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-rw-r--r--linux-core/drmP.h1
-rw-r--r--linux-core/drm_dma.c54
-rw-r--r--linux/drmP.h1
-rw-r--r--linux/drm_dma.h54
4 files changed, 82 insertions, 28 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 004f9637..01045037 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -592,6 +592,7 @@ typedef struct drm_device {
atomic_t vbl_received;
spinlock_t vbl_lock;
drm_vbl_sig_t vbl_sigs;
+ unsigned int vbl_pending;
#endif
cycles_t ctx_start;
cycles_t lck_start;
diff --git a/linux-core/drm_dma.c b/linux-core/drm_dma.c
index 46393a5d..33af34be 100644
--- a/linux-core/drm_dma.c
+++ b/linux-core/drm_dma.c
@@ -544,6 +544,8 @@ int DRM(irq_install)( drm_device_t *dev, int irq )
spin_lock_init( &dev->vbl_lock );
INIT_LIST_HEAD( &dev->vbl_sigs.head );
+
+ dev->vbl_pending = 0;
#endif
/* Before installing handler */
@@ -636,10 +638,38 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
if ( flags & _DRM_VBLANK_SIGNAL ) {
unsigned long irqflags;
- drm_vbl_sig_t *vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) );
+ drm_vbl_sig_t *vbl_sig;
+
+ vblwait.reply.sequence = atomic_read( &dev->vbl_received );
+
+ spin_lock_irqsave( &dev->vbl_lock, irqflags );
+
+ /* Check if this task has already scheduled the same signal
+ * for the same vblank sequence number; nothing to be done in
+ * that case
+ */
+ list_for_each( ( (struct list_head *) vbl_sig ), &dev->vbl_sigs.head ) {
+ if (vbl_sig->sequence == vblwait.request.sequence
+ && vbl_sig->info.si_signo == vblwait.request.signal
+ && vbl_sig->task == current)
+ {
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ goto done;
+ }
+ }
+
+ if ( dev->vbl_pending >= 100 ) {
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ return -EBUSY;
+ }
+
+ dev->vbl_pending++;
- if ( !vbl_sig )
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+
+ if ( !( vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) ) ) ) {
return -ENOMEM;
+ }
memset( (void *)vbl_sig, 0, sizeof(*vbl_sig) );
@@ -647,9 +677,6 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
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 */
spin_lock_irqsave( &dev->vbl_lock, irqflags );
list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head );
@@ -663,6 +690,7 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
vblwait.reply.tval_usec = now.tv_usec;
}
+done:
DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
sizeof(vblwait) );
@@ -671,25 +699,23 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
void DRM(vbl_send_signals)( drm_device_t *dev )
{
- struct list_head *entry, *tmp;
+ struct list_head *tmp;
drm_vbl_sig_t *vbl_sig;
unsigned int vbl_seq = atomic_read( &dev->vbl_received );
unsigned long flags;
spin_lock_irqsave( &dev->vbl_lock, flags );
- list_for_each_safe( entry, tmp, &dev->vbl_sigs.head ) {
-
- vbl_sig = (drm_vbl_sig_t *) entry;
-
+ list_for_each_safe( ( (struct list_head *) vbl_sig ), tmp, &dev->vbl_sigs.head ) {
if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
-
- vbl_sig->info.si_code = atomic_read( &dev->vbl_received );
+ vbl_sig->info.si_code = vbl_seq;
send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task );
- list_del( entry );
+ list_del( (struct list_head *) vbl_sig );
+
+ DRM_FREE( vbl_sig );
- DRM_FREE( entry );
+ dev->vbl_pending--;
}
}
diff --git a/linux/drmP.h b/linux/drmP.h
index 004f9637..01045037 100644
--- a/linux/drmP.h
+++ b/linux/drmP.h
@@ -592,6 +592,7 @@ typedef struct drm_device {
atomic_t vbl_received;
spinlock_t vbl_lock;
drm_vbl_sig_t vbl_sigs;
+ unsigned int vbl_pending;
#endif
cycles_t ctx_start;
cycles_t lck_start;
diff --git a/linux/drm_dma.h b/linux/drm_dma.h
index 46393a5d..33af34be 100644
--- a/linux/drm_dma.h
+++ b/linux/drm_dma.h
@@ -544,6 +544,8 @@ int DRM(irq_install)( drm_device_t *dev, int irq )
spin_lock_init( &dev->vbl_lock );
INIT_LIST_HEAD( &dev->vbl_sigs.head );
+
+ dev->vbl_pending = 0;
#endif
/* Before installing handler */
@@ -636,10 +638,38 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
if ( flags & _DRM_VBLANK_SIGNAL ) {
unsigned long irqflags;
- drm_vbl_sig_t *vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) );
+ drm_vbl_sig_t *vbl_sig;
+
+ vblwait.reply.sequence = atomic_read( &dev->vbl_received );
+
+ spin_lock_irqsave( &dev->vbl_lock, irqflags );
+
+ /* Check if this task has already scheduled the same signal
+ * for the same vblank sequence number; nothing to be done in
+ * that case
+ */
+ list_for_each( ( (struct list_head *) vbl_sig ), &dev->vbl_sigs.head ) {
+ if (vbl_sig->sequence == vblwait.request.sequence
+ && vbl_sig->info.si_signo == vblwait.request.signal
+ && vbl_sig->task == current)
+ {
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ goto done;
+ }
+ }
+
+ if ( dev->vbl_pending >= 100 ) {
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+ return -EBUSY;
+ }
+
+ dev->vbl_pending++;
- if ( !vbl_sig )
+ spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
+
+ if ( !( vbl_sig = DRM_MALLOC( sizeof( drm_vbl_sig_t ) ) ) ) {
return -ENOMEM;
+ }
memset( (void *)vbl_sig, 0, sizeof(*vbl_sig) );
@@ -647,9 +677,6 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
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 */
spin_lock_irqsave( &dev->vbl_lock, irqflags );
list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head );
@@ -663,6 +690,7 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
vblwait.reply.tval_usec = now.tv_usec;
}
+done:
DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
sizeof(vblwait) );
@@ -671,25 +699,23 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
void DRM(vbl_send_signals)( drm_device_t *dev )
{
- struct list_head *entry, *tmp;
+ struct list_head *tmp;
drm_vbl_sig_t *vbl_sig;
unsigned int vbl_seq = atomic_read( &dev->vbl_received );
unsigned long flags;
spin_lock_irqsave( &dev->vbl_lock, flags );
- list_for_each_safe( entry, tmp, &dev->vbl_sigs.head ) {
-
- vbl_sig = (drm_vbl_sig_t *) entry;
-
+ list_for_each_safe( ( (struct list_head *) vbl_sig ), tmp, &dev->vbl_sigs.head ) {
if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
-
- vbl_sig->info.si_code = atomic_read( &dev->vbl_received );
+ vbl_sig->info.si_code = vbl_seq;
send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task );
- list_del( entry );
+ list_del( (struct list_head *) vbl_sig );
+
+ DRM_FREE( vbl_sig );
- DRM_FREE( entry );
+ dev->vbl_pending--;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 18:36:28 +0000