/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_SPINLOCK_H
#define __LINUX_SPINLOCK_H
#define __LINUX_INSIDE_SPINLOCK_H



#include <linux/typecheck.h>
#include <linux/preempt.h>
#include <linux/linkage.h>
#include <linux/compiler.h>
#include <linux/irqflags.h>
#include <linux/thread_info.h>
#include <linux/stringify.h>
#include <linux/bottom_half.h>
#include <linux/lockdep.h>
#include <linux/cleanup.h>
#include <asm/barrier.h>
#include <asm/mmiowb.h>



#define LOCK_SECTION_NAME ".text..lock."KBUILD_BASENAME

#define LOCK_SECTION_START(extra)               \
        ".subsection 1\n\t"                     \
        extra                                   \
        ".ifndef " LOCK_SECTION_NAME "\n\t"     \
        LOCK_SECTION_NAME ":\n\t"               \
        ".endif\n"

#define LOCK_SECTION_END                        \
        ".previous\n\t"

#define __lockfunc __section(".spinlock.text")


#include <linux/spinlock_types.h>


#ifdef CONFIG_SMP
# include <asm/spinlock.h>
#else
# include <linux/spinlock_up.h>
#endif

#ifdef CONFIG_DEBUG_SPINLOCK
  extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
				   struct lock_class_key *key, short inner);

# define raw_spin_lock_init(lock)					\
do {									\
	static struct lock_class_key __key;				\
									\
	__raw_spin_lock_init((lock), #lock, &__key, LD_WAIT_SPIN);	\
} while (0)

#else
# define raw_spin_lock_init(lock)				\
	do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0)
#endif

#define raw_spin_is_locked(lock)	arch_spin_is_locked(&(lock)->raw_lock)

#ifdef arch_spin_is_contended
#define raw_spin_is_contended(lock)	arch_spin_is_contended(&(lock)->raw_lock)
#else
#define raw_spin_is_contended(lock)	(((void)(lock), 0))
#endif 


#ifndef smp_mb__after_spinlock
#define smp_mb__after_spinlock()	kcsan_mb()
#endif

#ifdef CONFIG_DEBUG_SPINLOCK
 extern void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock);
 extern int do_raw_spin_trylock(raw_spinlock_t *lock);
 extern void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock);
#else
static inline void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock)
{
	__acquire(lock);
	arch_spin_lock(&lock->raw_lock);
	mmiowb_spin_lock();
}

static inline int do_raw_spin_trylock(raw_spinlock_t *lock)
{
	int ret = arch_spin_trylock(&(lock)->raw_lock);

	if (ret)
		mmiowb_spin_lock();

	return ret;
}

static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock)
{
	mmiowb_spin_unlock();
	arch_spin_unlock(&lock->raw_lock);
	__release(lock);
}
#endif


#define raw_spin_trylock(lock)	__cond_lock(lock, _raw_spin_trylock(lock))

#define raw_spin_lock(lock)	_raw_spin_lock(lock)

#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define raw_spin_lock_nested(lock, subclass) \
	_raw_spin_lock_nested(lock, subclass)

# define raw_spin_lock_nest_lock(lock, nest_lock)			\
	 do {								\
		 typecheck(struct lockdep_map *, &(nest_lock)->dep_map);\
		 _raw_spin_lock_nest_lock(lock, &(nest_lock)->dep_map);	\
	 } while (0)
#else

# define raw_spin_lock_nested(lock, subclass)		\
	_raw_spin_lock(((void)(subclass), (lock)))
# define raw_spin_lock_nest_lock(lock, nest_lock)	_raw_spin_lock(lock)
#endif

#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)

#define raw_spin_lock_irqsave(lock, flags)			\
	do {						\
		typecheck(unsigned long, flags);	\
		flags = _raw_spin_lock_irqsave(lock);	\
	} while (0)

