LXR linux/drivers/staging/mali/DX910-SW-99002-r5p1-01rel0/driver/src/devicedrv/mali/common/mali_spinlock

   1/*
   2 * Copyright (C) 2013, 2015 ARM Limited. All rights reserved.
   3 * 
   4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
   5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
   6 * 
   7 * A copy of the licence is included with the program, and can also be obtained from Free Software
   8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   9 */
  10
  11#ifndef __MALI_SPINLOCK_REENTRANT_H__
  12#define __MALI_SPINLOCK_REENTRANT_H__
  13
  14#include "mali_osk.h"
  15#include "mali_kernel_common.h"
  16
  17/**
  18 * Reentrant spinlock.
  19 */
  20struct mali_spinlock_reentrant {
  21        _mali_osk_spinlock_irq_t *lock;
  22        u32               owner;
  23        u32               counter;
  24};
  25
  26/**
  27 * Create a new reentrant spinlock.
  28 *
  29 * @param lock_order Lock order.
  30 * @return New reentrant spinlock.
  31 */
  32struct mali_spinlock_reentrant *mali_spinlock_reentrant_init(_mali_osk_lock_order_t lock_order);
  33
  34/**
  35 * Terminate reentrant spinlock and free any associated resources.
  36 *
  37 * @param spinlock Reentrant spinlock to terminate.
  38 */
  39void mali_spinlock_reentrant_term(struct mali_spinlock_reentrant *spinlock);
  40
  41/**
  42 * Wait for reentrant spinlock to be signaled.
  43 *
  44 * @param spinlock Reentrant spinlock.
  45 * @param tid Thread ID.
  46 */
  47void mali_spinlock_reentrant_wait(struct mali_spinlock_reentrant *spinlock, u32 tid);
  48
  49/**
  50 * Signal reentrant spinlock.
  51 *
  52 * @param spinlock Reentrant spinlock.
  53 * @param tid Thread ID.
  54 */
  55void mali_spinlock_reentrant_signal(struct mali_spinlock_reentrant *spinlock, u32 tid);
  56
  57/**
  58 * Check if thread is holding reentrant spinlock.
  59 *
  60 * @param spinlock Reentrant spinlock.
  61 * @param tid Thread ID.
  62 * @return MALI_TRUE if thread is holding spinlock, MALI_FALSE if not.
  63 */
  64MALI_STATIC_INLINE mali_bool mali_spinlock_reentrant_is_held(struct mali_spinlock_reentrant *spinlock, u32 tid)
  65{
  66        MALI_DEBUG_ASSERT_POINTER(spinlock->lock);
  67        return (tid == spinlock->owner && 0 < spinlock->counter);
  68}
  69
  70#endif /* __MALI_SPINLOCK_REENTRANT_H__ */
  71