diff --git a/drivers/event/cnxk/cn10k_eventdev.c b/drivers/event/cnxk/cn10k_eventdev.c
index 670fc9e926..8ee9ab3c5c 100644
--- a/drivers/event/cnxk/cn10k_eventdev.c
+++ b/drivers/event/cnxk/cn10k_eventdev.c
@@ -843,16 +843,9 @@ cn10k_sso_txq_fc_update(const struct rte_eth_dev *eth_dev, int32_t tx_queue_id)
 		sq = &cnxk_eth_dev->sqs[tx_queue_id];
 		txq = eth_dev->data->tx_queues[tx_queue_id];
 		sqes_per_sqb = 1U << txq->sqes_per_sqb_log2;
-		sq->nb_sqb_bufs_adj =
-			sq->nb_sqb_bufs -
-			RTE_ALIGN_MUL_CEIL(sq->nb_sqb_bufs, sqes_per_sqb) /
-				sqes_per_sqb;
 		if (cnxk_eth_dev->tx_offloads & RTE_ETH_TX_OFFLOAD_SECURITY)
-			sq->nb_sqb_bufs_adj -= (cnxk_eth_dev->outb.nb_desc /
-						(sqes_per_sqb - 1));
+			sq->nb_sqb_bufs_adj -= (cnxk_eth_dev->outb.nb_desc / sqes_per_sqb);
 		txq->nb_sqb_bufs_adj = sq->nb_sqb_bufs_adj;
-		txq->nb_sqb_bufs_adj =
-			((100 - ROC_NIX_SQB_THRESH) * txq->nb_sqb_bufs_adj) / 100;
 	}
 }

diff --git a/drivers/event/cnxk/cn10k_tx_worker.h b/drivers/event/cnxk/cn10k_tx_worker.h
index 31cbccf7d6..b6c9bb1d26 100644
--- a/drivers/event/cnxk/cn10k_tx_worker.h
+++ b/drivers/event/cnxk/cn10k_tx_worker.h
@@ -32,9 +32,9 @@ cn10k_sso_txq_fc_wait(const struct cn10k_eth_txq *txq)
 static __rte_always_inline int32_t
 cn10k_sso_sq_depth(const struct cn10k_eth_txq *txq)
 {
-	return (txq->nb_sqb_bufs_adj -
-		__atomic_load_n((int16_t *)txq->fc_mem, __ATOMIC_RELAXED))
-	       << txq->sqes_per_sqb_log2;
+	int32_t avail = (int32_t)txq->nb_sqb_bufs_adj -
+			(int32_t)__atomic_load_n(txq->fc_mem, __ATOMIC_RELAXED);
+	return (avail << txq->sqes_per_sqb_log2) - avail;
 }

 static __rte_always_inline uint16_t
diff --git a/drivers/event/cnxk/cn9k_eventdev.c b/drivers/event/cnxk/cn9k_eventdev.c
index 7ed9aa1331..dde58b60e4 100644
--- a/drivers/event/cnxk/cn9k_eventdev.c
+++ b/drivers/event/cnxk/cn9k_eventdev.c
@@ -877,16 +877,9 @@ cn9k_sso_txq_fc_update(const struct rte_eth_dev *eth_dev, int32_t tx_queue_id)
 		sq = &cnxk_eth_dev->sqs[tx_queue_id];
 		txq = eth_dev->data->tx_queues[tx_queue_id];
 		sqes_per_sqb = 1U << txq->sqes_per_sqb_log2;
-		sq->nb_sqb_bufs_adj =
-			sq->nb_sqb_bufs -
-			RTE_ALIGN_MUL_CEIL(sq->nb_sqb_bufs, sqes_per_sqb) /
-				sqes_per_sqb;
 		if (cnxk_eth_dev->tx_offloads & RTE_ETH_TX_OFFLOAD_SECURITY)
-			sq->nb_sqb_bufs_adj -= (cnxk_eth_dev->outb.nb_desc /
-						(sqes_per_sqb - 1));
+			sq->nb_sqb_bufs_adj -= (cnxk_eth_dev->outb.nb_desc / sqes_per_sqb);
 		txq->nb_sqb_bufs_adj = sq->nb_sqb_bufs_adj;
-		txq->nb_sqb_bufs_adj =
-			((100 - ROC_NIX_SQB_THRESH) * txq->nb_sqb_bufs_adj) / 100;
 	}
 }

diff --git a/drivers/event/cnxk/cn9k_worker.h b/drivers/event/cnxk/cn9k_worker.h
index ec2c1c68dd..ed3b97d7e1 100644
--- a/drivers/event/cnxk/cn9k_worker.h
+++ b/drivers/event/cnxk/cn9k_worker.h
@@ -713,6 +713,14 @@ cn9k_sso_hws_xmit_sec_one(const struct cn9k_eth_txq *txq, uint64_t base,
 }
 #endif