#ifdef CONFIG_DEBUG_LOCK_ALLOC
#define raw_spin_lock_irqsave_nested(lock, flags, subclass)		\
	do {								\
		typecheck(unsigned long, flags);			\
		flags = _raw_spin_lock_irqsave_nested(lock, subclass);	\
	} while (0)
#else
#define raw_spin_lock_irqsave_nested(lock, flags, subclass)		\
	do {								\
		typecheck(unsigned long, flags);			\
		flags = _raw_spin_lock_irqsave(lock);			\
	} while (0)
#endif

#else

#define raw_spin_lock_irqsave(lock, flags)		\
	do {						\
		typecheck(unsigned long, flags);	\
		_raw_spin_lock_irqsave(lock, flags);	\
	} while (0)

#define raw_spin_lock_irqsave_nested(lock, flags, subclass)	\
	raw_spin_lock_irqsave(lock, flags)

#endif

#define raw_spin_lock_irq(lock)		_raw_spin_lock_irq(lock)
#define raw_spin_lock_bh(lock)		_raw_spin_lock_bh(lock)
#define raw_spin_unlock(lock)		_raw_spin_unlock(lock)
#define raw_spin_unlock_irq(lock)	_raw_spin_unlock_irq(lock)

#define raw_spin_unlock_irqrestore(lock, flags)		\
	do {							\
		typecheck(unsigned long, flags);		\
		_raw_spin_unlock_irqrestore(lock, flags);	\
	} while (0)
#define raw_spin_unlock_bh(lock)	_raw_spin_unlock_bh(lock)

#define raw_spin_trylock_bh(lock) \
	__cond_lock(lock, _raw_spin_trylock_bh(lock))

#define raw_spin_trylock_irq(lock) \
({ \
	local_irq_disable(); \
	raw_spin_trylock(lock) ? \
	1 : ({ local_irq_enable(); 0;  }); \
})

#define raw_spin_trylock_irqsave(lock, flags) \
({ \
	local_irq_save(flags); \
	raw_spin_trylock(lock) ? \
	1 : ({ local_irq_restore(flags); 0; }); \
})

#ifndef CONFIG_PREEMPT_RT

#include <linux/rwlock.h>
#endif


#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
# include <linux/spinlock_api_smp.h>
#else
# include <linux/spinlock_api_up.h>
#endif


#ifndef CONFIG_PREEMPT_RT



static __always_inline raw_spinlock_t *spinlock_check(spinlock_t *lock)
{
	return &lock->rlock;
}

#ifdef CONFIG_DEBUG_SPINLOCK

# define spin_lock_init(lock)					\
do {								\
	static struct lock_class_key __key;			\
								\
	__raw_spin_lock_init(spinlock_check(lock),		\
			     #lock, &__key, LD_WAIT_CONFIG);	\
} while (0)

#else

# define spin_lock_init(_lock)			\
do {						\
	spinlock_check(_lock);			\
	*(_lock) = __SPIN_LOCK_UNLOCKED(_lock);	\
} while (0)

#endif

static __always_inline void spin_lock(spinlock_t *lock)
{
	raw_spin_lock(&lock->rlock);
}

static __always_inline void spin_lock_bh(spinlock_t *lock)
{
	raw_spin_lock_bh(&lock->rlock);
}

static __always_inline int spin_trylock(spinlock_t *lock)
{
	return raw_spin_trylock(&lock->rlock);
}

#define spin_lock_nested(lock, subclass)			\
do {								\
	raw_spin_lock_nested(spinlock_check(lock), subclass);	\
} while (0)

#define spin_lock_nest_lock(lock, nest_lock)				\
do {									\
	raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock);	\
} while (0)

static __always_inline void spin_lock_irq(spinlock_t *lock)
{
	raw_spin_lock_irq(&lock->rlock);
}

#define spin_lock_irqsave(lock, flags)				\
do {								\
	raw_spin_lock_irqsave(spinlock_check(lock), flags);	\
} while (0)

