예제 #1
0
int drm_rmctx(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_ctx_t	ctx;
	drm_queue_t	*q;
	drm_buf_t	*buf;

	if (copy_from_user(&ctx, (drm_ctx_t *)arg, sizeof(ctx)))
		return -EFAULT;
	DRM_DEBUG("%d\n", ctx.handle);
	
	if (ctx.handle >= dev->queue_count) return -EINVAL;
	q = dev->queuelist[ctx.handle];
	
	atomic_inc(&q->use_count);
	if (atomic_read(&q->use_count) == 1) {
				/* No longer in use */
		atomic_dec(&q->use_count);
		return -EINVAL;
	}
	
	atomic_inc(&q->finalization); /* Mark queue in finalization state */
	atomic_sub(2, &q->use_count); /* Mark queue as unused (pending
					 finalization) */

	while (test_and_set_bit(0, &dev->interrupt_flag)) {
		schedule();
		if (signal_pending(current)) {
			clear_bit(0, &dev->interrupt_flag);
			return -EINTR;
		}
	}
				/* Remove queued buffers */
	while ((buf = drm_waitlist_get(&q->waitlist))) {
		drm_free_buffer(dev, buf);
	}
	clear_bit(0, &dev->interrupt_flag);
	
				/* Wakeup blocked processes */
	wake_up_interruptible(&q->read_queue);
	wake_up_interruptible(&q->write_queue);
	wake_up_interruptible(&q->flush_queue);
	
				/* Finalization over.  Queue is made
				   available when both use_count and
				   finalization become 0, which won't
				   happen until all the waiting processes
				   stop waiting. */
	atomic_dec(&q->finalization);
	return 0;
}
예제 #2
0
void drm_reclaim_buffers(drm_device_t *dev, pid_t pid)
{
	drm_device_dma_t *dma = dev->dma;
	int		 i;

	if (!dma) return;
	for (i = 0; i < dma->buf_count; i++) {
		if (dma->buflist[i]->pid == pid) {
			switch (dma->buflist[i]->list) {
			case DRM_LIST_NONE:
				drm_free_buffer(dev, dma->buflist[i]);
				break;
			case DRM_LIST_WAIT:
				dma->buflist[i]->list = DRM_LIST_RECLAIM;
				break;
			default:
				/* Buffer already on hardware. */
				break;
			}
		}
	}
}
예제 #3
0
int mga_freebufs(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_device_dma_t *dma	 = dev->dma;
	drm_buf_free_t	 request;
	int		 i;
	int		 idx;
	drm_buf_t	 *buf;

	if (!dma) return -EINVAL;

	if (copy_from_user(&request,
			   (drm_buf_free_t *)arg,
			   sizeof(request)))
		return -EFAULT;

	for (i = 0; i < request.count; i++) {
		if (copy_from_user(&idx,
				   &request.list[i],
				   sizeof(idx)))
			return -EFAULT;
		if (idx < 0 || idx >= dma->buf_count) {
			DRM_ERROR("Index %d (of %d max)\n",
				  idx, dma->buf_count - 1);
			return -EINVAL;
		}
		buf = dma->buflist[idx];
		if (buf->pid != current->pid) {
			DRM_ERROR("Process %d freeing buffer owned by %d\n",
				  current->pid, buf->pid);
			return -EINVAL;
		}
		drm_free_buffer(dev, buf);
	}
	
	return 0;
}
예제 #4
0
파일: drm_dma.c 프로젝트: 03199618/linux
/**
 * Reclaim the buffers.
 *
 * \param file_priv DRM file private.
 *
 * Frees each buffer associated with \p file_priv not already on the hardware.
 */
void drm_core_reclaim_buffers(struct drm_device *dev,
			      struct drm_file *file_priv)
{
	struct drm_device_dma *dma = dev->dma;
	int i;

	if (!dma)
		return;
	for (i = 0; i < dma->buf_count; i++) {
		if (dma->buflist[i]->file_priv == file_priv) {
			switch (dma->buflist[i]->list) {
			case DRM_LIST_NONE:
				drm_free_buffer(dev, dma->buflist[i]);
				break;
			case DRM_LIST_WAIT:
				dma->buflist[i]->list = DRM_LIST_RECLAIM;
				break;
			default:
				/* Buffer already on hardware. */
				break;
			}
		}
	}
}