1 files changed, 326 insertions, 0 deletions
diff --git a/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_locks.h b/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_locks.h
new file mode 100644
index 00000000000..289ed502724
--- /dev/null
+++ b/drivers/gpu/arm/mali400/r4p0_rel0/linux/mali_osk_locks.h
@@ -0,0 +1,326 @@
+/*
+ * Copyright (C) 2010-2012 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.
+ */
+
+/**
+ * @file mali_osk_locks.h
+ * Defines OS abstraction of lock and mutex
+ */
+#ifndef _MALI_OSK_LOCKS_H
+#define _MALI_OSK_LOCKS_H
+
+#include <linux/spinlock.h>
+#include <linux/rwsem.h>
+#include <linux/mutex.h>
+
+#include <linux/slab.h>
+
+#include "mali_osk_types.h"
+
+#ifdef _cplusplus
+extern "C" {
+#endif
+
+	/* When DEBUG is enabled, this struct will be used to track owner, mode and order checking */
+#ifdef DEBUG
+	struct _mali_osk_lock_debug_s {
+		u32 owner;
+		_mali_osk_lock_flags_t orig_flags;
+		_mali_osk_lock_order_t order;
+		struct _mali_osk_lock_debug_s *next;
+	};
+#endif
+
+	/* Anstraction of spinlock_t */
+	struct _mali_osk_spinlock_s {
+#ifdef DEBUG
+		struct _mali_osk_lock_debug_s checker;
+#endif
+		spinlock_t spinlock;
+	};
+
+	/* Abstration of spinlock_t and lock flag which is used to store register's state before locking */
+	struct _mali_osk_spinlock_irq_s {
+#ifdef DEBUG
+		struct _mali_osk_lock_debug_s checker;
+#endif
+
+		spinlock_t spinlock;
+		unsigned long flags;
+	};
+
+	/* Abstraction of rw_semaphore in OS */
+	struct _mali_osk_mutex_rw_s {
+#ifdef DEBUG
+		struct _mali_osk_lock_debug_s checker;
+		_mali_osk_lock_mode_t mode;
+#endif
+
+		struct rw_semaphore rw_sema;
+	};
+
+	/* Mutex and mutex_interruptible functions share the same osk mutex struct */
+	struct _mali_osk_mutex_s {
+#ifdef DEBUG
+		struct _mali_osk_lock_debug_s checker;
+#endif
+		struct mutex mutex;
+	};
+
+#ifdef DEBUG
+	/** @brief _mali_osk_locks_debug_init/add/remove() functions are declared when DEBUG is enabled and
+	 * defined in file mali_osk_locks.c. When LOCK_ORDER_CHECKING is enabled, calling these functions when we
+	 * init/lock/unlock a lock/mutex, we could track lock order of a given tid. */
+	void _mali_osk_locks_debug_init(struct _mali_osk_lock_debug_s *checker, _mali_osk_lock_flags_t flags, _mali_osk_lock_order_t order);
+	void _mali_osk_locks_debug_add(struct _mali_osk_lock_debug_s *checker);
+	void _mali_osk_locks_debug_remove(struct _mali_osk_lock_debug_s *checker);
+
+	/** @brief This function can return a given lock's owner when DEBUG	is enabled. */
+	static inline u32 _mali_osk_lock_get_owner(struct _mali_osk_lock_debug_s *lock)
+	{
+		return lock->owner;
+	}
+#else
+#define _mali_osk_locks_debug_init(x, y, z) do {} while (0)
+#define _mali_osk_locks_debug_add(x) do {} while (0)
+#define _mali_osk_locks_debug_remove(x) do {} while (0)
+#endif
+
+	/** @brief Before use _mali_osk_spin_lock, init function should be used to allocate memory and initial spinlock*/
+	static inline _mali_osk_spinlock_t *_mali_osk_spinlock_init(_mali_osk_lock_flags_t flags, _mali_osk_lock_order_t order)
+	{
+		_mali_osk_spinlock_t *lock = NULL;
+
+		lock = kmalloc(sizeof(_mali_osk_spinlock_t), GFP_KERNEL);
+		if (NULL == lock) {
+			return NULL;
+		}
+		spin_lock_init(&lock->spinlock);
+		_mali_osk_locks_debug_init((struct _mali_osk_lock_debug_s *)lock, flags, order);
+		return lock;
+	}
+
+	/** @brief Lock a spinlock */
+	static inline void  _mali_osk_spinlock_lock(_mali_osk_spinlock_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		spin_lock(&lock->spinlock);
