Function rte_dma_copy

dpdk/lib/dmadev/rte_dmadev.h:834–848

* Enqueue a copy operation onto the virtual DMA channel. * * This queues up a copy operation to be performed by hardware, if the 'flags' * parameter contains RTE_DMA_OP_FLAG_SUBMIT then trigger doorbell to begin * this operation, otherwise do not trigger doorbell. * * @param dev_id * The identifier of the device. * @param vchan * The identifier of virtual DMA channel. * @param src *

 *   - other values < 0 on failure.
 */
static inline int
rte_dma_copy(int16_t dev_id, uint16_t vchan, rte_iova_t src, rte_iova_t dst,
	     uint32_t length, uint64_t flags)
{
	struct rte_dma_fp_object *obj = &rte_dma_fp_objs[dev_id];

#ifdef RTE_DMADEV_DEBUG
	if (!rte_dma_is_valid(dev_id) || length == 0)
		return -EINVAL;
	if (*obj->copy == NULL)
		return -ENOTSUP;
#endif

	return (*obj->copy)(obj->dev_private, vchan, src, dst, length, flags);
}

/**
 * Enqueue a scatter-gather list copy operation onto the virtual DMA channel.