return ixgbe_recv_pkts_lro(rx_queue, rx_pkts, nb_pkts, true);
}
-uint16_t
-ixgbe_recv_scattered_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
- uint16_t nb_pkts)
-{
- struct ixgbe_rx_queue *rxq;
- volatile union ixgbe_adv_rx_desc *rx_ring;
- volatile union ixgbe_adv_rx_desc *rxdp;
- struct ixgbe_rx_entry *sw_ring;
- struct ixgbe_rx_entry *rxe;
- struct rte_mbuf *first_seg;
- struct rte_mbuf *last_seg;
- struct rte_mbuf *rxm;
- struct rte_mbuf *nmb;
- union ixgbe_adv_rx_desc rxd;
- uint64_t dma; /* Physical address of mbuf data buffer */
- uint32_t staterr;
- uint16_t rx_id;
- uint16_t nb_rx;
- uint16_t nb_hold;
- uint16_t data_len;
-
- nb_rx = 0;
- nb_hold = 0;
- rxq = rx_queue;
- rx_id = rxq->rx_tail;
- rx_ring = rxq->rx_ring;
- sw_ring = rxq->sw_ring;
-
- /*
- * Retrieve RX context of current packet, if any.
- */
- first_seg = rxq->pkt_first_seg;
- last_seg = rxq->pkt_last_seg;
-
- while (nb_rx < nb_pkts) {
- next_desc:
- /*
- * The order of operations here is important as the DD status
- * bit must not be read after any other descriptor fields.
- * rx_ring and rxdp are pointing to volatile data so the order
- * of accesses cannot be reordered by the compiler. If they were
- * not volatile, they could be reordered which could lead to
- * using invalid descriptor fields when read from rxd.
- */
- rxdp = &rx_ring[rx_id];
- staterr = rxdp->wb.upper.status_error;
- if (! (staterr & rte_cpu_to_le_32(IXGBE_RXDADV_STAT_DD)))
- break;
- rxd = *rxdp;
-
- /*
- * Descriptor done.
- *
- * Allocate a new mbuf to replenish the RX ring descriptor.
- * If the allocation fails:
- * - arrange for that RX descriptor to be the first one
- * being parsed the next time the receive function is
- * invoked [on the same queue].
- *
- * - Stop parsing the RX ring and return immediately.
- *
- * This policy does not drop the packet received in the RX
- * descriptor for which the allocation of a new mbuf failed.
- * Thus, it allows that packet to be later retrieved if
- * mbuf have been freed in the mean time.
- * As a side effect, holding RX descriptors instead of
- * systematically giving them back to the NIC may lead to
- * RX ring exhaustion situations.
- * However, the NIC can gracefully prevent such situations
- * to happen by sending specific "back-pressure" flow control
- * frames to its peer(s).
- */
- PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u "
- "staterr=0x%x data_len=%u",
- (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
- (unsigned) rx_id, (unsigned) staterr,
- (unsigned) rte_le_to_cpu_16(rxd.wb.upper.length));
-
- nmb = rte_rxmbuf_alloc(rxq->mb_pool);
- if (nmb == NULL) {
- PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
- "queue_id=%u", (unsigned) rxq->port_id,
- (unsigned) rxq->queue_id);
- rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
- break;
- }
-
- nb_hold++;
- rxe = &sw_ring[rx_id];
- rx_id++;
- if (rx_id == rxq->nb_rx_desc)
- rx_id = 0;
-
- /* Prefetch next mbuf while processing current one. */
- rte_ixgbe_prefetch(sw_ring[rx_id].mbuf);
-
- /*
- * When next RX descriptor is on a cache-line boundary,
- * prefetch the next 4 RX descriptors and the next 8 pointers
- * to mbufs.
- */
- if ((rx_id & 0x3) == 0) {
- rte_ixgbe_prefetch(&rx_ring[rx_id]);
- rte_ixgbe_prefetch(&sw_ring[rx_id]);
- }
-
- /*
- * Update RX descriptor with the physical address of the new
- * data buffer of the new allocated mbuf.
- */
- rxm = rxe->mbuf;
- rxe->mbuf = nmb;
- dma = rte_cpu_to_le_64(RTE_MBUF_DATA_DMA_ADDR_DEFAULT(nmb));
- rxdp->read.hdr_addr = dma;
- rxdp->read.pkt_addr = dma;
-
- /*
- * Set data length & data buffer address of mbuf.
- */
- data_len = rte_le_to_cpu_16(rxd.wb.upper.length);
- rxm->data_len = data_len;
- rxm->data_off = RTE_PKTMBUF_HEADROOM;
-
- /*
- * If this is the first buffer of the received packet,
- * set the pointer to the first mbuf of the packet and
- * initialize its context.
- * Otherwise, update the total length and the number of segments
- * of the current scattered packet, and update the pointer to
- * the last mbuf of the current packet.
- */
- if (first_seg == NULL) {
- first_seg = rxm;
- first_seg->pkt_len = data_len;
- first_seg->nb_segs = 1;
- } else {
- first_seg->pkt_len = (uint16_t)(first_seg->pkt_len
- + data_len);
- first_seg->nb_segs++;
- last_seg->next = rxm;
- }
-
- /*
- * If this is not the last buffer of the received packet,
- * update the pointer to the last mbuf of the current scattered
- * packet and continue to parse the RX ring.
- */
- if (! (staterr & IXGBE_RXDADV_STAT_EOP)) {
- last_seg = rxm;
- goto next_desc;
- }
-
- /*
- * This is the last buffer of the received packet.
- * If the CRC is not stripped by the hardware:
- * - Subtract the CRC length from the total packet length.
