return ngbe_decode_ptype(ptid);
}
+/*
+ * LOOK_AHEAD defines how many desc statuses to check beyond the
+ * current descriptor.
+ * It must be a pound define for optimal performance.
+ * Do not change the value of LOOK_AHEAD, as the ngbe_rx_scan_hw_ring
+ * function only works with LOOK_AHEAD=8.
+ */
+#define LOOK_AHEAD 8
+#if (LOOK_AHEAD != 8)
+#error "PMD NGBE: LOOK_AHEAD must be 8\n"
+#endif
+static inline int
+ngbe_rx_scan_hw_ring(struct ngbe_rx_queue *rxq)
+{
+ volatile struct ngbe_rx_desc *rxdp;
+ struct ngbe_rx_entry *rxep;
+ struct rte_mbuf *mb;
+ uint16_t pkt_len;
+ int nb_dd;
+ uint32_t s[LOOK_AHEAD];
+ uint32_t pkt_info[LOOK_AHEAD];
+ int i, j, nb_rx = 0;
+ uint32_t status;
+
+ /* get references to current descriptor and S/W ring entry */
+ rxdp = &rxq->rx_ring[rxq->rx_tail];
+ rxep = &rxq->sw_ring[rxq->rx_tail];
+
+ status = rxdp->qw1.lo.status;
+ /* check to make sure there is at least 1 packet to receive */
+ if (!(status & rte_cpu_to_le_32(NGBE_RXD_STAT_DD)))
+ return 0;
+
+ /*
+ * Scan LOOK_AHEAD descriptors at a time to determine which descriptors
+ * reference packets that are ready to be received.
+ */
+ for (i = 0; i < RTE_PMD_NGBE_RX_MAX_BURST;
+ i += LOOK_AHEAD, rxdp += LOOK_AHEAD, rxep += LOOK_AHEAD) {
+ /* Read desc statuses backwards to avoid race condition */
+ for (j = 0; j < LOOK_AHEAD; j++)
+ s[j] = rte_le_to_cpu_32(rxdp[j].qw1.lo.status);
+
+ rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
+
+ /* Compute how many status bits were set */
+ for (nb_dd = 0; nb_dd < LOOK_AHEAD &&
+ (s[nb_dd] & NGBE_RXD_STAT_DD); nb_dd++)
+ ;
+
+ for (j = 0; j < nb_dd; j++)
+ pkt_info[j] = rte_le_to_cpu_32(rxdp[j].qw0.dw0);
+
+ nb_rx += nb_dd;
+
+ /* Translate descriptor info to mbuf format */
+ for (j = 0; j < nb_dd; ++j) {
+ mb = rxep[j].mbuf;
+ pkt_len = rte_le_to_cpu_16(rxdp[j].qw1.hi.len);
+ mb->data_len = pkt_len;
+ mb->pkt_len = pkt_len;
+
+ mb->packet_type =
+ ngbe_rxd_pkt_info_to_pkt_type(pkt_info[j],
+ NGBE_PTID_MASK);
+ }
+
+ /* Move mbuf pointers from the S/W ring to the stage */
+ for (j = 0; j < LOOK_AHEAD; ++j)
+ rxq->rx_stage[i + j] = rxep[j].mbuf;
+
+ /* stop if all requested packets could not be received */
+ if (nb_dd != LOOK_AHEAD)
+ break;
+ }
+
+ /* clear software ring entries so we can cleanup correctly */
+ for (i = 0; i < nb_rx; ++i)
+ rxq->sw_ring[rxq->rx_tail + i].mbuf = NULL;
+
+ return nb_rx;
+}
+
+static inline int
+ngbe_rx_alloc_bufs(struct ngbe_rx_queue *rxq, bool reset_mbuf)
+{
+ volatile struct ngbe_rx_desc *rxdp;
+ struct ngbe_rx_entry *rxep;
+ struct rte_mbuf *mb;
+ uint16_t alloc_idx;
+ __le64 dma_addr;
+ int diag, i;
+
+ /* allocate buffers in bulk directly into the S/W ring */
