[PATCH net-next v4 10/13] net: dsa: lantiq_gswip: Consistently use macros for the mac bridge table

Martin Schiller
2024-06-11T11:41:44Z

Only bits [5:0] in mac_bridge.key[3] are reserved for the FID.
Also, for dynamic (learned) entries, bits [7:4] in mac_bridge.val[0]
represents the port.

Introduce new macros GSWIP_TABLE_MAC_BRIDGE_KEY3_FID and
GSWIP_TABLE_MAC_BRIDGE_VAL0_PORT macro and use it throughout the driver.
Also rename and update GSWIP_TABLE_MAC_BRIDGE_VAL1_STATIC to use the
BIT() macro. This makes the driver code easier to understand.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
---
drivers/net/dsa/lantiq_gswip.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 525a62a21601..cd88b00cfdc1 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -236,7 +236,9 @@
#define GSWIP_TABLE_ACTIVE_VLAN 0x01
#define GSWIP_TABLE_VLAN_MAPPING 0x02
#define GSWIP_TABLE_MAC_BRIDGE 0x0b
-#define GSWIP_TABLE_MAC_BRIDGE_STATIC 0x01 /* Static not, aging entry */
+#define GSWIP_TABLE_MAC_BRIDGE_KEY3_FID GENMASK(5, 0) /* Filtering identifier */
+#define GSWIP_TABLE_MAC_BRIDGE_VAL0_PORT GENMASK(7, 4) /* Port on learned entries */
+#define GSWIP_TABLE_MAC_BRIDGE_VAL1_STATIC BIT(0) /* Static, non-aging entry */

#define XRX200_GPHY_FW_ALIGN (16 * 1024)

@@ -1304,10 +1306,11 @@ static void gswip_port_fast_age(struct dsa_switch *ds, int port)
if (!mac_bridge.valid)
continue;

- if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_STATIC)
+ if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_VAL1_STATIC)
continue;

- if (((mac_bridge.val[0] & GENMASK(7, 4)) >> 4) != port)
+ if (port != FIELD_GET(GSWIP_TABLE_MAC_BRIDGE_VAL0_PORT,
+ mac_bridge.val[0]))
continue;

mac_bridge.valid = false;
@@ -1382,9 +1385,9 @@ static int gswip_port_fdb(struct dsa_switch *ds, int port,
mac_bridge.key[0] = addr[5] | (addr[4] << 8);
mac_bridge.key[1] = addr[3] | (addr[2] << 8);
mac_bridge.key[2] = addr[1] | (addr[0] << 8);
- mac_bridge.key[3] = fid;
+ mac_bridge.key[3] = FIELD_PREP(GSWIP_TABLE_MAC_BRIDGE_KEY3_FID, fid);
mac_bridge.val[0] = add ? BIT(port) : 0; /* port map */
- mac_bridge.val[1] = GSWIP_TABLE_MAC_BRIDGE_STATIC;
+ mac_bridge.val[1] = GSWIP_TABLE_MAC_BRIDGE_VAL1_STATIC;
mac_bridge.valid = add;

err = gswip_pce_table_entry_write(priv, &mac_bridge);
@@ -1438,14 +1441,15 @@ static int gswip_port_fdb_dump(struct dsa_switch *ds, int port,
addr[2] = (mac_bridge.key[1] >> 8) & 0xff;
addr[1] = mac_bridge.key[2] & 0xff;
addr[0] = (mac_bridge.key[2] >> 8) & 0xff;
- if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_STATIC) {
+ if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_VAL1_STATIC) {
if (mac_bridge.val[0] & BIT(port)) {
err = cb(addr, 0, true, data);
if (err)
return err;
}
} else {
- if (((mac_bridge.val[0] & GENMASK(7, 4)) >> 4) == port) {
+ if (port == FIELD_GET(GSWIP_TABLE_MAC_BRIDGE_VAL0_PORT,
+ mac_bridge.val[0])) {
err = cb(addr, 0, false, data);
if (err)
return err;
--
2.39.2