- * - If the last buffer only contains the whole CRC or a part
- * of it, free the mbuf associated to the last buffer.
- * If part of the CRC is also contained in the previous
- * mbuf, subtract the length of that CRC part from the
- * data length of the previous mbuf.
- */
- rxm->next = NULL;
- if (unlikely(rxq->crc_len > 0)) {
- first_seg->pkt_len -= ETHER_CRC_LEN;
- if (data_len <= ETHER_CRC_LEN) {
- rte_pktmbuf_free_seg(rxm);
- first_seg->nb_segs--;
- last_seg->data_len = (uint16_t)
- (last_seg->data_len -
- (ETHER_CRC_LEN - data_len));
- last_seg->next = NULL;
- } else
- rxm->data_len =
- (uint16_t) (data_len - ETHER_CRC_LEN);
- }
-
- /* Initialize the first mbuf of the returned packet */
- ixgbe_fill_cluster_head_buf(first_seg, &rxd, rxq->port_id,
- staterr);
-
- /* Prefetch data of first segment, if configured to do so. */
- rte_packet_prefetch((char *)first_seg->buf_addr +
- first_seg->data_off);
-
- /*
- * Store the mbuf address into the next entry of the array
- * of returned packets.
- */
- rx_pkts[nb_rx++] = first_seg;
-
- /*
- * Setup receipt context for a new packet.
- */
- first_seg = NULL;
- }
-
- /*
- * Record index of the next RX descriptor to probe.
- */
- rxq->rx_tail = rx_id;
-
- /*
- * Save receive context.
- */
- rxq->pkt_first_seg = first_seg;
- rxq->pkt_last_seg = last_seg;
-
- /*
- * If the number of free RX descriptors is greater than the RX free
- * threshold of the queue, advance the Receive Descriptor Tail (RDT)
- * register.
- * Update the RDT with the value of the last processed RX descriptor
- * minus 1, to guarantee that the RDT register is never equal to the
- * RDH register, which creates a "full" ring situtation from the
- * hardware point of view...
- */
- nb_hold = (uint16_t) (nb_hold + rxq->nb_rx_hold);
- if (nb_hold > rxq->rx_free_thresh) {
- PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_tail=%u "
- "nb_hold=%u nb_rx=%u",
- (unsigned) rxq->port_id, (unsigned) rxq->queue_id,
- (unsigned) rx_id, (unsigned) nb_hold,
- (unsigned) nb_rx);
- rx_id = (uint16_t) ((rx_id == 0) ?
- (rxq->nb_rx_desc - 1) : (rx_id - 1));
- IXGBE_PCI_REG_WRITE(rxq->rdt_reg_addr, rx_id);
- nb_hold = 0;
- }
- rxq->nb_rx_hold = nb_hold;
- return (nb_rx);
-}
-
/*********************************************************************
*
* Queue management functions
uint16_t len;
struct ixgbe_adapter *adapter =
(struct ixgbe_adapter *)dev->data->dev_private;
- struct rte_eth_dev_info dev_info = { 0 };
- struct rte_eth_rxmode *dev_rx_mode = &dev->data->dev_conf.rxmode;
- bool rsc_requested = false;
-
- dev->dev_ops->dev_infos_get(dev, &dev_info);
- if ((dev_info.rx_offload_capa & DEV_RX_OFFLOAD_TCP_LRO) &&
- dev_rx_mode->enable_lro)
- rsc_requested = true;
PMD_INIT_FUNC_TRACE();
hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
return (-ENOMEM);
}
- if (rsc_requested) {
- rxq->sw_sc_ring =
- rte_zmalloc_socket("rxq->sw_sc_ring",
- sizeof(struct ixgbe_scattered_rx_entry) * len,
- RTE_CACHE_LINE_SIZE, socket_id);
- if (!rxq->sw_sc_ring) {
- ixgbe_rx_queue_release(rxq);
- return (-ENOMEM);
- }
- } else
- rxq->sw_sc_ring = NULL;
+ /*
+ * Always allocate even if it's not going to be needed in order to
+ * simplify the code.
+ *
+ * This ring is used in LRO and Scattered Rx cases and Scattered Rx may
+ * be requested in ixgbe_dev_rx_init(), which is called later from
+ * dev_start() flow.
+ */
+ rxq->sw_sc_ring =
+ rte_zmalloc_socket("rxq->sw_sc_ring",
+ sizeof(struct ixgbe_scattered_rx_entry) * len,
+ RTE_CACHE_LINE_SIZE, socket_id);
+ if (!rxq->sw_sc_ring) {
+ ixgbe_rx_queue_release(rxq);
+ return (-ENOMEM);
+ }
PMD_INIT_LOG(DEBUG, "sw_ring=%p sw_sc_ring=%p hw_ring=%p "
"dma_addr=0x%"PRIx64,
dev->rx_pkt_burst = ixgbe_recv_scattered_pkts_vec;
} else {
- PMD_INIT_LOG(DEBUG, "Using Regualr (non-vector) "
+ PMD_INIT_LOG(DEBUG, "Using Regualr (non-vector, "
+ "single allocation) "
"Scattered Rx callback "
"(port=%d).",
dev->data->port_id);
- dev->rx_pkt_burst = ixgbe_recv_scattered_pkts;
+ dev->rx_pkt_burst = ixgbe_recv_pkts_lro_single_alloc;
}
/*
* Below we set "simple" callbacks according to port/queues parameters.
ixgbe_recv_scattered_pkts_vec;
else
#endif
- dev->rx_pkt_burst = ixgbe_recv_scattered_pkts;
+ dev->rx_pkt_burst =
+ ixgbe_recv_pkts_lro_single_alloc;
}
}
git.droids-corp.org / dpdk.git / commitdiff