[PATCH] event/cnxk: add preliminary Tx queue depth check

[pbhagavatula at marvell.com]

From: Pavan Nikhilesh <pbhagavatula at marvell.com>

add preliminary Tx queue depth check and return on failure.
Once the check passes, tx_adapter_enqueue() function becomes
a blocking call till it succeeds.

Signed-off-by: Pavan Nikhilesh <pbhagavatula at marvell.com>
---
 drivers/event/cnxk/cn10k_worker.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/event/cnxk/cn10k_worker.h b/drivers/event/cnxk/cn10k_worker.h
index 0915f404e0..a71e076ff8 100644
--- a/drivers/event/cnxk/cn10k_worker.h
+++ b/drivers/event/cnxk/cn10k_worker.h
@@ -655,6 +655,11 @@ cn10k_sso_hws_event_tx(struct cn10k_sso_hws *ws, struct rte_event *ev,
 	}

 	m = ev->mbuf;
+	txq = cn10k_sso_hws_xtract_meta(m, txq_data);
+	if (((txq->nb_sqb_bufs_adj -
+	      __atomic_load_n((int16_t *)txq->fc_mem, __ATOMIC_RELAXED))
+	     << txq->sqes_per_sqb_log2) <= 0)
+		return 0;
 	cn10k_sso_tx_one(ws, m, cmd, lmt_id, lmt_addr, ev->sched_type, txq_data,
 			 flags);

--
2.25.1