diff options
Diffstat (limited to 'linux/drm_dma.h')
| -rw-r--r-- | linux/drm_dma.h | 82 |
1 files changed, 75 insertions, 7 deletions
diff --git a/linux/drm_dma.h b/linux/drm_dma.h index dc041592..01121ce9 100644 --- a/linux/drm_dma.h +++ b/linux/drm_dma.h @@ -540,6 +540,17 @@ int DRM(irq_install)( drm_device_t *dev, int irq ) #if __HAVE_VBL_IRQ init_waitqueue_head(&dev->vbl_queue); + + sema_init( &dev->vbl_sem, 0 ); + + INIT_LIST_HEAD( &dev->vbl_sigs.head ); + + up( &dev->vbl_sem ); + + INIT_LIST_HEAD( &dev->vbl_tq.list ); + dev->vbl_tq.sync = 0; + dev->vbl_tq.routine = DRM(vbl_immediate_bh); + dev->vbl_tq.data = dev; #endif /* Before installing handler */ @@ -610,7 +621,8 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS ) drm_device_t *dev = priv->dev; drm_wait_vblank_t vblwait; struct timeval now; - int ret; + int ret = 0; + unsigned int flags; if (!dev->irq) return -EINVAL; @@ -618,15 +630,44 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS ) DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data, sizeof(vblwait) ); - if ( vblwait.type == _DRM_VBLANK_RELATIVE ) { - vblwait.sequence += atomic_read( &dev->vbl_received ); + switch ( vblwait.request.type & ~_DRM_VBLANK_FLAGS_MASK ) { + case _DRM_VBLANK_RELATIVE: + vblwait.request.sequence += atomic_read( &dev->vbl_received ); + case _DRM_VBLANK_ABSOLUTE: + break; + default: + return -EINVAL; } - ret = DRM(vblank_wait)( dev, &vblwait.sequence ); + flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK; + + if ( flags & _DRM_VBLANK_SIGNAL ) { + drm_vbl_sig_t *vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) ); + + if ( !vbl_sig ) + return -ENOMEM; - do_gettimeofday( &now ); - vblwait.tval_sec = now.tv_sec; - vblwait.tval_usec = now.tv_usec; + memset( (void *)vbl_sig, 0, sizeof(*vbl_sig) ); + + vbl_sig->sequence = vblwait.request.sequence; + vbl_sig->info.si_signo = vblwait.request.signal; + vbl_sig->task = current; + + vblwait.reply.sequence = atomic_read( &dev->vbl_received ); + + /* Hook signal entry into list */ + down( &dev->vbl_sem ); + + list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head ); + + up( &dev->vbl_sem ); + } else { + ret = DRM(vblank_wait)( dev, &vblwait.request.sequence ); + + do_gettimeofday( &now ); + vblwait.reply.tval_sec = now.tv_sec; + vblwait.reply.tval_usec = now.tv_usec; + } DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait, sizeof(vblwait) ); @@ -634,6 +675,33 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS ) return ret; } +void DRM(vbl_immediate_bh)( void *arg ) +{ + drm_device_t *dev = (drm_device_t *) arg; + struct list_head *entry, *tmp; + drm_vbl_sig_t *vbl_sig; + unsigned int vbl_seq = atomic_read( &dev->vbl_received ); + + down( &dev->vbl_sem ); + + list_for_each_safe( entry, tmp, &dev->vbl_sigs.head ) { + + vbl_sig = (drm_vbl_sig_t *) entry; + + if ( ( vbl_seq + ~vbl_sig->sequence + 1 ) <= (1<<23) ) { + + vbl_sig->info.si_code = atomic_read( &dev->vbl_received ); + send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task ); + + list_del( entry ); + + DRM_FREE( entry ); + } + } + + up( &dev->vbl_sem ); +} + #endif /* __HAVE_VBL_IRQ */ #else |