[dpdk-dev] [PATCH v2 10/16] fm10k: add func to release mbuf in case Vector RX applied

[Chen Jing D(Mark)]

From: "Chen Jing D(Mark)" <jing.d.c...@intel.com>

Since Vector RX use different variables to trace RX HW ring, it
leads to need different func to release mbuf properly.

Signed-off-by: Chen Jing D(Mark) <jing.d.chen at intel.com>
---
 drivers/net/fm10k/fm10k.h          |    1 +
 drivers/net/fm10k/fm10k_ethdev.c   |    6 ++++++
 drivers/net/fm10k/fm10k_rxtx_vec.c |   18 ++++++++++++++++++
 3 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/net/fm10k/fm10k.h b/drivers/net/fm10k/fm10k.h
index 8614e81..c5e66e2 100644
--- a/drivers/net/fm10k/fm10k.h
+++ b/drivers/net/fm10k/fm10k.h
@@ -329,6 +329,7 @@ uint16_t fm10k_xmit_pkts(void *tx_queue, struct rte_mbuf 
**tx_pkts,

 int fm10k_rxq_vec_setup(struct fm10k_rx_queue *rxq);
 int fm10k_rx_vec_condition_check(struct rte_eth_dev *);
+void fm10k_rx_queue_release_mbufs_vec(struct fm10k_rx_queue *rxq);
 uint16_t fm10k_recv_pkts_vec(void *, struct rte_mbuf **, uint16_t);
 uint16_t fm10k_recv_scattered_pkts_vec(void *, struct rte_mbuf **,
                                        uint16_t);
diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index 53c4ef1..2c3d8be 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -143,6 +143,12 @@ rx_queue_clean(struct fm10k_rx_queue *q)
        for (i = 0; i < q->nb_desc; ++i)
                q->hw_ring[i] = zero;

+       /* vPMD driver has a different way of releasing mbufs. */
+       if (q->rx_using_sse) {
+               fm10k_rx_queue_release_mbufs_vec(q);
+               return;
+       }
+
        /* free software buffers */
        for (i = 0; i < q->nb_desc; ++i) {
                if (q->sw_ring[i]) {
diff --git a/drivers/net/fm10k/fm10k_rxtx_vec.c 
b/drivers/net/fm10k/fm10k_rxtx_vec.c
index 237de9d..ab0218e 100644
--- a/drivers/net/fm10k/fm10k_rxtx_vec.c
+++ b/drivers/net/fm10k/fm10k_rxtx_vec.c
@@ -313,6 +313,24 @@ fm10k_rxq_rearm(struct fm10k_rx_queue *rxq)
        FM10K_PCI_REG_WRITE(rxq->tail_ptr, rx_id);
 }

+void __attribute__((cold))
+fm10k_rx_queue_release_mbufs_vec(struct fm10k_rx_queue *rxq)
+{
+       const unsigned mask = rxq->nb_desc - 1;
+       unsigned i;
+
+       if (rxq->sw_ring == NULL || rxq->rxrearm_nb >= rxq->nb_desc)
+               return;
+
+       /* free all mbufs that are valid in the ring */
+       for (i = rxq->next_dd; i != rxq->rxrearm_start; i = (i + 1) & mask)
+               rte_pktmbuf_free_seg(rxq->sw_ring[i]);
+       rxq->rxrearm_nb = rxq->nb_desc;
+
+       /* set all entries to NULL */
+       memset(rxq->sw_ring, 0, sizeof(rxq->sw_ring[0]) * rxq->nb_desc);
+}
+
 static inline uint16_t
 fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
                uint16_t nb_pkts, uint8_t *split_packet)
-- 
1.7.7.6