+ alloc_idx = rxq->rx_free_trigger - (rxq->rx_free_thresh - 1);
+ rxep = &rxq->sw_ring[alloc_idx];
+ diag = rte_mempool_get_bulk(rxq->mb_pool, (void *)rxep,
+ rxq->rx_free_thresh);
+ if (unlikely(diag != 0))
+ return -ENOMEM;
+
+ rxdp = &rxq->rx_ring[alloc_idx];
+ for (i = 0; i < rxq->rx_free_thresh; ++i) {
+ /* populate the static rte mbuf fields */
+ mb = rxep[i].mbuf;
+ if (reset_mbuf)
+ mb->port = rxq->port_id;
+
+ rte_mbuf_refcnt_set(mb, 1);
+ mb->data_off = RTE_PKTMBUF_HEADROOM;
+
+ /* populate the descriptors */
+ dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(mb));
+ NGBE_RXD_HDRADDR(&rxdp[i], 0);
+ NGBE_RXD_PKTADDR(&rxdp[i], dma_addr);
+ }
+
+ /* update state of internal queue structure */
+ rxq->rx_free_trigger = rxq->rx_free_trigger + rxq->rx_free_thresh;
+ if (rxq->rx_free_trigger >= rxq->nb_rx_desc)
+ rxq->rx_free_trigger = rxq->rx_free_thresh - 1;
+
+ /* no errors */
+ return 0;
+}
+
+static inline uint16_t
+ngbe_rx_fill_from_stage(struct ngbe_rx_queue *rxq, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct rte_mbuf **stage = &rxq->rx_stage[rxq->rx_next_avail];
+ int i;
+
+ /* how many packets are ready to return? */
+ nb_pkts = (uint16_t)RTE_MIN(nb_pkts, rxq->rx_nb_avail);
+
+ /* copy mbuf pointers to the application's packet list */
+ for (i = 0; i < nb_pkts; ++i)
+ rx_pkts[i] = stage[i];
+
+ /* update internal queue state */
+ rxq->rx_nb_avail = (uint16_t)(rxq->rx_nb_avail - nb_pkts);
+ rxq->rx_next_avail = (uint16_t)(rxq->rx_next_avail + nb_pkts);
+
+ return nb_pkts;
+}
+
+static inline uint16_t
+ngbe_rx_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ struct ngbe_rx_queue *rxq = (struct ngbe_rx_queue *)rx_queue;
+ struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id];
+ uint16_t nb_rx = 0;
+
+ /* Any previously recv'd pkts will be returned from the Rx stage */
+ if (rxq->rx_nb_avail)
+ return ngbe_rx_fill_from_stage(rxq, rx_pkts, nb_pkts);
+
+ /* Scan the H/W ring for packets to receive */
+ nb_rx = (uint16_t)ngbe_rx_scan_hw_ring(rxq);
+
+ /* update internal queue state */
+ rxq->rx_next_avail = 0;
+ rxq->rx_nb_avail = nb_rx;
+ rxq->rx_tail = (uint16_t)(rxq->rx_tail + nb_rx);
+
+ /* if required, allocate new buffers to replenish descriptors */
+ if (rxq->rx_tail > rxq->rx_free_trigger) {
+ uint16_t cur_free_trigger = rxq->rx_free_trigger;
+
+ if (ngbe_rx_alloc_bufs(rxq, true) != 0) {
+ int i, j;
+
+ PMD_RX_LOG(DEBUG, "RX mbuf alloc failed port_id=%u "
+ "queue_id=%u", (uint16_t)rxq->port_id,
+ (uint16_t)rxq->queue_id);
+
+ dev->data->rx_mbuf_alloc_failed +=
+ rxq->rx_free_thresh;
+
+ /*
+ * Need to rewind any previous receives if we cannot
+ * allocate new buffers to replenish the old ones.
