Function inline_tx_mbuf

dpdk/drivers/net/cxgbe/sge.c:1287–1302

* inline_tx_mbuf: inline a packet's data into TX descriptors * @q: the TX queue where the packet will be inlined * @from: pointer to data portion of packet * @to: pointer after cpl where data has to be inlined * @len: length of data to inline * * Inline a packet's contents directly to TX descriptors, starting at * the given position within the TX DMA ring. * Most of the complexity of this

 * in the middle of the packet we want to inline.
 */
static void inline_tx_mbuf(const struct sge_txq *q, caddr_t from, caddr_t *to,
			   int len)
{
	int left = RTE_PTR_DIFF(q->stat, *to);

	if (likely((uintptr_t)*to + len <= (uintptr_t)q->stat)) {
		rte_memcpy(*to, from, len);
		*to = RTE_PTR_ADD(*to, len);
	} else {
		rte_memcpy(*to, from, left);
		from = RTE_PTR_ADD(from, left);
		left = len - left;
		rte_memcpy((void *)q->desc, from, left);
		*to = RTE_PTR_ADD((void *)q->desc, left);
	}
}

/**
 * ctrl_xmit - send a packet through an SGE control Tx queue