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// SPDX-License-Identifier: GPL-2.0-or-later
#include <net/netdev_queues.h>
/**
* netdev_queue_get_dma_dev() - get dma device for zero-copy operations
* @dev: net_device
* @idx: queue index
*
* Get dma device for zero-copy operations to be used for this queue.
* When such device is not available or valid, the function will return NULL.
*
* Return: Device or NULL on error
*/
struct device *netdev_queue_get_dma_dev(struct net_device *dev, int idx)
{
const struct netdev_queue_mgmt_ops *queue_ops = dev->queue_mgmt_ops;
struct device *dma_dev;
if (queue_ops && queue_ops->ndo_queue_get_dma_dev)
dma_dev = queue_ops->ndo_queue_get_dma_dev(dev, idx);
else
dma_dev = dev->dev.parent;
return dma_dev && dma_dev->dma_mask ? dma_dev : NULL;
}
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