netdev - [PATCH net-next 06/13] bnxt_en: Add bnxt_lookup_ntp_filter_from

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Message-Id: <20231221220218.197386-7-michael.chan@broadcom.com>
Date: Thu, 21 Dec 2023 14:02:11 -0800
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com
Subject: [PATCH net-next 06/13] bnxt_en: Add bnxt_lookup_ntp_filter_from_idx() function

Add the helper function to look up the ntuple filter from the
hash index and use it in bnxt_rx_flow_steer().  The helper function
will also be used by user defined ntuple filters in the next
patches.

Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 26 +++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 66ec7d4d1398..267ffcffa2b4 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -13895,6 +13895,21 @@ static bool bnxt_fltr_match(struct bnxt_ntuple_filter *f1,
 	return false;
 }
 
+static struct bnxt_ntuple_filter *
+bnxt_lookup_ntp_filter_from_idx(struct bnxt *bp,
+				struct bnxt_ntuple_filter *fltr, u32 idx)
+{
+	struct bnxt_ntuple_filter *f;
+	struct hlist_head *head;
+
+	head = &bp->ntp_fltr_hash_tbl[idx];
+	hlist_for_each_entry_rcu(f, head, base.hash) {
+		if (bnxt_fltr_match(f, fltr))
+			return f;
+	}
+	return NULL;
+}
+
 static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 			      u16 rxq_index, u32 flow_id)
 {
@@ -13959,12 +13974,11 @@ static int bnxt_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
 	idx = bnxt_get_ntp_filter_idx(bp, fkeys, skb);
 	head = &bp->ntp_fltr_hash_tbl[idx];
 	rcu_read_lock();
-	hlist_for_each_entry_rcu(fltr, head, base.hash) {
-		if (bnxt_fltr_match(fltr, new_fltr)) {
-			rc = fltr->base.sw_id;
-			rcu_read_unlock();
-			goto err_free;
-		}
+	fltr = bnxt_lookup_ntp_filter_from_idx(bp, new_fltr, idx);
+	if (fltr) {
+		rcu_read_unlock();
+		rc = fltr->base.sw_id;
+		goto err_free;
 	}
 	rcu_read_unlock();
 
-- 
2.30.1


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