#define spin_lock_irqsave_nested(lock, flags, subclass)			\
do {									\
	raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \
} while (0)

static __always_inline void spin_unlock(spinlock_t *lock)
{
	raw_spin_unlock(&lock->rlock);
}

static __always_inline void spin_unlock_bh(spinlock_t *lock)
{
	raw_spin_unlock_bh(&lock->rlock);
}

static __always_inline void spin_unlock_irq(spinlock_t *lock)
{
	raw_spin_unlock_irq(&lock->rlock);
}

static __always_inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
{
	raw_spin_unlock_irqrestore(&lock->rlock, flags);
}

static __always_inline int spin_trylock_bh(spinlock_t *lock)
{
	return raw_spin_trylock_bh(&lock->rlock);
}

static __always_inline int spin_trylock_irq(spinlock_t *lock)
{
	return raw_spin_trylock_irq(&lock->rlock);
}

#define spin_trylock_irqsave(lock, flags)			\
({								\
	raw_spin_trylock_irqsave(spinlock_check(lock), flags); \
})


static __always_inline int spin_is_locked(spinlock_t *lock)
{
	return raw_spin_is_locked(&lock->rlock);
}

static __always_inline int spin_is_contended(spinlock_t *lock)
{
	return raw_spin_is_contended(&lock->rlock);
}

#define assert_spin_locked(lock)	assert_raw_spin_locked(&(lock)->rlock)

#else  
# include <linux/spinlock_rt.h>
#endif 


#include <linux/atomic.h>

extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
#define atomic_dec_and_lock(atomic, lock) \
		__cond_lock(lock, _atomic_dec_and_lock(atomic, lock))

extern int _atomic_dec_and_lock_irqsave(atomic_t *atomic, spinlock_t *lock,
					unsigned long *flags);
#define atomic_dec_and_lock_irqsave(atomic, lock, flags) \
		__cond_lock(lock, _atomic_dec_and_lock_irqsave(atomic, lock, &(flags)))

int __alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *lock_mask,
			     size_t max_size, unsigned int cpu_mult,
			     gfp_t gfp, const char *name,
			     struct lock_class_key *key);

#define alloc_bucket_spinlocks(locks, lock_mask, max_size, cpu_mult, gfp)    \
	({								     \
		static struct lock_class_key key;			     \
		int ret;						     \
									     \
		ret = __alloc_bucket_spinlocks(locks, lock_mask, max_size,   \
					       cpu_mult, gfp, #locks, &key); \
		ret;							     \
	})

void free_bucket_spinlocks(spinlock_t *locks);

DEFINE_LOCK_GUARD_1(raw_spinlock, raw_spinlock_t,
		    raw_spin_lock(_T->lock),
		    raw_spin_unlock(_T->lock))

DEFINE_LOCK_GUARD_1(raw_spinlock_nested, raw_spinlock_t,
		    raw_spin_lock_nested(_T->lock, SINGLE_DEPTH_NESTING),
		    raw_spin_unlock(_T->lock))

DEFINE_LOCK_GUARD_1(raw_spinlock_irq, raw_spinlock_t,
		    raw_spin_lock_irq(_T->lock),
		    raw_spin_unlock_irq(_T->lock))

DEFINE_LOCK_GUARD_1(raw_spinlock_irqsave, raw_spinlock_t,
		    raw_spin_lock_irqsave(_T->lock, _T->flags),
		    raw_spin_unlock_irqrestore(_T->lock, _T->flags),
		    unsigned long flags)

DEFINE_LOCK_GUARD_1(spinlock, spinlock_t,
		    spin_lock(_T->lock),
		    spin_unlock(_T->lock))

DEFINE_LOCK_GUARD_1(spinlock_irq, spinlock_t,
		    spin_lock_irq(_T->lock),
		    spin_unlock_irq(_T->lock))

DEFINE_LOCK_GUARD_1(spinlock_irqsave, spinlock_t,
		    spin_lock_irqsave(_T->lock, _T->flags),
		    spin_unlock_irqrestore(_T->lock, _T->flags),
		    unsigned long flags)

#undef __LINUX_INSIDE_SPINLOCK_H
#endif 