+ */
+ rxq->rx_nb_avail = 0;
+ rxq->rx_tail = (uint16_t)(rxq->rx_tail - nb_rx);
+ for (i = 0, j = rxq->rx_tail; i < nb_rx; ++i, ++j)
+ rxq->sw_ring[j].mbuf = rxq->rx_stage[i];
+
+ return 0;
+ }
+
+ /* update tail pointer */
+ rte_wmb();
+ ngbe_set32_relaxed(rxq->rdt_reg_addr, cur_free_trigger);
+ }
+
+ if (rxq->rx_tail >= rxq->nb_rx_desc)
+ rxq->rx_tail = 0;
+
+ /* received any packets this loop? */
+ if (rxq->rx_nb_avail)
+ return ngbe_rx_fill_from_stage(rxq, rx_pkts, nb_pkts);
+
+ return 0;
+}
+
+/* split requests into chunks of size RTE_PMD_NGBE_RX_MAX_BURST */
+uint16_t
+ngbe_recv_pkts_bulk_alloc(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ uint16_t nb_rx;
+
+ if (unlikely(nb_pkts == 0))
+ return 0;
+
+ if (likely(nb_pkts <= RTE_PMD_NGBE_RX_MAX_BURST))
+ return ngbe_rx_recv_pkts(rx_queue, rx_pkts, nb_pkts);
+
+ /* request is relatively large, chunk it up */
+ nb_rx = 0;
+ while (nb_pkts) {
+ uint16_t ret, n;
+
+ n = (uint16_t)RTE_MIN(nb_pkts, RTE_PMD_NGBE_RX_MAX_BURST);
+ ret = ngbe_rx_recv_pkts(rx_queue, &rx_pkts[nb_rx], n);
+ nb_rx = (uint16_t)(nb_rx + ret);
+ nb_pkts = (uint16_t)(nb_pkts - ret);
+ if (ret < n)
+ break;
+ }
+
+ return nb_rx;
+}
+
uint16_t
ngbe_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
uint16_t nb_pkts)
return nb_rx;
}
+static inline void
+ngbe_fill_cluster_head_buf(struct rte_mbuf *head, struct ngbe_rx_desc *desc,
+ struct ngbe_rx_queue *rxq, uint32_t staterr)
+{
+ uint32_t pkt_info;
+
+ RTE_SET_USED(staterr);
+ head->port = rxq->port_id;
+
+ pkt_info = rte_le_to_cpu_32(desc->qw0.dw0);
+ head->packet_type = ngbe_rxd_pkt_info_to_pkt_type(pkt_info,
+ NGBE_PTID_MASK);
+}
+
+/**
+ * ngbe_recv_pkts_sc - receive handler for scatter case.
+ *
+ * @rx_queue Rx queue handle
+ * @rx_pkts table of received packets
+ * @nb_pkts size of rx_pkts table
+ * @bulk_alloc if TRUE bulk allocation is used for a HW ring refilling
+ *
+ * Returns the number of received packets/clusters (according to the "bulk
+ * receive" interface).
+ */
+static inline uint16_t
+ngbe_recv_pkts_sc(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts,
+ bool bulk_alloc)
+{
+ struct ngbe_rx_queue *rxq = rx_queue;
+ struct rte_eth_dev *dev = &rte_eth_devices[rxq->port_id];
+ volatile struct ngbe_rx_desc *rx_ring = rxq->rx_ring;
+ struct ngbe_rx_entry *sw_ring = rxq->sw_ring;
+ struct ngbe_scattered_rx_entry *sw_sc_ring = rxq->sw_sc_ring;
+ uint16_t rx_id = rxq->rx_tail;
+ uint16_t nb_rx = 0;
+ uint16_t nb_hold = rxq->nb_rx_hold;
+ uint16_t prev_id = rxq->rx_tail;
+
+ while (nb_rx < nb_pkts) {
+ bool eop;
+ struct ngbe_rx_entry *rxe;
+ struct ngbe_scattered_rx_entry *sc_entry;
+ struct ngbe_scattered_rx_entry *next_sc_entry = NULL;
+ struct ngbe_rx_entry *next_rxe = NULL;
+ struct rte_mbuf *first_seg;
+ struct rte_mbuf *rxm;
