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miext: Ensure xshmfence is only called when driver supports it 

This provides a place for drivers to insert their own FD-based
SyncFence implementations, and prevents applications from using DRI3
SyncFence creation functions unless the driver has some support for
them.

Signed-off-by: Keith Packard <keithp@keithp.com>
Tested-by: Fredrik Höglund <fredrik@kde.org>
This commit is contained in:
Keith Packard 2013-11-18 22:36:17 -08:00
parent 037566c57c
commit f1604002a3
6 changed files with 162 additions and 10 deletions
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3
miext/sync/Makefile.am
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@ -5,7 +5,7 @@ AM_CFLAGS = $(DIX_CFLAGS)
AM_CPPFLAGS =
if XORG
sdk_HEADERS = misync.h misyncstr.h misyncshm.h
sdk_HEADERS = misync.h misyncstr.h misyncshm.h misyncfd.h
endif
XSHMFENCE_SRCS = misyncshm.c
@ -13,6 +13,7 @@ XSHMFENCE_SRCS = misyncshm.c
libsync_la_SOURCES = \
misync.c \
misync.h \
misyncfd.c \
misyncstr.h
if XSHMFENCE

2
miext/sync/misync.h
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@ -42,8 +42,8 @@ typedef struct _syncScreenFuncs {
SyncScreenDestroyFenceFunc DestroyFence;
} SyncScreenFuncsRec, *SyncScreenFuncsPtr;
extern _X_EXPORT void
extern _X_EXPORT void
miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
Bool initially_triggered);
extern _X_EXPORT void

99
miext/sync/misyncfd.c Normal file
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@ -0,0 +1,99 @@
/*
* Copyright © 2013 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "scrnintstr.h"
#include "misync.h"
#include "misyncstr.h"
#include "misyncfd.h"
#include "pixmapstr.h"
static DevPrivateKeyRec syncFdScreenPrivateKey;
typedef struct _SyncFdScreenPrivate {
SyncFdScreenFuncsRec funcs;
} SyncFdScreenPrivateRec, *SyncFdScreenPrivatePtr;
static inline SyncFdScreenPrivatePtr sync_fd_screen_priv(ScreenPtr pScreen)
{
if (!dixPrivateKeyRegistered(&syncFdScreenPrivateKey))
return NULL;
return dixLookupPrivate(&pScreen->devPrivates, &syncFdScreenPrivateKey);
}
int
miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered)
{
SyncFdScreenPrivatePtr priv = sync_fd_screen_priv(pDraw->pScreen);
if (!priv)
return BadMatch;
return (*priv->funcs.CreateFenceFromFd)(pDraw->pScreen, pFence, fd, initially_triggered);
}
int
miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
{
SyncFdScreenPrivatePtr priv = sync_fd_screen_priv(pDraw->pScreen);
if (!priv)
return -1;
return (*priv->funcs.GetFenceFd)(pDraw->pScreen, pFence);
}
_X_EXPORT Bool miSyncFdScreenInit(ScreenPtr pScreen,
const SyncFdScreenFuncsRec *funcs)
{
SyncFdScreenPrivatePtr priv;
/* Check to see if we've already been initialized */
if (sync_fd_screen_priv(pScreen) != NULL)
return FALSE;
if (!miSyncSetup(pScreen))
return FALSE;
if (!dixPrivateKeyRegistered(&syncFdScreenPrivateKey)) {
if (!dixRegisterPrivateKey(&syncFdScreenPrivateKey, PRIVATE_SCREEN, 0))
return FALSE;
}
priv = calloc(1, sizeof (SyncFdScreenPrivateRec));
if (!priv)
return FALSE;
/* Will require version checks when there are multiple versions
* of the funcs structure
*/
priv->funcs = *funcs;
dixSetPrivate(&pScreen->devPrivates, &syncFdScreenPrivateKey, priv);
return TRUE;
}

45
miext/sync/misyncfd.h Normal file
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@ -0,0 +1,45 @@
/*
* Copyright © 2013 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _MISYNCFD_H_
#define _MISYNCFD_H_
typedef int (*SyncScreenCreateFenceFromFdFunc) (ScreenPtr screen,
SyncFence *fence,
int fd,
Bool initially_triggered);
typedef int (*SyncScreenGetFenceFdFunc) (ScreenPtr screen,
SyncFence *fence);
#define SYNC_FD_SCREEN_FUNCS_VERSION 1
typedef struct _syncFdScreenFuncs {
int version;
SyncScreenCreateFenceFromFdFunc CreateFenceFromFd;
SyncScreenGetFenceFdFunc GetFenceFd;
} SyncFdScreenFuncsRec, *SyncFdScreenFuncsPtr;
extern _X_EXPORT Bool miSyncFdScreenInit(ScreenPtr pScreen,
const SyncFdScreenFuncsRec *funcs);
#endif /* _MISYNCFD_H_ */

21
miext/sync/misyncshm.c
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@ -28,6 +28,7 @@
#include "misync.h"
#include "misyncstr.h"
#include "misyncshm.h"
#include "misyncfd.h"
#include "pixmapstr.h"
#include <sys/mman.h>
#include <unistd.h>
@ -118,13 +119,12 @@ miSyncShmScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
miSyncScreenDestroyFence(pScreen, pFence);
}
int
miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initially_triggered)
static int
miSyncShmCreateFenceFromFd(ScreenPtr pScreen, SyncFence *pFence, int fd, Bool initially_triggered)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
miSyncInitFence(pDraw->pScreen, pFence, initially_triggered);
miSyncInitFence(pScreen, pFence, initially_triggered);
pPriv->fence = xshmfence_map_shm(fd);
if (pPriv->fence) {
@ -136,8 +136,8 @@ miSyncInitFenceFromFD(DrawablePtr pDraw, SyncFence *pFence, int fd, BOOL initial
return BadValue;
}
int
miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
static int
miSyncShmGetFenceFd(ScreenPtr pScreen, SyncFence *pFence)
{
SyncShmFencePrivatePtr pPriv = SYNC_FENCE_PRIV(pFence);
@ -154,11 +154,17 @@ miSyncFDFromFence(DrawablePtr pDraw, SyncFence *pFence)
return pPriv->fd;
}
static const SyncFdScreenFuncsRec miSyncShmScreenFuncs = {
.version = SYNC_FD_SCREEN_FUNCS_VERSION,
.CreateFenceFromFd = miSyncShmCreateFenceFromFd,
.GetFenceFd = miSyncShmGetFenceFd
};
_X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen)
{
SyncScreenFuncsPtr funcs;
if (!miSyncSetup(pScreen))
if (!miSyncFdScreenInit(pScreen, &miSyncShmScreenFuncs))
return FALSE;
if (!dixPrivateKeyRegistered(&syncShmFencePrivateKey)) {
@ -171,6 +177,7 @@ _X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen)
funcs->CreateFence = miSyncShmScreenCreateFence;
funcs->DestroyFence = miSyncShmScreenDestroyFence;
return TRUE;
}

2
miext/sync/misyncshm.h
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@ -21,7 +21,7 @@
*/
#ifndef _MISYNCSHM_H_
#define _MISYNCSYM_H_
#define _MISYNCSHM_H_
extern _X_EXPORT Bool miSyncShmScreenInit(ScreenPtr pScreen);