+		_mali_osk_locks_debug_add((struct _mali_osk_lock_debug_s *)lock);
+	}
+
+	/** @brief Unlock a spinlock */
+	static inline void _mali_osk_spinlock_unlock(_mali_osk_spinlock_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		_mali_osk_locks_debug_remove((struct _mali_osk_lock_debug_s *)lock);
+		spin_unlock(&lock->spinlock);
+	}
+
+	/** @brief Free a memory block which the argument lock pointed to and its type must be
+	 * _mali_osk_spinlock_t *. */
+	static inline void _mali_osk_spinlock_term(_mali_osk_spinlock_t *lock)
+	{
+		/* Parameter validation  */
+		BUG_ON(NULL == lock);
+
+		/* Linux requires no explicit termination of spinlocks, semaphores, or rw_semaphores */
+		kfree(lock);
+	}
+
+	/** @brief Before _mali_osk_spinlock_irq_lock/unlock/term() is called, init function should be
+	 * called to initial spinlock and flags in struct _mali_osk_spinlock_irq_t. */
+	static inline _mali_osk_spinlock_irq_t *_mali_osk_spinlock_irq_init(_mali_osk_lock_flags_t flags, _mali_osk_lock_order_t order)
+	{
+		_mali_osk_spinlock_irq_t *lock = NULL;
+		lock = kmalloc(sizeof(_mali_osk_spinlock_irq_t), GFP_KERNEL);
+
+		if (NULL == lock) {
+			return NULL;
+		}
+
+		lock->flags = 0;
+		spin_lock_init(&lock->spinlock);
+		_mali_osk_locks_debug_init((struct _mali_osk_lock_debug_s *)lock, flags, order);
+		return lock;
+	}
+
+	/** @brief Lock spinlock and save the register's state */
+	static inline void _mali_osk_spinlock_irq_lock(_mali_osk_spinlock_irq_t *lock)
+	{
+		unsigned long tmp_flags;
+
+		BUG_ON(NULL == lock);
+		spin_lock_irqsave(&lock->spinlock, tmp_flags);
+		lock->flags = tmp_flags;
+		_mali_osk_locks_debug_add((struct _mali_osk_lock_debug_s *)lock);
+	}
+
+	/** @brief Unlock spinlock with saved register's state */
+	static inline void _mali_osk_spinlock_irq_unlock(_mali_osk_spinlock_irq_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		_mali_osk_locks_debug_remove((struct _mali_osk_lock_debug_s *)lock);
+		spin_unlock_irqrestore(&lock->spinlock, lock->flags);
+	}
+
+	/** @brief Destroy a given memory block which lock pointed to, and the lock type must be
+	 * _mali_osk_spinlock_irq_t *. */
+	static inline void _mali_osk_spinlock_irq_term(_mali_osk_spinlock_irq_t *lock)
+	{
+		/* Parameter validation  */
+		BUG_ON(NULL == lock);
+
+		/* Linux requires no explicit termination of spinlocks, semaphores, or rw_semaphores */
+		kfree(lock);
+	}
+
+	/** @brief Before _mali_osk_mutex_rw_wait/signal/term() is called, we should call
+	 * _mali_osk_mutex_rw_init() to kmalloc a memory block and initial part of elements in it. */
+	static inline _mali_osk_mutex_rw_t *_mali_osk_mutex_rw_init(_mali_osk_lock_flags_t flags, _mali_osk_lock_order_t order)
+	{
+		_mali_osk_mutex_rw_t *lock = NULL;
+
+		lock = kmalloc(sizeof(_mali_osk_mutex_rw_t), GFP_KERNEL);
+
+		if (NULL == lock) {
+			return NULL;
+		}
+
+		init_rwsem(&lock->rw_sema);
+		_mali_osk_locks_debug_init((struct _mali_osk_lock_debug_s *)lock, flags, order);
+		return lock;
+	}
+
+	/** @brief When call _mali_osk_mutex_rw_wait/signal() functions, the second argument mode
+	 * should be assigned with value _MALI_OSK_LOCKMODE_RO or _MALI_OSK_LOCKMODE_RW */
+	static inline void _mali_osk_mutex_rw_wait(_mali_osk_mutex_rw_t *lock, _mali_osk_lock_mode_t mode)
+	{
+		BUG_ON(NULL == lock);
+		BUG_ON(!(_MALI_OSK_LOCKMODE_RO == mode || _MALI_OSK_LOCKMODE_RW == mode));
+
+		if (mode == _MALI_OSK_LOCKMODE_RO) {
+			down_read(&lock->rw_sema);
+		} else {
+			down_write(&lock->rw_sema);
+		}
+
+#ifdef DEBUG
+		if (mode == _MALI_OSK_LOCKMODE_RW) {
+			lock->mode = mode;
