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From: vanshika.shukla@nxp.com
To: dev@dpdk.org, Hemant Agrawal <hemant.agrawal@nxp.com>,
Sachin Saxena <sachin.saxena@nxp.com>
Cc: Gagandeep Singh <g.singh@nxp.com>
Subject: [v2 36/43] net/dpaa2: support software taildrop
Date: Wed, 18 Sep 2024 13:20:49 +0530
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From: Gagandeep Singh <g.singh@nxp.com>
Add software based taildrop support.
Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
---
drivers/bus/fslmc/portal/dpaa2_hw_pvt.h | 2 +-
drivers/net/dpaa2/dpaa2_rxtx.c | 24 +++++++++++++++++++++++-
2 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
index c5900bd06a..03b9088cc6 100644
--- a/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
+++ b/drivers/bus/fslmc/portal/dpaa2_hw_pvt.h
@@ -179,7 +179,7 @@ struct __rte_cache_aligned dpaa2_queue {
struct dpaa2_queue *tx_conf_queue;
int32_t eventfd; /*!< Event Fd of this queue */
uint16_t nb_desc;
- uint16_t resv;
+ uint16_t tm_sw_td; /*!< TM software taildrop */
uint64_t offloads;
uint64_t lpbk_cntx;
};
diff --git a/drivers/net/dpaa2/dpaa2_rxtx.c b/drivers/net/dpaa2/dpaa2_rxtx.c
index 4bb785aa49..065b219ffd 100644
--- a/drivers/net/dpaa2/dpaa2_rxtx.c
+++ b/drivers/net/dpaa2/dpaa2_rxtx.c
@@ -1297,8 +1297,11 @@ dpaa2_dev_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
while (qbman_result_SCN_state(dpaa2_q->cscn)) {
retry_count++;
/* Retry for some time before giving up */
- if (retry_count > CONG_RETRY_COUNT)
+ if (retry_count > CONG_RETRY_COUNT) {
+ if (dpaa2_q->tm_sw_td)
+ goto sw_td;
goto skip_tx;
+ }
}
frames_to_send = (nb_pkts > dpaa2_eqcr_size) ?
@@ -1490,6 +1493,25 @@ dpaa2_dev_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
rte_pktmbuf_free_seg(buf_to_free[loop].seg);
}
+ return num_tx;
+sw_td:
+ loop = 0;
+ while (loop < num_tx) {
+ if (unlikely(RTE_MBUF_HAS_EXTBUF(*bufs)))
+ rte_pktmbuf_free(*bufs);
+ bufs++;
+ loop++;
+ }
+
+ /* free the pending buffers */
+ while (nb_pkts) {
+ rte_pktmbuf_free(*bufs);
+ bufs++;
+ nb_pkts--;
+ num_tx++;
+ }
+ dpaa2_q->tx_pkts += num_tx;
+
return num_tx;
}
--
2.25.1