| /* |
| * Copyright (c) 2013-2014 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| * |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| |
| #ifndef _ADF_CMN_OS_LOCK_PVT_H |
| #define _ADF_CMN_OS_LOCK_PVT_H |
| |
| #include <linux/semaphore.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <adf_os_types.h> |
| |
| typedef struct __adf_os_linux_spinlock { |
| spinlock_t spinlock; |
| unsigned int flags; |
| unsigned long _flags; |
| } adf_os_linux_spinlock_t; |
| |
| /* define for flag */ |
| #define ADF_OS_LINUX_UNLOCK_BH 1 |
| |
| typedef adf_os_linux_spinlock_t __adf_os_spinlock_t; |
| typedef struct semaphore __adf_os_mutex_t; |
| |
| /** |
| * @brief Initialize the mutex |
| * |
| * @param mutex |
| * |
| * @return |
| */ |
| static inline a_status_t |
| __adf_os_init_mutex(struct semaphore *m) |
| { |
| sema_init(m, 1); |
| return A_STATUS_OK; |
| } |
| |
| |
| |
| |
| static inline int |
| __adf_os_mutex_acquire(adf_os_device_t osdev, struct semaphore *m) |
| { |
| down(m); |
| return 0; |
| } |
| |
| static inline int |
| __adf_os_mutex_acquire_timeout(adf_os_device_t osdev, struct semaphore *m, long timeout) |
| { |
| return down_timeout(m, timeout); |
| } |
| |
| static inline void |
| __adf_os_mutex_release(adf_os_device_t osdev, struct semaphore *m) |
| { |
| up(m); |
| } |
| |
| static inline a_status_t |
| __adf_os_spinlock_init(__adf_os_spinlock_t *lock) |
| { |
| spin_lock_init(&lock->spinlock); |
| lock->flags = 0; |
| |
| return A_STATUS_OK; |
| } |
| |
| #define __adf_os_spinlock_destroy(lock) |
| /** |
| * @brief Acquire a Spinlock (SMP) & disable Preemption (Preemptive) |
| * |
| * @param lock (Lock object) |
| * @param flags (Current IRQ mask) |
| */ |
| static inline void |
| __adf_os_spin_lock(__adf_os_spinlock_t *lock) |
| { |
| spin_lock(&lock->spinlock); |
| } |
| |
| /** |
| * @brief Unlock the spinlock and enables the Preemption |
| * |
| * @param lock |
| * @param flags |
| */ |
| static inline void |
| __adf_os_spin_unlock(__adf_os_spinlock_t *lock) |
| { |
| spin_unlock(&lock->spinlock); |
| } |
| |
| /** |
| * @brief Acquire a Spinlock (SMP) & disable Preemption (Preemptive) |
| * Disable IRQs |
| * @param lock (Lock object) |
| */ |
| static inline void |
| __adf_os_spin_lock_irqsave(__adf_os_spinlock_t *lock) |
| { |
| spin_lock_irqsave(&lock->spinlock, lock->_flags); |
| } |
| |
| /** |
| * @brief Unlock the spinlock and enables the Preemption |
| * Enable IRQ |
| * @param lock (Lock object) |
| */ |
| static inline void |
| __adf_os_spin_unlock_irqrestore(__adf_os_spinlock_t *lock) |
| { |
| spin_unlock_irqrestore(&lock->spinlock, lock->_flags); |
| } |
| |
| /** |
| * @brief Acquire the spinlock and disable bottom halves |
| * |
| * @param lock |
| */ |
| |
| /* |
| * Synchronous versions - only for OS' that have interrupt disable |
| */ |
| #define __adf_os_spin_lock_irq(_pLock, _flags) spin_lock_irqsave(_pLock, _flags) |
| #define __adf_os_spin_unlock_irq(_pLock, _flags) spin_unlock_irqrestore(_pLock, _flags) |
| |
| static inline void |
| __adf_os_spin_lock_bh(__adf_os_spinlock_t *lock) |
| { |
| if (likely(irqs_disabled() || in_softirq())) { |
| spin_lock(&lock->spinlock); |
| } else { |
| spin_lock_bh(&lock->spinlock); |
| lock->flags |= ADF_OS_LINUX_UNLOCK_BH; |
| } |
| |
| } |
| static inline void |
| __adf_os_spin_unlock_bh(__adf_os_spinlock_t *lock) |
| { |
| if (unlikely(lock->flags & ADF_OS_LINUX_UNLOCK_BH)) { |
| lock->flags &= ~ADF_OS_LINUX_UNLOCK_BH; |
| spin_unlock_bh(&lock->spinlock); |
| } else |
| spin_unlock(&lock->spinlock); |
| } |
| |
| static inline a_bool_t |
| __adf_os_spinlock_irq_exec(adf_os_handle_t hdl, |
| __adf_os_spinlock_t *lock, |
| adf_os_irqlocked_func_t func, |
| void *arg) |
| { |
| unsigned long flags; |
| a_bool_t ret; |
| |
| spin_lock_irqsave(&lock->spinlock, flags); |
| ret = func(arg); |
| spin_unlock_irqrestore(&lock->spinlock, flags); |
| |
| return ret; |
| } |
| |
| |
| static inline a_bool_t |
| __adf_os_in_softirq(void) |
| { |
| return (in_softirq()); |
| } |
| #endif /*_ADF_CMN_OS_LOCK_PVT_H*/ |