#define __NO_VERSION__
#include "drmP.h"
#include <linux/interrupt.h>
#ifndef __HAVE_SHARED_IRQ
#define __HAVE_SHARED_IRQ 0
#endif
#if __HAVE_SHARED_IRQ
#define DRM_IRQ_TYPE SA_SHIRQ
#else
#define DRM_IRQ_TYPE 0
#endif
int DRM(irq_by_busid)(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_irq_busid_t p;
if (copy_from_user(&p, (drm_irq_busid_t *)arg, sizeof(p)))
return -EFAULT;
if ((p.busnum >> 8) != dev->pci_domain ||
(p.busnum & 0xff) != dev->pci_bus ||
p.devnum != dev->pci_slot ||
p.funcnum != dev->pci_func)
return -EINVAL;
p.irq = dev->irq;
DRM_DEBUG("%d:%d:%d => IRQ %d\n",
p.busnum, p.devnum, p.funcnum, p.irq);
if (copy_to_user((drm_irq_busid_t *)arg, &p, sizeof(p)))
return -EFAULT;
return 0;
}
#if __HAVE_IRQ
int DRM(irq_install)( drm_device_t *dev )
{
int ret;
if ( dev->irq == 0 )
return -EINVAL;
down( &dev->struct_sem );
if ( !dev->dev_private ) {
up( &dev->struct_sem );
return -EINVAL;
}
if ( dev->irq_enabled ) {
up( &dev->struct_sem );
return -EBUSY;
}
dev->irq_enabled = 1;
up( &dev->struct_sem );
DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
#if 0
dev->context_flag = 0;
dev->interrupt_flag = 0;
dev->dma_flag = 0;
#endif
#if __HAVE_DMA
dev->dma->next_buffer = NULL;
dev->dma->next_queue = NULL;
dev->dma->this_buffer = NULL;
#endif
#if __HAVE_IRQ_BH
#if !HAS_WORKQUEUE
INIT_LIST_HEAD( &dev->tq.list );
dev->tq.sync = 0;
dev->tq.routine = DRM(irq_immediate_bh);
dev->tq.data = dev;
#else
INIT_WORK(&dev->work, DRM(irq_immediate_bh), dev);
#endif
#endif
#if __HAVE_VBL_IRQ
init_waitqueue_head(&dev->vbl_queue);
spin_lock_init( &dev->vbl_lock );
INIT_LIST_HEAD( &dev->vbl_sigs.head );
dev->vbl_pending = 0;
#endif
DRM(driver_irq_preinstall)(dev);
ret = request_irq( dev->irq, DRM(irq_handler),
DRM_IRQ_TYPE, dev->devname, dev );
if ( ret < 0 ) {
down( &dev->struct_sem );
dev->irq_enabled = 0;
up( &dev->struct_sem );
return ret;
}
DRM(driver_irq_postinstall)(dev);
return 0;
}
int DRM(irq_uninstall)( drm_device_t *dev )
{
int irq_enabled;
down( &dev->struct_sem );
irq_enabled = dev->irq_enabled;
dev->irq_enabled = 0;
up( &dev->struct_sem );
if ( !irq_enabled )
return -EINVAL;
DRM_DEBUG( "%s: irq=%d\n", __FUNCTION__, dev->irq );
DRM(driver_irq_uninstall)( dev );
free_irq( dev->irq, dev );
return 0;
}
int DRM(control)( struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_control_t ctl;
if ( copy_from_user( &ctl, (drm_control_t *)arg, sizeof(ctl) ) )
return -EFAULT;
switch ( ctl.func ) {
case DRM_INST_HANDLER:
if (dev->if_version < DRM_IF_VERSION(1, 2) &&
ctl.irq != dev->irq)
return -EINVAL;
return DRM(irq_install)( dev );
case DRM_UNINST_HANDLER:
return DRM(irq_uninstall)( dev );
default:
return -EINVAL;
}
}
#if __HAVE_VBL_IRQ
int DRM(wait_vblank)( DRM_IOCTL_ARGS )
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_wait_vblank_t vblwait;
struct timeval now;
int ret = 0;
unsigned int flags;
if (!dev->irq)
return -EINVAL;
DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data,
sizeof(vblwait) );
switch ( vblwait.request.type & ~_DRM_VBLANK_FLAGS_MASK ) {
case _DRM_VBLANK_RELATIVE:
vblwait.request.sequence += atomic_read( &dev->vbl_received );
vblwait.request.type &= ~_DRM_VBLANK_RELATIVE;
case _DRM_VBLANK_ABSOLUTE:
break;
default:
return -EINVAL;
}
flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
if ( flags & _DRM_VBLANK_SIGNAL ) {
unsigned long irqflags;
drm_vbl_sig_t *vbl_sig;
vblwait.reply.sequence = atomic_read( &dev->vbl_received );
spin_lock_irqsave( &dev->vbl_lock, irqflags );
list_for_each_entry( vbl_sig, &dev->vbl_sigs.head, 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++;
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) );
vbl_sig->sequence = vblwait.request.sequence;
vbl_sig->info.si_signo = vblwait.request.signal;
vbl_sig->task = current;
spin_lock_irqsave( &dev->vbl_lock, irqflags );
list_add_tail( (struct list_head *) vbl_sig, &dev->vbl_sigs.head );
spin_unlock_irqrestore( &dev->vbl_lock, irqflags );
} 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;
}
done:
DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
sizeof(vblwait) );
return ret;
}
void DRM(vbl_send_signals)( drm_device_t *dev )
{
struct list_head *list, *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( list, tmp, &dev->vbl_sigs.head ) {
vbl_sig = list_entry( list, drm_vbl_sig_t, head );
if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
vbl_sig->info.si_code = vbl_seq;
send_sig_info( vbl_sig->info.si_signo, &vbl_sig->info, vbl_sig->task );
list_del( list );
DRM_FREE( vbl_sig, sizeof(*vbl_sig) );
dev->vbl_pending--;
}
}
spin_unlock_irqrestore( &dev->vbl_lock, flags );
}
#endif
#endif