[06/10] net/gve: support basic Rx data path for DQO
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Commit Message
Add basic Rx data path support for DQO.
Signed-off-by: Junfeng Guo <junfeng.guo@intel.com>
Signed-off-by: Rushil Gupta <rushilg@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Signed-off-by: Jeroen de Borst <jeroendb@google.com>
---
drivers/net/gve/gve_ethdev.c | 1 +
drivers/net/gve/gve_ethdev.h | 3 +
drivers/net/gve/gve_rx_dqo.c | 128 +++++++++++++++++++++++++++++++++++
3 files changed, 132 insertions(+)
@@ -878,6 +878,7 @@ gve_dev_init(struct rte_eth_dev *eth_dev)
eth_dev->tx_pkt_burst = gve_tx_burst;
} else {
eth_dev->dev_ops = &gve_eth_dev_ops_dqo;
+ eth_dev->rx_pkt_burst = gve_rx_burst_dqo;
eth_dev->tx_pkt_burst = gve_tx_burst_dqo;
}
@@ -391,6 +391,9 @@ gve_stop_tx_queues_dqo(struct rte_eth_dev *dev);
void
gve_stop_rx_queues_dqo(struct rte_eth_dev *dev);
+uint16_t
+gve_rx_burst_dqo(void *rxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts);
+
uint16_t
gve_tx_burst_dqo(void *txq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
@@ -7,6 +7,134 @@
#include "gve_ethdev.h"
#include "base/gve_adminq.h"
+static inline void
+gve_rx_refill_dqo(struct gve_rx_queue *rxq)
+{
+ volatile struct gve_rx_desc_dqo *rx_buf_ring;
+ volatile struct gve_rx_desc_dqo *rx_buf_desc;
+ struct rte_mbuf *nmb[rxq->free_thresh];
+ uint16_t nb_refill = rxq->free_thresh;
+ uint16_t nb_desc = rxq->nb_rx_desc;
+ uint16_t next_avail = rxq->bufq_tail;
+ struct rte_eth_dev *dev;
+ uint64_t dma_addr;
+ uint16_t delta;
+ int i;
+
+ if (rxq->nb_rx_hold < rxq->free_thresh)
+ return;
+
+ rx_buf_ring = rxq->rx_ring;
+ delta = nb_desc - next_avail;
+ if (unlikely(delta < nb_refill)) {
+ if (likely(rte_pktmbuf_alloc_bulk(rxq->mpool, nmb, delta) == 0)) {
+ for (i = 0; i < delta; i++) {
+ rx_buf_desc = &rx_buf_ring[next_avail + i];
+ rxq->sw_ring[next_avail + i] = nmb[i];
+ dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb[i]));
+ rx_buf_desc->header_buf_addr = 0;
+ rx_buf_desc->buf_addr = dma_addr;
+ }
+ nb_refill -= delta;
+ next_avail = 0;
+ rxq->nb_rx_hold -= delta;
+ } else {
+ dev = &rte_eth_devices[rxq->port_id];
+ dev->data->rx_mbuf_alloc_failed += nb_desc - next_avail;
+ PMD_DRV_LOG(DEBUG, "RX mbuf alloc failed port_id=%u queue_id=%u",
+ rxq->port_id, rxq->queue_id);
+ return;
+ }
+ }
+
+ if (nb_desc - next_avail >= nb_refill) {
+ if (likely(rte_pktmbuf_alloc_bulk(rxq->mpool, nmb, nb_refill) == 0)) {
+ for (i = 0; i < nb_refill; i++) {
+ rx_buf_desc = &rx_buf_ring[next_avail + i];
+ rxq->sw_ring[next_avail + i] = nmb[i];
+ dma_addr = rte_cpu_to_le_64(rte_mbuf_data_iova_default(nmb[i]));
+ rx_buf_desc->header_buf_addr = 0;
+ rx_buf_desc->buf_addr = dma_addr;
+ }
+ next_avail += nb_refill;
+ rxq->nb_rx_hold -= nb_refill;
+ } else {
+ dev = &rte_eth_devices[rxq->port_id];
+ dev->data->rx_mbuf_alloc_failed += nb_desc - next_avail;
+ PMD_DRV_LOG(DEBUG, "RX mbuf alloc failed port_id=%u queue_id=%u",
+ rxq->port_id, rxq->queue_id);
+ }
+ }
+
+ rte_write32(next_avail, rxq->qrx_tail);
+
+ rxq->bufq_tail = next_avail;
+}
+
+uint16_t
+gve_rx_burst_dqo(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
+{
+ volatile struct gve_rx_compl_desc_dqo *rx_compl_ring;
+ volatile struct gve_rx_compl_desc_dqo *rx_desc;
+ struct gve_rx_queue *rxq;
+ struct rte_mbuf *rxm;
+ uint16_t rx_id_bufq;
+ uint16_t pkt_len;
+ uint16_t rx_id;
+ uint16_t nb_rx;
+
+ nb_rx = 0;
+ rxq = rx_queue;
+ rx_id = rxq->rx_tail;
+ rx_id_bufq = rxq->next_avail;
+ rx_compl_ring = rxq->compl_ring;
+
+ while (nb_rx < nb_pkts) {
+ rx_desc = &rx_compl_ring[rx_id];
+
+ /* check status */
+ if (rx_desc->generation != rxq->cur_gen_bit)
+ break;
+
+ if (unlikely(rx_desc->rx_error))
+ continue;
+
+ pkt_len = rx_desc->packet_len;
+
+ rx_id++;
+ if (rx_id == rxq->nb_rx_desc) {
+ rx_id = 0;
+ rxq->cur_gen_bit ^= 1;
+ }
+
+ rxm = rxq->sw_ring[rx_id_bufq];
+ rx_id_bufq++;
+ if (rx_id_bufq == rxq->nb_rx_desc)
+ rx_id_bufq = 0;
+ rxq->nb_rx_hold++;
+
+ rxm->pkt_len = pkt_len;
+ rxm->data_len = pkt_len;
+ rxm->port = rxq->port_id;
+ rxm->ol_flags = 0;
+
+ rxm->ol_flags |= RTE_MBUF_F_RX_RSS_HASH;
+ rxm->hash.rss = rte_be_to_cpu_32(rx_desc->hash);
+
+ rx_pkts[nb_rx++] = rxm;
+ }
+
+ if (nb_rx > 0) {
+ rxq->rx_tail = rx_id;
+ if (rx_id_bufq != rxq->next_avail)
+ rxq->next_avail = rx_id_bufq;
+
+ gve_rx_refill_dqo(rxq);
+ }
+
+ return nb_rx;
+}
+
static inline void
gve_release_rxq_mbufs_dqo(struct gve_rx_queue *rxq)
{