+static __rte_always_inline int32_t
+cn9k_sso_sq_depth(const struct cn9k_eth_txq *txq)
+{
+	int32_t avail = (int32_t)txq->nb_sqb_bufs_adj -
+			(int32_t)__atomic_load_n(txq->fc_mem, __ATOMIC_RELAXED);
+	return (avail << txq->sqes_per_sqb_log2) - avail;
+}
+
 static __rte_always_inline uint16_t
 cn9k_sso_hws_event_tx(uint64_t base, struct rte_event *ev, uint64_t *cmd,
 		      uint64_t *txq_data, const uint32_t flags)
@@ -736,9 +744,7 @@ cn9k_sso_hws_event_tx(uint64_t base, struct rte_event *ev, uint64_t *cmd,
 	if (flags & NIX_TX_OFFLOAD_MBUF_NOFF_F && txq->tx_compl.ena)
 		handle_tx_completion_pkts(txq, 1);

-	if (((txq->nb_sqb_bufs_adj -
-	      __atomic_load_n((int16_t *)txq->fc_mem, __ATOMIC_RELAXED))
-	     << txq->sqes_per_sqb_log2) <= 0)
+	if (cn9k_sso_sq_depth(txq) <= 0)
 		return 0;
 	cn9k_nix_tx_skeleton(txq, cmd, flags, 0);
 	cn9k_nix_xmit_prepare(txq, m, cmd, flags, txq->lso_tun_fmt, txq->mark_flag,
diff --git a/drivers/net/cnxk/cn10k_tx.h b/drivers/net/cnxk/cn10k_tx.h
index 4f23a8dfc3..a365cbe0ee 100644
--- a/drivers/net/cnxk/cn10k_tx.h
+++ b/drivers/net/cnxk/cn10k_tx.h
@@ -35,12 +35,13 @@

 #define NIX_XMIT_FC_OR_RETURN(txq, pkts)                                       \
 	do {                                                                   \
+		int64_t avail;                                                 \
 		/* Cached value is low, Update the fc_cache_pkts */            \
 		if (unlikely((txq)->fc_cache_pkts < (pkts))) {                 \
+			avail = txq->nb_sqb_bufs_adj - *txq->fc_mem;           \
 			/* Multiply with sqe_per_sqb to express in pkts */     \
 			(txq)->fc_cache_pkts =                                 \
-				((txq)->nb_sqb_bufs_adj - *(txq)->fc_mem)      \
-				<< (txq)->sqes_per_sqb_log2;                   \
+				(avail << (txq)->sqes_per_sqb_log2) - avail;   \
 			/* Check it again for the room */                      \
 			if (unlikely((txq)->fc_cache_pkts < (pkts)))           \
 				return 0;                                      \
@@ -113,10 +114,9 @@ cn10k_nix_vwqe_wait_fc(struct cn10k_eth_txq *txq, int64_t req)
 	if (cached < 0) {
 		/* Check if we have space else retry. */
 		do {
-			refill =
-				(txq->nb_sqb_bufs_adj -
-				 __atomic_load_n(txq->fc_mem, __ATOMIC_RELAXED))
-				<< txq->sqes_per_sqb_log2;
+			refill = txq->nb_sqb_bufs_adj -
+				 __atomic_load_n(txq->fc_mem, __ATOMIC_RELAXED);
+			refill = (refill << txq->sqes_per_sqb_log2) - refill;
 		} while (refill <= 0);
 		__atomic_compare_exchange(&txq->fc_cache_pkts, &cached, &refill,
 					  0, __ATOMIC_RELEASE,
diff --git a/drivers/net/cnxk/cn9k_tx.h b/drivers/net/cnxk/cn9k_tx.h
index 8f1e05a461..fba4bb4215 100644
--- a/drivers/net/cnxk/cn9k_tx.h
+++ b/drivers/net/cnxk/cn9k_tx.h
@@ -32,12 +32,13 @@

 #define NIX_XMIT_FC_OR_RETURN(txq, pkts)                                       \
 	do {                                                                   \
+		int64_t avail;                                                 \
 		/* Cached value is low, Update the fc_cache_pkts */            \
 		if (unlikely((txq)->fc_cache_pkts < (pkts))) {                 \
+			avail = txq->nb_sqb_bufs_adj - *txq->fc_mem;           \
 			/* Multiply with sqe_per_sqb to express in pkts */     \
 			(txq)->fc_cache_pkts =                                 \
-				((txq)->nb_sqb_bufs_adj - *(txq)->fc_mem)      \
-				<< (txq)->sqes_per_sqb_log2;                   \
+				(avail << (txq)->sqes_per_sqb_log2) - avail;   \
 			/* Check it again for the room */                      \
 			if (unlikely((txq)->fc_cache_pkts < (pkts)))           \
 				return 0;                                      \
