT_POINTER(spinlock); |
| MALI_DEBUG_ASSERT_POINTER(spinlock->lock); |
| MALI_DEBUG_ASSERT(0 != tid && tid == spinlock->owner); |
| |
| --spinlock->counter; |
| if (0 == spinlock->counter) { |
| spinlock->owner = 0; |
| MALI_DEBUG_PRINT(5, ("%s release last\n", __FUNCTION__)); |
| _mali_osk_spinlock_irq_unlock(spinlock->lock); |
| } |
| } |