/* Needs the lock as it touches the ring.
*/
int i830_irq_emit( 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_i830_private_t *dev_priv = dev->dev_private;
drm_i830_irq_emit_t emit;
int result;
if(!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("i830_irq_emit called without lock held\n");
return -EINVAL;
}
if ( !dev_priv ) {
DRM_ERROR( "%s called with no initialization\n", __FUNCTION__ );
return -EINVAL;
}
if (copy_from_user( &emit, (drm_i830_irq_emit_t __user *)arg, sizeof(emit) ))
return -EFAULT;
result = i830_emit_irq( dev );
if ( copy_to_user( emit.irq_seq, &result, sizeof(int) ) ) {
DRM_ERROR( "copy_to_user\n" );
return -EFAULT;
}
return 0;
}
void
via_release_futex(drm_via_private_t *dev_priv, int context)
{
unsigned int i;
volatile int *lock;
for (i=0; i < VIA_NR_XVMC_LOCKS; ++i) {
lock = (int *) XVMCLOCKPTR(dev_priv->sarea_priv, i);
if ( (_DRM_LOCKING_CONTEXT( *lock ) == context)) {
if (_DRM_LOCK_IS_HELD( *lock ) && (*lock & _DRM_LOCK_CONT)) {
DRM_WAKEUP( &(dev_priv->decoder_queue[i]));
}
*lock = 0;
}
}
}
int i810_release(struct inode *inode, struct file *filp)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
int retcode = 0;
lock_kernel();
dev = priv->dev;
DRM_DEBUG("pid = %d, device = 0x%x, open_count = %d\n",
current->pid, dev->device, dev->open_count);
if (dev->lock.hw_lock && _DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)
&& dev->lock.pid == current->pid) {
i810_reclaim_buffers(dev, priv->pid);
DRM_ERROR("Process %d dead, freeing lock for context %d\n",
current->pid,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
drm_lock_free(dev,
&dev->lock.hw_lock->lock,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
/* FIXME: may require heavy-handed reset of
hardware at this point, possibly
processed via a callback to the X
server. */
} else if (dev->lock.hw_lock) {
/* The lock is required to reclaim buffers */
DECLARE_WAITQUEUE(entry, current);
add_wait_queue(&dev->lock.lock_queue, &entry);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if (!dev->lock.hw_lock) {
/* Device has been unregistered */
retcode = -EINTR;
break;
}
if (drm_lock_take(&dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT)) {
dev->lock.pid = priv->pid;
dev->lock.lock_time = jiffies;
atomic_inc(&dev->total_locks);
break; /* Got lock */
}
/* Contention */
atomic_inc(&dev->total_sleeps);
schedule();
if (signal_pending(current)) {
retcode = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev->lock.lock_queue, &entry);
if(!retcode) {
i810_reclaim_buffers(dev, priv->pid);
drm_lock_free(dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT);
}
}
drm_fasync(-1, filp, 0);
down(&dev->struct_sem);
if (priv->prev) priv->prev->next = priv->next;
else dev->file_first = priv->next;
if (priv->next) priv->next->prev = priv->prev;
else dev->file_last = priv->prev;
up(&dev->struct_sem);
drm_free(priv, sizeof(*priv), DRM_MEM_FILES);
#if LINUX_VERSION_CODE < 0x020333
MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
#endif
atomic_inc(&dev->total_close);
spin_lock(&dev->count_lock);
if (!--dev->open_count) {
if (atomic_read(&dev->ioctl_count) || dev->blocked) {
DRM_ERROR("Device busy: %d %d\n",
atomic_read(&dev->ioctl_count),
dev->blocked);
spin_unlock(&dev->count_lock);
unlock_kernel();
return -EBUSY;
}
spin_unlock(&dev->count_lock);
unlock_kernel();
return i810_takedown(dev);
}
spin_unlock(&dev->count_lock);
unlock_kernel();
return retcode;
}
/* Only called by gamma_dma_schedule. */
static int gamma_do_dma(drm_device_t *dev, int locked)
{
unsigned long address;
unsigned long length;
drm_buf_t *buf;
int retcode = 0;
drm_device_dma_t *dma = dev->dma;
#if DRM_DMA_HISTOGRAM
cycles_t dma_start, dma_stop;
#endif
if (test_and_set_bit(0, &dev->dma_flag)) return -EBUSY;
#if DRM_DMA_HISTOGRAM
dma_start = get_cycles();
#endif
if (!dma->next_buffer) {
DRM_ERROR("No next_buffer\n");
clear_bit(0, &dev->dma_flag);
return -EINVAL;
}
buf = dma->next_buffer;
address = (unsigned long)buf->address;
length = buf->used;
DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
buf->context, buf->idx, length);
if (buf->list == DRM_LIST_RECLAIM) {
gamma_clear_next_buffer(dev);
gamma_free_buffer(dev, buf);
clear_bit(0, &dev->dma_flag);
return -EINVAL;
}
if (!length) {
DRM_ERROR("0 length buffer\n");
gamma_clear_next_buffer(dev);
gamma_free_buffer(dev, buf);
clear_bit(0, &dev->dma_flag);
return 0;
}
if (!gamma_dma_is_ready(dev)) {
clear_bit(0, &dev->dma_flag);
return -EBUSY;
}
if (buf->while_locked) {
if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
DRM_ERROR("Dispatching buffer %d from pid %d"
" \"while locked\", but no lock held\n",
buf->idx, buf->pid);
}
} else {
if (!locked && !gamma_lock_take(&dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT)) {
clear_bit(0, &dev->dma_flag);
return -EBUSY;
}
}
if (dev->last_context != buf->context
&& !(dev->queuelist[buf->context]->flags
& _DRM_CONTEXT_PRESERVED)) {
/* PRE: dev->last_context != buf->context */
if (DRM(context_switch)(dev, dev->last_context,
buf->context)) {
DRM(clear_next_buffer)(dev);
DRM(free_buffer)(dev, buf);
}
retcode = -EBUSY;
goto cleanup;
/* POST: we will wait for the context
switch and will dispatch on a later call
when dev->last_context == buf->context.
