Cross Reference: /src/sys/dev/pci/ixgbe/ixgbe

Lines Matching refs:kring
181  * All information is in the kring.
182  * Userspace wants to send packets up to the one before kring->rhead,
183  * kernel knows kring->nr_hwcur is the first unsent packet.
193 ixgbe_netmap_txsync(struct netmap_kring *kring, int flags)
195 	struct netmap_adapter *na = kring->na;
197 	struct netmap_ring *ring = kring->ring;
201 	u_int const lim = kring->nkr_num_slots - 1;
202 	u_int const head = kring->rhead;
207 	u_int report_frequency = kring->nkr_num_slots >> 1;
211 	struct tx_ring *txr = &sc->tx_rings[kring->ring_id];
225 	 *		nm_i = kring->nr_hwcur
228 	 * 		nm_i == (nic_i + kring->nkr_hwofs) % ring_size
230 	 * In this driver kring->nkr_hwofs >= 0, but for other
235 	 * If we have packets to send (kring->nr_hwcur != kring->rhead)
252 	nm_i = kring->nr_hwcur;
254 		nic_i = netmap_idx_k2n(kring, nm_i);
298 		kring->nr_hwcur = head;
315 	} else if (!nm_kr_txempty(kring)) {
333 		nic_i = (nic_i < kring->nkr_num_slots / 4 ||
334 			 nic_i >= kring->nkr_num_slots*3/4) ?
349 		nic_i = IXGBE_READ_REG(&sc->hw, IXGBE_TDH(kring->ring_id));
350 		if (nic_i >= kring->nkr_num_slots) { /* XXX can it happen ? */
354 			nic_i -= kring->nkr_num_slots;
359 			kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
373  * On call, kring->rhead is the first packet that userspace wants
374  * to keep, and kring->rcur is the wakeup point.
375  * The kernel has previously reported packets up to kring->rtail.
381 ixgbe_netmap_rxsync(struct netmap_kring *kring, int flags)
383 	struct netmap_adapter *na = kring->na;
385 	struct netmap_ring *ring = kring->ring;
389 	u_int const lim = kring->nkr_num_slots - 1;
390 	u_int const head = kring->rhead;
391 	int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
395 	struct rx_ring *rxr = &sc->rx_rings[kring->ring_id];
398 		return netmap_ring_reinit(kring);
413 	 *	nm_i = kring->nr_hwtail (previous)
415 	 *	nm_i == (nic_i + kring->nkr_hwofs) % ring_size
422 		nic_i = rxr->next_to_check; // or also k2n(kring->nr_hwtail)
423 		nm_i = netmap_idx_n2k(kring, nic_i);
445 			kring->nr_hwtail = nm_i;
447 		kring->nr_kflags &= ~NKR_PENDINTR;
452 	 * (kring->nr_hwcur to kring->rhead excluded),
456 	 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
458 	nm_i = kring->nr_hwcur;
460 		nic_i = netmap_idx_k2n(kring, nm_i);
484 		kring->nr_hwcur = head;
499 	return netmap_ring_reinit(kring);
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