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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Tx., USA
* All Rights Reserved.
* Copyright 2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
*/
#ifndef WSBM_FENCEMGR_H
#define WSBM_FENCEMGR_H
#include <stdint.h>
#include <stdlib.h>
struct _WsbmFenceObject;
struct _WsbmFenceMgr;
/*
* Do a quick check to see if the fence manager has registered the fence
* object as signaled. Note that this function may return a false negative
* answer.
*/
extern uint32_t wsbmFenceSignaledTypeCached(struct _WsbmFenceObject *fence);
/*
* Check if the fence object is signaled. This function can be substantially
* more expensive to call than the above function, but will not return a false
* negative answer. The argument "flush_type" sets the types that the
* underlying mechanism must make sure will eventually signal.
*/
extern int wsbmFenceSignaledType(struct _WsbmFenceObject *fence,
uint32_t flush_type, uint32_t * signaled);
/*
* Convenience functions.
*/
static inline int
wsbmFenceSignaled(struct _WsbmFenceObject *fence, uint32_t flush_type)
{
uint32_t signaled_types;
int ret = wsbmFenceSignaledType(fence, flush_type, &signaled_types);
if (ret)
return 0;
return ((signaled_types & flush_type) == flush_type);
}
static inline int
wsbmFenceSignaledCached(struct _WsbmFenceObject *fence, uint32_t flush_type)
{
uint32_t signaled_types = wsbmFenceSignaledTypeCached(fence);
return ((signaled_types & flush_type) == flush_type);
}
/*
* Reference a fence object.
*/
extern struct _WsbmFenceObject *wsbmFenceReference(struct _WsbmFenceObject
*fence);
/*
* Unreference a fence object. The fence object pointer will be reset to NULL.
*/
extern void wsbmFenceUnreference(struct _WsbmFenceObject **pFence);
/*
* Wait for a fence to signal the indicated fence_type.
* If "lazy_hint" is true, it indicates that the wait may sleep to avoid
* busy-wait polling.
*/
extern int wsbmFenceFinish(struct _WsbmFenceObject *fence,
uint32_t fence_type, int lazy_hint);
/*
* Create a WsbmFenceObject for manager "mgr".
*
* "private" is a pointer that should be used for the callbacks in
* struct _WsbmFenceMgrCreateInfo.
*
* if private_size is nonzero, then the info stored at *private, with size
* private size will be copied and the fence manager will instead use a
* pointer to the copied data for the callbacks in
* struct _WsbmFenceMgrCreateInfo. In that case, the object pointed to by
* "private" may be destroyed after the call to wsbmFenceCreate.
*/
extern struct _WsbmFenceObject *wsbmFenceCreate(struct _WsbmFenceMgr *mgr,
uint32_t fence_class,
uint32_t fence_type,
void *private,
size_t private_size);
extern uint32_t wsbmFenceType(struct _WsbmFenceObject *fence);
/*
* Fence creations are ordered. If a fence signals a fence_type,
* it is safe to assume that all fences of the same class that was
* created before that fence has signaled the same type.
*/
#define WSBM_FENCE_CLASS_ORDERED (1 << 0)
struct _WsbmFenceMgrCreateInfo
{
uint32_t flags;
uint32_t num_classes;
int (*signaled) (struct _WsbmFenceMgr * mgr, void *private,
uint32_t flush_type, uint32_t * signaled_type);
int (*finish) (struct _WsbmFenceMgr * mgr, void *private,
uint32_t fence_type, int lazy_hint);
int (*unreference) (struct _WsbmFenceMgr * mgr, void **private);
};
extern struct _WsbmFenceMgr *wsbmFenceMgrCreate(const struct
_WsbmFenceMgrCreateInfo
*info);
extern void wsbmFenceCmdLock(struct _WsbmFenceMgr *mgr, uint32_t fence_class);
extern void wsbmFenceCmdUnlock(struct _WsbmFenceMgr *mgr,
uint32_t fence_class);
/*
* Builtin drivers.
*/
extern struct _WsbmFenceMgr *wsbmFenceMgrTTMInit(int fd,
unsigned int numClass,
unsigned int devOffset);
extern void wsbmFenceMgrTTMTakedown(struct _WsbmFenceMgr *mgr);
#endif
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