NOTE WE HOLD THE LOCK THROUGHOUT THIS
TIME! */
}
gamma_clear_next_buffer(dev);
buf->pending = 1;
buf->waiting = 0;
buf->list = DRM_LIST_PEND;
#if DRM_DMA_HISTOGRAM
buf->time_dispatched = get_cycles();
#endif
gamma_dma_dispatch(dev, address, length);
gamma_free_buffer(dev, dma->this_buffer);
dma->this_buffer = buf;
atomic_inc(&dev->counts[7]); /* _DRM_STAT_DMA */
atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
if (!buf->while_locked && !dev->context_flag && !locked) {
if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT)) {
DRM_ERROR("\n");
}
}
cleanup:
clear_bit(0, &dev->dma_flag);
#if DRM_DMA_HISTOGRAM
dma_stop = get_cycles();
atomic_inc(&dev->histo.dma[gamma_histogram_slot(dma_stop - dma_start)]);
#endif
return retcode;
}
/**
* Release file.
*
* \param inode device inode
* \param file_priv DRM file private.
* \return zero on success or a negative number on failure.
*
* If the hardware lock is held then free it, and take it again for the kernel
* context since it's necessary to reclaim buffers. Unlink the file private
* data from its list and free it. Decreases the open count and if it reaches
* zero calls drm_lastclose().
*/
#if 0 /* old drm_release equivalent from DragonFly */
void drm_cdevpriv_dtor(void *cd)
{
struct drm_file *file_priv = cd;
struct drm_device *dev = file_priv->dev;
int retcode = 0;
DRM_DEBUG("open_count = %d\n", dev->open_count);
DRM_LOCK(dev);
if (dev->driver->preclose != NULL)
dev->driver->preclose(dev, file_priv);
/* ========================================================
* Begin inline drm_release
*/
DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
DRM_CURRENTPID, (long)dev->dev, dev->open_count);
if (dev->driver->driver_features & DRIVER_GEM)
drm_gem_release(dev, file_priv);
if (dev->primary->master->lock.hw_lock
&& _DRM_LOCK_IS_HELD(dev->primary->master->lock.hw_lock->lock)
&& dev->primary->master->lock.file_priv == file_priv) {
DRM_DEBUG("Process %d dead, freeing lock for context %d\n",
DRM_CURRENTPID,
_DRM_LOCKING_CONTEXT(dev->primary->master->lock.hw_lock->lock));
if (dev->driver->reclaim_buffers_locked != NULL)
dev->driver->reclaim_buffers_locked(dev, file_priv);
drm_lock_free(&dev->primary->master->lock,
_DRM_LOCKING_CONTEXT(dev->primary->master->lock.hw_lock->lock));
/* FIXME: may require heavy-handed reset of
hardware at this point, possibly
processed via a callback to the X
server. */
} else if (dev->driver->reclaim_buffers_locked != NULL &&
dev->primary->master->lock.hw_lock != NULL) {
/* The lock is required to reclaim buffers */
for (;;) {
if (!dev->primary->master->lock.hw_lock) {
/* Device has been unregistered */
retcode = EINTR;
break;
}
if (drm_lock_take(&dev->primary->master->lock, DRM_KERNEL_CONTEXT)) {
dev->primary->master->lock.file_priv = file_priv;
dev->primary->master->lock.lock_time = jiffies;
atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
break; /* Got lock */
}
/* Contention */
retcode = DRM_LOCK_SLEEP(dev, &dev->primary->master->lock.lock_queue,
PCATCH, "drmlk2", 0);
if (retcode)
break;
}
if (retcode == 0) {
dev->driver->reclaim_buffers_locked(dev, file_priv);
drm_lock_free(&dev->primary->master->lock, DRM_KERNEL_CONTEXT);
}
}
if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
!dev->driver->reclaim_buffers_locked)
drm_reclaim_buffers(dev, file_priv);
funsetown(&dev->buf_sigio);
if (dev->driver->postclose != NULL)
dev->driver->postclose(dev, file_priv);
list_del(&file_priv->lhead);
/* ========================================================
* End inline drm_release
*/
atomic_inc(&dev->counts[_DRM_STAT_CLOSES]);
device_unbusy(dev->dev);
if (--dev->open_count == 0) {
retcode = drm_lastclose(dev);
}
DRM_UNLOCK(dev);
}