+		} else { /* mode == _MALI_OSK_LOCKMODE_RO */
+			lock->mode = mode;
+		}
+		_mali_osk_locks_debug_add((struct _mali_osk_lock_debug_s *)lock);
+#endif
+	}
+
+	/** @brief Up lock->rw_sema with up_read/write() accordinf argument mode's value. */
+	static inline void  _mali_osk_mutex_rw_signal(_mali_osk_mutex_rw_t *lock, _mali_osk_lock_mode_t mode)
+	{
+		BUG_ON(NULL == lock);
+		BUG_ON(!(_MALI_OSK_LOCKMODE_RO == mode || _MALI_OSK_LOCKMODE_RW == mode));
+#ifdef DEBUG
+		/* make sure the thread releasing the lock actually was the owner */
+		if (mode == _MALI_OSK_LOCKMODE_RW) {
+			_mali_osk_locks_debug_remove((struct _mali_osk_lock_debug_s *)lock);
+			/* This lock now has no owner */
+			lock->checker.owner = 0;
+		}
+#endif
+
+		if (mode == _MALI_OSK_LOCKMODE_RO) {
+			up_read(&lock->rw_sema);
+		} else {
+			up_write(&lock->rw_sema);
+		}
+	}
+
+	/** @brief Free a given memory block which lock pointed to and its type must be
+	 * _mali_sok_mutex_rw_t *. */
+	static inline void _mali_osk_mutex_rw_term(_mali_osk_mutex_rw_t *lock)
+	{
+		/* Parameter validation  */
+		BUG_ON(NULL == lock);
+
+		/* Linux requires no explicit termination of spinlocks, semaphores, or rw_semaphores */
+		kfree(lock);
+	}
+
+	/** @brief Mutex & mutex_interruptible share the same init and term function, because they have the
+	 * same osk mutex struct, and the difference between them is which locking function they use */
+	static inline _mali_osk_mutex_t *_mali_osk_mutex_init(_mali_osk_lock_flags_t flags, _mali_osk_lock_order_t order)
+	{
+		_mali_osk_mutex_t *lock = NULL;
+
+		lock = kmalloc(sizeof(_mali_osk_mutex_t), GFP_KERNEL);
+
+		if (NULL == lock) {
+			return NULL;
+		}
+		mutex_init(&lock->mutex);
+
+		_mali_osk_locks_debug_init((struct _mali_osk_lock_debug_s *)lock, flags, order);
+		return lock;
+	}
+
+	/** @brief  Lock the lock->mutex with mutex_lock_interruptible function */
+	static inline _mali_osk_errcode_t _mali_osk_mutex_wait_interruptible(_mali_osk_mutex_t *lock)
+	{
+		_mali_osk_errcode_t err = _MALI_OSK_ERR_OK;
+
+		BUG_ON(NULL == lock);
+
+		if (mutex_lock_interruptible(&lock->mutex)) {
+			printk(KERN_WARNING "Mali: Can not lock mutex\n");
+			err = _MALI_OSK_ERR_RESTARTSYSCALL;
+		}
+
+		_mali_osk_locks_debug_add((struct _mali_osk_lock_debug_s *)lock);
+		return err;
+	}
+
+	/** @brief Unlock the lock->mutex which is locked with mutex_lock_interruptible() function. */
+	static inline void _mali_osk_mutex_signal_interruptible(_mali_osk_mutex_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		_mali_osk_locks_debug_remove((struct _mali_osk_lock_debug_s *)lock);
+		mutex_unlock(&lock->mutex);
+	}
+
+	/** @brief Lock the lock->mutex just with mutex_lock() function which could not be interruptted. */
+	static inline void _mali_osk_mutex_wait(_mali_osk_mutex_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		mutex_lock(&lock->mutex);
+		_mali_osk_locks_debug_add((struct _mali_osk_lock_debug_s *)lock);
+	}
+
+	/** @brief Unlock the lock->mutex which is locked with mutex_lock() function. */
+	static inline void _mali_osk_mutex_signal(_mali_osk_mutex_t *lock)
+	{
+		BUG_ON(NULL == lock);
+		_mali_osk_locks_debug_remove((struct _mali_osk_lock_debug_s *)lock);
+		mutex_unlock(&lock->mutex);
+	}
+
+	/** @brief Free a given memory block which lock point. */
+	static inline void _mali_osk_mutex_term(_mali_osk_mutex_t *lock)
+	{
+		/* Parameter validation  */
+		BUG_ON(NULL == lock);
+
+		/* Linux requires no explicit termination of spinlocks, semaphores, or rw_semaphores */
+		kfree(lock);
+	}
+
+#ifdef _cplusplus
+}
+#endif
+
+#endif