+ struct rte_mbuf *nmb = NULL;
+ struct ngbe_rx_desc rxd;
+ uint16_t data_len;
+ uint16_t next_id;
+ volatile struct ngbe_rx_desc *rxdp;
+ uint32_t staterr;
+
+next_desc:
+ rxdp = &rx_ring[rx_id];
+ staterr = rte_le_to_cpu_32(rxdp->qw1.lo.status);
+
+ if (!(staterr & NGBE_RXD_STAT_DD))
+ break;
+
+ rxd = *rxdp;
+
+ PMD_RX_LOG(DEBUG, "port_id=%u queue_id=%u rx_id=%u "
+ "staterr=0x%x data_len=%u",
+ rxq->port_id, rxq->queue_id, rx_id, staterr,
+ rte_le_to_cpu_16(rxd.qw1.hi.len));
+
+ if (!bulk_alloc) {
+ nmb = rte_mbuf_raw_alloc(rxq->mb_pool);
+ if (nmb == NULL) {
+ PMD_RX_LOG(DEBUG, "Rx mbuf alloc failed "
+ "port_id=%u queue_id=%u",
+ rxq->port_id, rxq->queue_id);
+
+ dev->data->rx_mbuf_alloc_failed++;
+ break;
+ }
+ } else if (nb_hold > rxq->rx_free_thresh) {
+ uint16_t next_rdt = rxq->rx_free_trigger;
+
+ if (!ngbe_rx_alloc_bufs(rxq, false)) {
+ rte_wmb();
+ ngbe_set32_relaxed(rxq->rdt_reg_addr,
+ next_rdt);
+ nb_hold -= rxq->rx_free_thresh;
+ } else {
+ PMD_RX_LOG(DEBUG, "Rx bulk alloc failed "
+ "port_id=%u queue_id=%u",
+ rxq->port_id, rxq->queue_id);
+
+ dev->data->rx_mbuf_alloc_failed++;
+ break;
+ }
+ }
+
+ nb_hold++;
+ rxe = &sw_ring[rx_id];
+ eop = staterr & NGBE_RXD_STAT_EOP;
+
+ next_id = rx_id + 1;
+ if (next_id == rxq->nb_rx_desc)
+ next_id = 0;
+
+ /* Prefetch next mbuf while processing current one. */
+ rte_ngbe_prefetch(sw_ring[next_id].mbuf);
+
+ /*
+ * When next Rx descriptor is on a cache-line boundary,
+ * prefetch the next 4 RX descriptors and the next 4 pointers
+ * to mbufs.
+ */
+ if ((next_id & 0x3) == 0) {
+ rte_ngbe_prefetch(&rx_ring[next_id]);
+ rte_ngbe_prefetch(&sw_ring[next_id]);
+ }
+
+ rxm = rxe->mbuf;
+
+ if (!bulk_alloc) {
+ __le64 dma =
+ rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb));
+ /*
+ * Update Rx descriptor with the physical address of the
+ * new data buffer of the new allocated mbuf.
+ */
+ rxe->mbuf = nmb;
+
+ rxm->data_off = RTE_PKTMBUF_HEADROOM;
+ NGBE_RXD_HDRADDR(rxdp, 0);
+ NGBE_RXD_PKTADDR(rxdp, dma);
+ } else {
+ rxe->mbuf = NULL;
+ }
+
+ /*
+ * Set data length & data buffer address of mbuf.
+ */
+ data_len = rte_le_to_cpu_16(rxd.qw1.hi.len);
+ rxm->data_len = data_len;
+
+ if (!eop) {
+ uint16_t nextp_id;
+
+ nextp_id = next_id;
+ next_sc_entry = &sw_sc_ring[nextp_id];
+ next_rxe = &sw_ring[nextp_id];
+ rte_ngbe_prefetch(next_rxe);
+ }
+
+ sc_entry = &sw_sc_ring[rx_id];
+ first_seg = sc_entry->fbuf;
+ sc_entry->fbuf = NULL;
+
+ /*
+ * 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 += data_len;
+ first_seg->nb_segs++;
+ }
+
+ prev_id = rx_id;
+ rx_id = next_id;
+
+ /*
+ * If this is not the last buffer of the received packet, update
+ * the pointer to the first mbuf at the NEXTP entry in the
+ * sw_sc_ring and continue to parse the Rx ring.
