sys/net/iflib.c

314 /* this should really scale with ring size - this is a fairly arbitrary value */
541  * Only allow a single packet to take up most 1/nth of the tx ring
824 	struct netmap_ring *ring = kring->ring;
837 	 * IMPORTANT: we must leave one free slot in the ring,
843 			struct netmap_slot *slot = &ring->slot[nm_i];
893  * Reconcile kernel and user view of the transmit ring.
911 	struct netmap_ring *ring = kring->ring;
912 	u_int nm_i;	/* index into the netmap ring */
913 	u_int nic_i;	/* index into the NIC ring */
921 	 * them every half ring, or where NS_REPORT is set
935 	 * nm_i is the current index in the netmap ring,
936 	 * nic_i is the corresponding index in the NIC ring.
939 	 * iterate over the netmap ring, fetch length and update
940 	 * the corresponding slot in the NIC ring. Some drivers also
949 	 * but only a few times per ring or when NS_REPORT is set.
962 		__builtin_prefetch(&ring->slot[nm_i]);
968 			struct netmap_slot *slot = &ring->slot[nm_i];
985 			/* Fill the slot in the NIC ring. */
989 			__builtin_prefetch(&ring->slot[nm_i + 1]);
1010 		/* synchronize the NIC ring */
1031  * Reconcile kernel and user view of the receive ring.
1047 	struct netmap_ring *ring = kring->ring;
1048 	uint32_t nm_i;	/* index into the netmap ring */
1049 	uint32_t nic_i;	/* index into the NIC ring */
1073 	 * nm_i is the index of the next free slot in the netmap ring,
1074 	 * nic_i is the index of the next received packet in the NIC ring,
1076 	 * in netmap mode. For the receive ring we have
1083 	 * rxr->next_check is set to 0 on a ring reinit
1102 				ring->slot[nm_i].len = error ? 0 : ri.iri_len - crclen;
1103 				ring->slot[nm_i].flags = 0;
1126 	 * As usual nm_i is the index in the netmap ring,
1127 	 * nic_i is the index in the NIC ring, and
1176 		 * the physical buffer address in the NIC ring.
2043  *  Initialize a receive ring and its buffers.
2085  *  Free receive ring data structures
2773 iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring, qidx_t in_use)
2780 	if (ring || txq->ift_db_pending >= max) {
3457 				 * there won't be space on the ring to save a pointer to each
3560 	bool do_prefetch, ring, rang;
3638 	ring = rang ? false  : (iflib_min_tx_latency | err) || (TXQ_AVAIL(txq) < MAX_TX_DESC(ctx));
3639 	iflib_txd_db_check(ctx, txq, ring, txq->ift_in_use);
4877 	/* Allocate the TX ring struct memory */
4881 		device_printf(dev, "Unable to allocate TX ring memory\n");
4890 		device_printf(dev, "Unable to allocate RX ring memory\n");
4996 		/* Allocate receive buffers for the ring*/
6020 				0, mp_ring_state_handler, "A", "soft ring state");