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/*
 * kernel/mutex-debug.c
 *
 * Debugging code for mutexes
 *
 * Started by Ingo Molnar:
 *
 *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 *
 * lock debugging, locking tree, deadlock detection started by:
 *
 *  Copyright (C) 2004, LynuxWorks, Inc., Igor Manyilov, Bill Huey
 *  Released under the General Public License (GPL).
 */
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/poison.h>
#include <linux/spinlock.h>
#include <linux/kallsyms.h>
#include <linux/interrupt.h>
#include <linux/debug_locks.h>

#include "mutex-debug.h"

/*
 * Must be called with lock->wait_lock held.
 */
void debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner)
{
	lock->owner = new_owner;
}

void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
{
	memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
	waiter->magic = waiter;
	INIT_LIST_HEAD(&waiter->list);
}

void debug_mutex_wake_waiter(struct mutex *lock, struct mutex_waiter *waiter)
{
	SMP_DEBUG_LOCKS_WARN_ON(!spin_is_locked(&lock->wait_lock));
	DEBUG_LOCKS_WARN_ON(list_empty(&lock->wait_list));
	DEBUG_LOCKS_WARN_ON(waiter->magic != waiter);
	DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
}

void debug_mutex_free_waiter(struct mutex_waiter *waiter)
{
	DEBUG_LOCKS_WARN_ON(!list_empty(&waiter->list));
	memset(waiter, MUTEX_DEBUG_FREE, sizeof(*waiter));
}

void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter,
			    struct thread_info *ti)
{
	SMP_DEBUG_LOCKS_WARN_ON(!spin_is_locked(&lock->wait_lock));

	/* Mark the current thread as blocked on the lock: */
	ti->task->blocked_on = waiter;
	waiter->lock = lock;
}

void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
			 struct thread_info *ti)
{
	DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
	DEBUG_LOCKS_WARN_ON(waiter->task != ti->task);
	DEBUG_LOCKS_WARN_ON(ti->task->blocked_on != waiter);
	ti->task->blocked_on = NULL;

	list_del_init(&waiter->list);
	waiter->task = NULL;
}

void debug_mutex_unlock(struct mutex *lock)
{
	if (unlikely(!debug_locks))
		return;

	DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
	DEBUG_LOCKS_WARN_ON(lock->magic != lock);
	DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
	DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
}

void debug_mutex_init(struct mutex *lock, const char *name,
		      struct lock_class_key *key)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
	/*
	 * Make sure we are not reinitializing a held lock:
	 */
	debug_check_no_locks_freed((void *)lock, sizeof(*lock));
	lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
	lock->owner = NULL;
	lock->magic = lock;
}

/***
 * mutex_destroy - mark a mutex unusable
 * @lock: the mutex to be destroyed
 *
 * This function marks the mutex uninitialized, and any subsequent
 * use of the mutex is forbidden. The mutex must not be locked when
 * this function is called.
 */
void fastcall mutex_destroy(struct mutex *lock)
{
	DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock));
	lock->magic = NULL;
}

EXPORT_SYMBOL_GPL(mutex_destroy);
HAKE) #define dcprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_CONFIG) #define ddlprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_DL) #define drsprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_RESET) #define dsprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_SCSI) #define dctlprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_IOCTL) #define dfcprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_FC) #define dsasprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_SAS) #define dsaswideprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_SAS_WIDE) /* * Verbose logging */ #if defined(MPT_DEBUG_VERBOSE) && defined(CONFIG_FUSION_LOGGING) static inline void DBG_DUMP_FW_DOWNLOAD(MPT_ADAPTER *ioc, u32 *mfp, int numfrags) { int i; if (!(ioc->debug_level & MPT_DEBUG)) return; printk(KERN_DEBUG "F/W download request:\n"); for (i=0; i < 7+numfrags*2; i++) printk(" %08x", le32_to_cpu(mfp[i])); printk("\n"); } static inline void DBG_DUMP_PUT_MSG_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int ii, n; if (!(ioc->debug_level & MPT_DEBUG_MSG_FRAME)) return; printk(KERN_DEBUG "%s: About to Put msg frame @ %p:\n", ioc->name, mfp); n = ioc->req_sz/4 - 1; while (mfp[n] == 0) n--; for (ii=0; ii<=n; ii++) { if (ii && ((ii%8)==0)) printk("\n"); printk(" %08x", le32_to_cpu(mfp[ii])); } printk("\n"); } static inline void DBG_DUMP_FW_REQUEST_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_MSG_FRAME)) return; n = 10; printk(KERN_INFO " "); for (i = 0; i < n; i++) printk(" %08x", le32_to_cpu(mfp[i])); printk("\n"); } static inline void DBG_DUMP_REQUEST_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_MSG_FRAME)) return; n = 24; for (i=0; i<n; i++) { if (i && ((i%8)==0)) printk("\n"); printk("%08x ", le32_to_cpu(mfp[i])); } printk("\n"); } static inline void DBG_DUMP_REPLY_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_MSG_FRAME)) return; n = (le32_to_cpu(mfp[0]) & 0x00FF0000) >> 16; printk(KERN_INFO " "); for (i=0; i<n; i++) printk(" %08x", le32_to_cpu(mfp[i])); printk("\n"); } static inline void DBG_DUMP_REQUEST_FRAME_HDR(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_MSG_FRAME)) return; n = 3; printk(KERN_INFO " "); for (i=0; i<n; i++) printk(" %08x", le32_to_cpu(mfp[i])); printk("\n"); } static inline void DBG_DUMP_TM_REQUEST_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_TM)) return; n = 13; printk(KERN_DEBUG "TM_REQUEST:\n"); for (i=0; i<n; i++) { if (i && ((i%8)==0)) printk("\n"); printk("%08x ", le32_to_cpu(mfp[i])); } printk("\n"); } static inline void DBG_DUMP_TM_REPLY_FRAME(MPT_ADAPTER *ioc, u32 *mfp) { int i, n; if (!(ioc->debug_level & MPT_DEBUG_TM)) return; n = (le32_to_cpu(mfp[0]) & 0x00FF0000) >> 16; printk(KERN_DEBUG "TM_REPLY MessageLength=%d:\n", n); for (i=0; i<n; i++) { if (i && ((i%8)==0)) printk("\n"); printk(" %08x", le32_to_cpu(mfp[i])); } printk("\n"); } #define dmfprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_MSG_FRAME) # else /* ifdef MPT_DEBUG_MF */ #define DBG_DUMP_FW_DOWNLOAD(IOC, mfp, numfrags) #define DBG_DUMP_PUT_MSG_FRAME(IOC, mfp) #define DBG_DUMP_FW_REQUEST_FRAME(IOC, mfp) #define DBG_DUMP_REQUEST_FRAME(IOC, mfp) #define DBG_DUMP_REPLY_FRAME(IOC, mfp) #define DBG_DUMP_REQUEST_FRAME_HDR(IOC, mfp) #define DBG_DUMP_TM_REQUEST_FRAME(IOC, mfp) #define DBG_DUMP_TM_REPLY_FRAME(IOC, mfp) #define dmfprintk(IOC, CMD) \ MPT_CHECK_LOGGING(IOC, CMD, MPT_DEBUG_MSG_FRAME) #endif /* defined(MPT_DEBUG_VERBOSE) && defined(CONFIG_FUSION_LOGGING) */ #endif /* ifndef MPTDEBUG_H_INCLUDED */