+ */
+ if (!eop && next_rxe) {
+ rxm->next = next_rxe->mbuf;
+ next_sc_entry->fbuf = first_seg;
+ goto next_desc;
+ }
+
+ /* Initialize the first mbuf of the returned packet */
+ ngbe_fill_cluster_head_buf(first_seg, &rxd, rxq, 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;
+ }
+
+ /*
+ * Record index of the next Rx descriptor to probe.
+ */
+ rxq->rx_tail = rx_id;
+
+ /*
+ * 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 situation from the
+ * hardware point of view...
+ */
+ if (!bulk_alloc && 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",
+ rxq->port_id, rxq->queue_id, rx_id, nb_hold, nb_rx);
+
+ rte_wmb();
+ ngbe_set32_relaxed(rxq->rdt_reg_addr, prev_id);
+ nb_hold = 0;
+ }
+
+ rxq->nb_rx_hold = nb_hold;
+ return nb_rx;
+}
+
+uint16_t
+ngbe_recv_pkts_sc_single_alloc(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ return ngbe_recv_pkts_sc(rx_queue, rx_pkts, nb_pkts, false);
+}
+
+uint16_t
+ngbe_recv_pkts_sc_bulk_alloc(void *rx_queue, struct rte_mbuf **rx_pkts,
+ uint16_t nb_pkts)
+{
+ return ngbe_recv_pkts_sc(rx_queue, rx_pkts, nb_pkts, true);
+}
/*********************************************************************
*
rxq->pkt_last_seg = NULL;
}
+uint64_t
+ngbe_get_rx_port_offloads(struct rte_eth_dev *dev __rte_unused)
+{
+ return RTE_ETH_RX_OFFLOAD_SCATTER;
+}
+
int
ngbe_dev_rx_queue_setup(struct rte_eth_dev *dev,
uint16_t queue_idx,
return 0;
}
+void
+ngbe_set_rx_function(struct rte_eth_dev *dev)
+{
+ struct ngbe_adapter *adapter = ngbe_dev_adapter(dev);
+
+ if (dev->data->scattered_rx) {
+ /*
+ * Set the scattered callback: there are bulk and
+ * single allocation versions.
+ */
+ if (adapter->rx_bulk_alloc_allowed) {
+ PMD_INIT_LOG(DEBUG, "Using a Scattered with bulk "
+ "allocation callback (port=%d).",
+ dev->data->port_id);
+ dev->rx_pkt_burst = ngbe_recv_pkts_sc_bulk_alloc;
+ } else {
+ PMD_INIT_LOG(DEBUG, "Using Regular (non-vector, "
+ "single allocation) "
+ "Scattered Rx callback "
+ "(port=%d).",
+ dev->data->port_id);
+
+ dev->rx_pkt_burst = ngbe_recv_pkts_sc_single_alloc;
+ }
+ /*
+ * Below we set "simple" callbacks according to port/queues parameters.
+ * If parameters allow we are going to choose between the following
+ * callbacks:
+ * - Bulk Allocation
+ * - Single buffer allocation (the simplest one)
+ */
+ } else if (adapter->rx_bulk_alloc_allowed) {
+ PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are "
+ "satisfied. Rx Burst Bulk Alloc function "
+ "will be used on port=%d.",
+ dev->data->port_id);
+
+ dev->rx_pkt_burst = ngbe_recv_pkts_bulk_alloc;
+ } else {
+ PMD_INIT_LOG(DEBUG, "Rx Burst Bulk Alloc Preconditions are not "
+ "satisfied, or Scattered Rx is requested "
+ "(port=%d).",
+ dev->data->port_id);
+
+ dev->rx_pkt_burst = ngbe_recv_pkts;
+ }
+}
+
/*
* Initializes Receive Unit.
*/
uint32_t srrctl;
uint16_t buf_size;
uint16_t i;
+ struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
PMD_INIT_FUNC_TRACE();
hw = ngbe_dev_hw(dev);
wr32(hw, NGBE_RXCFG(rxq->reg_idx), srrctl);
}
+ if (rx_conf->offloads & RTE_ETH_RX_OFFLOAD_SCATTER)
+ dev->data->scattered_rx = 1;
+
+ ngbe_set_rx_function(dev);
+
return 0;
}
git.droids-corp.org / dpdk.git / commitdiff