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Put back __HAVE_KERNEL_CTX_SWITCH for David Miller's sparc drm driver 

(which doesn't live in our cvs).
main
Keith Whitwell 2003-04-27 09:53:58 +00:00
parent 22b9b720d5
commit c584292e30
2 changed files with 58 additions and 0 deletions
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29
linux-core/drm_drv.c
View File

@ -84,6 +84,9 @@
#ifndef __HAVE_SG
#define __HAVE_SG 0
#endif
#ifndef __HAVE_KERNEL_CTX_SWITCH
#define __HAVE_KERNEL_CTX_SWITCH 0
#endif
#ifndef __HAVE_DRIVER_FOPS_READ
#define __HAVE_DRIVER_FOPS_READ 0
#endif
@ -1014,6 +1017,12 @@ int DRM(lock)( struct inode *inode, struct file *filp,
if ( lock.flags & _DRM_LOCK_QUIESCENT ) {
DRIVER_DMA_QUIESCENT();
}
#endif
#if __HAVE_KERNEL_CTX_SWITCH
if ( dev->last_context != lock.context ) {
DRM(context_switch)(dev, dev->last_context,
lock.context);
}
#endif
}
@ -1041,6 +1050,25 @@ int DRM(unlock)( struct inode *inode, struct file *filp,
atomic_inc( &dev->counts[_DRM_STAT_UNLOCKS] );
#if __HAVE_KERNEL_CTX_SWITCH
/* We no longer really hold it, but if we are the next
* agent to request it then we should just be able to
* take it immediately and not eat the ioctl.
*/
dev->lock.filp = 0;
{
__volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
unsigned int old, new, prev, ctx;
ctx = lock.context;
do {
old = *plock;
new = ctx;
prev = cmpxchg(plock, old, new);
} while (prev != old);
}
wake_up_interruptible(&dev->lock.lock_queue);
#else
DRM(lock_transfer)( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
#if __HAVE_DMA_SCHEDULE
@ -1055,6 +1083,7 @@ int DRM(unlock)( struct inode *inode, struct file *filp,
DRM_ERROR( "\n" );
}
}
#endif /* !__HAVE_KERNEL_CTX_SWITCH */
unblock_all_signals();
return 0;

29
linux/drm_drv.h
View File

@ -84,6 +84,9 @@
#ifndef __HAVE_SG
#define __HAVE_SG 0
#endif
#ifndef __HAVE_KERNEL_CTX_SWITCH
#define __HAVE_KERNEL_CTX_SWITCH 0
#endif
#ifndef __HAVE_DRIVER_FOPS_READ
#define __HAVE_DRIVER_FOPS_READ 0
#endif
@ -1014,6 +1017,12 @@ int DRM(lock)( struct inode *inode, struct file *filp,
if ( lock.flags & _DRM_LOCK_QUIESCENT ) {
DRIVER_DMA_QUIESCENT();
}
#endif
#if __HAVE_KERNEL_CTX_SWITCH
if ( dev->last_context != lock.context ) {
DRM(context_switch)(dev, dev->last_context,
lock.context);
}
#endif
}
@ -1041,6 +1050,25 @@ int DRM(unlock)( struct inode *inode, struct file *filp,
atomic_inc( &dev->counts[_DRM_STAT_UNLOCKS] );
#if __HAVE_KERNEL_CTX_SWITCH
/* We no longer really hold it, but if we are the next
* agent to request it then we should just be able to
* take it immediately and not eat the ioctl.
*/
dev->lock.filp = 0;
{
__volatile__ unsigned int *plock = &dev->lock.hw_lock->lock;
unsigned int old, new, prev, ctx;
ctx = lock.context;
do {
old = *plock;
new = ctx;
prev = cmpxchg(plock, old, new);
} while (prev != old);
}
wake_up_interruptible(&dev->lock.lock_queue);
#else
DRM(lock_transfer)( dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT );
#if __HAVE_DMA_SCHEDULE
@ -1055,6 +1083,7 @@ int DRM(unlock)( struct inode *inode, struct file *filp,
DRM_ERROR( "\n" );
}
}
#endif /* !__HAVE_KERNEL_CTX_SWITCH */
unblock_all_signals();
return 0;