static long mport_cdev_ioctl()

in devices/rio_mport_cdev.c [2063:2135]

• 70 lines of code
• 28 McCabe index (conditional complexity)

static long mport_cdev_ioctl(struct file *filp,
		unsigned int cmd, unsigned long arg)
{
	int err = -EINVAL;
	struct mport_cdev_priv *data = filp->private_data;
	struct mport_dev *md = data->md;

	if (atomic_read(&md->active) == 0)
		return -ENODEV;

	switch (cmd) {
	case RIO_MPORT_MAINT_READ_LOCAL:
		return rio_mport_maint_rd(data, (void __user *)arg, 1);
	case RIO_MPORT_MAINT_WRITE_LOCAL:
		return rio_mport_maint_wr(data, (void __user *)arg, 1);
	case RIO_MPORT_MAINT_READ_REMOTE:
		return rio_mport_maint_rd(data, (void __user *)arg, 0);
	case RIO_MPORT_MAINT_WRITE_REMOTE:
		return rio_mport_maint_wr(data, (void __user *)arg, 0);
	case RIO_MPORT_MAINT_HDID_SET:
		return maint_hdid_set(data, (void __user *)arg);
	case RIO_MPORT_MAINT_COMPTAG_SET:
		return maint_comptag_set(data, (void __user *)arg);
	case RIO_MPORT_MAINT_PORT_IDX_GET:
		return maint_port_idx_get(data, (void __user *)arg);
	case RIO_MPORT_GET_PROPERTIES:
		md->properties.hdid = md->mport->host_deviceid;
		if (copy_to_user((void __user *)arg, &(md->properties),
				 sizeof(md->properties)))
			return -EFAULT;
		return 0;
	case RIO_ENABLE_DOORBELL_RANGE:
		return rio_mport_add_db_filter(data, (void __user *)arg);
	case RIO_DISABLE_DOORBELL_RANGE:
		return rio_mport_remove_db_filter(data, (void __user *)arg);
	case RIO_ENABLE_PORTWRITE_RANGE:
		return rio_mport_add_pw_filter(data, (void __user *)arg);
	case RIO_DISABLE_PORTWRITE_RANGE:
		return rio_mport_remove_pw_filter(data, (void __user *)arg);
	case RIO_SET_EVENT_MASK:
		data->event_mask = (u32)arg;
		return 0;
	case RIO_GET_EVENT_MASK:
		if (copy_to_user((void __user *)arg, &data->event_mask,
				    sizeof(u32)))
			return -EFAULT;
		return 0;
	case RIO_MAP_OUTBOUND:
		return rio_mport_obw_map(filp, (void __user *)arg);
	case RIO_MAP_INBOUND:
		return rio_mport_map_inbound(filp, (void __user *)arg);
	case RIO_UNMAP_OUTBOUND:
		return rio_mport_obw_free(filp, (void __user *)arg);
	case RIO_UNMAP_INBOUND:
		return rio_mport_inbound_free(filp, (void __user *)arg);
	case RIO_ALLOC_DMA:
		return rio_mport_alloc_dma(filp, (void __user *)arg);
	case RIO_FREE_DMA:
		return rio_mport_free_dma(filp, (void __user *)arg);
	case RIO_WAIT_FOR_ASYNC:
		return rio_mport_wait_for_async_dma(filp, (void __user *)arg);
	case RIO_TRANSFER:
		return rio_mport_transfer_ioctl(filp, (void __user *)arg);
	case RIO_DEV_ADD:
		return rio_mport_add_riodev(data, (void __user *)arg);
	case RIO_DEV_DEL:
		return rio_mport_del_riodev(data, (void __user *)arg);
	default:
		break;
	}

	return err;
}