include/linux/hwspinlock.h

4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
6  * Contact: Ohad Ben-Cohen <ohad@wizery.com>
34  * struct hwspinlock_pdata - platform data for hwspinlock drivers
37  * hwspinlock devices provide system-wide hardware locks that are used
40  * To achieve that, each physical lock must have a system-wide id number
46  * (num-of-locks - 1).
87  * Note: ERR_PTR(-ENODEV) will still be considered a success for NULL-checking
92 	return ERR_PTR(-ENODEV);  in hwspin_lock_request()
97 	return ERR_PTR(-ENODEV);  in hwspin_lock_request_specific()
131  * hwspin_trylock_irqsave() - try to lock an hwspinlock, disable interrupts
143  * Returns 0 if we successfully locked the hwspinlock, -EBUSY if
144  * the hwspinlock was already taken, and -EINVAL if @hwlock is invalid.
153  * hwspin_trylock_irq() - try to lock an hwspinlock, disable interrupts
163  * Returns 0 if we successfully locked the hwspinlock, -EBUSY if
164  * the hwspinlock was already taken, and -EINVAL if @hwlock is invalid.
172  * hwspin_trylock() - attempt to lock a specific hwspinlock
181  * polling on the hardware interconnect.
183  * Returns 0 if we successfully locked the hwspinlock, -EBUSY if
184  * the hwspinlock was already taken, and -EINVAL if @hwlock is invalid.
192  * hwspin_lock_timeout_irqsave() - lock hwspinlock, with timeout, disable irqs
206  * error code otherwise (most notably an -ETIMEDOUT if the @hwlock is still
216  * hwspin_lock_timeout_irq() - lock hwspinlock, with timeout, disable irqs
229  * error code otherwise (most notably an -ETIMEDOUT if the @hwlock is still
239  * hwspin_lock_timeout() - lock an hwspinlock with timeout limit
251  * hardware interconnect.
254  * error code otherwise (most notably an -ETIMEDOUT if the @hwlock is still
264  * hwspin_unlock_irqrestore() - unlock hwspinlock, restore irq state
265  * @hwlock: a previously-acquired hwspinlock which we want to unlock
282  * hwspin_unlock_irq() - unlock hwspinlock, enable interrupts
283  * @hwlock: a previously-acquired hwspinlock which we want to unlock
298  * hwspin_unlock() - unlock hwspinlock
299  * @hwlock: a previously-acquired hwspinlock which we want to unlock