[PATCH net-next 5/7] net: dsa: netc: enable ingress port filtering lookup by default

[wei.fang@oss.nxp.com]

From: Wei Fang <wei.fang@nxp.com>

The ingress port filtering lookup function involves performing a lookup
against the ingress port filter table (IPFT). If the frame matches an
entry, subsequent frame processing functions will perform corresponding
operations based on the parameters specified in that entry. If no entry
matches the frame, the frame is allowed in, and passed to the next frame
processing function. Therefore, the ingress port filtering lookup is
enabled by default to simplify code logic, eliminating the need to track
whether the current IPFT has already added an entry for the port.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
---
 drivers/net/dsa/netc/netc_main.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/netc/netc_main.c b/drivers/net/dsa/netc/netc_main.c
index d326a00104e1..9cb9e618661e 100644
--- a/drivers/net/dsa/netc/netc_main.c
+++ b/drivers/net/dsa/netc/netc_main.c
@@ -555,6 +555,12 @@ static void netc_port_fixed_config(struct netc_port *np)
 	netc_port_rmw(np, NETC_PCR, PCR_L2DOSE | PCR_L3DOSE,
 		      PCR_L2DOSE | PCR_L3DOSE);
 
+	/* Enable ingress port filter table lookup, if no match is found,
+	 * the frame is allowed and passed to the next frame processing
+	 * function.
+	 */
+	netc_port_wr(np, NETC_PIPFCR, PIPFCR_EN);
+
 	/* Set the quanta value of TX PAUSE frame */
 	netc_mac_port_wr(np, NETC_PM_PAUSE_QUANTA(0), NETC_PAUSE_QUANTA);
 
@@ -1708,8 +1714,6 @@ static int netc_port_add_host_flood_rule(struct netc_port *np,
 	int err;
 
 	if (!uc && !mc) {
-		/* Disable ingress port filter table lookup */
-		netc_port_wr(np, NETC_PIPFCR, 0);
 		np->uc = false;
 		np->mc = false;
 
@@ -1753,8 +1757,6 @@ static int netc_port_add_host_flood_rule(struct netc_port *np,
 	np->uc = uc;
 	np->mc = mc;
 	np->ipft_hf_eid = host_flood->entry_id;
-	/* Enable ingress port filter table lookup */
-	netc_port_wr(np, NETC_PIPFCR, PIPFCR_EN);
 
 free_host_flood:
 	kfree(host_flood);
@@ -1779,7 +1781,6 @@ static void netc_port_remove_host_flood(struct netc_port *np, u32 entry_id)
 		np->ipft_hf_eid = NTMP_NULL_ENTRY_ID;
 		np->uc = false;
 		np->mc = false;
-		netc_port_wr(np, NETC_PIPFCR, 0);
 	}
 }
 
-- 
2.34.1