[PATCH net-next 8/9] net: dsa: microchip: split ksz_get_tag_protocol()
From: Bastien Curutchet <hidden>
Date: 2026-05-05 14:25:33
Also in:
lkml
Subsystem:
microchip ksz series ethernet switch driver, networking drivers, networking [dsa], the rest · Maintainers:
Woojung Huh, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
From: Vladimir Oltean <vladimir.oltean@nxp.com> All the switch families use a common function to implement .get_tag_protocol(). This function then returns the relevant protocol depending on the chip ID. Make the protocol to dsa_switch_ops association a little bit more obvious by having separate implementations. Change made by manually checking which chip id has which dsa_switch_ops assigned to it, then filtering the common ksz_get_tag_protocol() for just those chip IDs pertaining to it. As an important benefit, we no longer have that weird-looking DSA_TAG_PROTO_NONE fallback which was never actually returned. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Bastien Curutchet (Schneider Electric) <redacted> --- drivers/net/dsa/microchip/ksz8.c | 32 +++++++++++++++++++++++++++++--- drivers/net/dsa/microchip/ksz9477.c | 16 +++++++++++++++- drivers/net/dsa/microchip/ksz_common.c | 31 ------------------------------- drivers/net/dsa/microchip/ksz_common.h | 3 --- drivers/net/dsa/microchip/lan937x_main.c | 9 ++++++++- 5 files changed, 52 insertions(+), 39 deletions(-)
diff --git a/drivers/net/dsa/microchip/ksz8.c b/drivers/net/dsa/microchip/ksz8.c
index f7801269b11a4..fa2e1256323c2 100644
--- a/drivers/net/dsa/microchip/ksz8.c
+++ b/drivers/net/dsa/microchip/ksz8.c@@ -2100,6 +2100,32 @@ static void ksz8_switch_exit(struct ksz_device *dev) ksz8_reset_switch(dev); } +static enum dsa_tag_protocol ksz8463_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol mp) +{ + return DSA_TAG_PROTO_KSZ9893; +} + +static enum dsa_tag_protocol ksz87xx_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol mp) +{ + return DSA_TAG_PROTO_KSZ8795; +} + +static enum dsa_tag_protocol ksz88xx_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol mp) +{ + struct ksz_device *dev = ds->priv; + + if (ksz_is_8895_family(dev)) /* KSZ8864, KSZ8895 */ + return DSA_TAG_PROTO_KSZ8795; + + return DSA_TAG_PROTO_KSZ9893; +} + static void ksz88x3_phylink_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state)
@@ -2229,7 +2255,7 @@ const struct ksz_dev_ops ksz88xx_dev_ops = { }; const struct dsa_switch_ops ksz8463_switch_ops = { - .get_tag_protocol = ksz_get_tag_protocol, + .get_tag_protocol = ksz8463_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, .get_phy_flags = ksz_get_phy_flags, .setup = ksz_setup,
@@ -2290,7 +2316,7 @@ const struct dsa_switch_ops ksz8463_switch_ops = { }; const struct dsa_switch_ops ksz87xx_switch_ops = { - .get_tag_protocol = ksz_get_tag_protocol, + .get_tag_protocol = ksz87xx_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, .get_phy_flags = ksz_get_phy_flags, .setup = ksz_setup,
@@ -2351,7 +2377,7 @@ const struct dsa_switch_ops ksz87xx_switch_ops = { }; const struct dsa_switch_ops ksz88xx_switch_ops = { - .get_tag_protocol = ksz_get_tag_protocol, + .get_tag_protocol = ksz88xx_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, .get_phy_flags = ksz_get_phy_flags, .setup = ksz_setup,
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 9fb0169b5e29e..9bac95bb079ff 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c@@ -1610,6 +1610,20 @@ static void ksz9477_switch_exit(struct ksz_device *dev) ksz9477_reset_switch(dev); } +static enum dsa_tag_protocol ksz9477_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol mp) +{ + struct ksz_device *dev = ds->priv; + + if (dev->chip_id == KSZ8563_CHIP_ID || + dev->chip_id == KSZ9893_CHIP_ID || + dev->chip_id == KSZ9563_CHIP_ID) + return DSA_TAG_PROTO_KSZ9893; + + return DSA_TAG_PROTO_KSZ9477; +} + static void ksz9477_set_gbit(struct ksz_device *dev, int port, bool gbit) { const u8 *bitval = dev->info->xmii_ctrl1;
@@ -1775,7 +1789,7 @@ const struct ksz_dev_ops ksz9477_dev_ops = { }; const struct dsa_switch_ops ksz9477_switch_ops = { - .get_tag_protocol = ksz_get_tag_protocol, + .get_tag_protocol = ksz9477_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, .get_phy_flags = ksz_get_phy_flags, .setup = ksz_setup,
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 37e575bf4e14d..1be055d3f1994 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c@@ -3304,37 +3304,6 @@ int ksz_port_bridge_flags(struct dsa_switch *ds, int port, return 0; } -enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds, - int port, - enum dsa_tag_protocol mp) -{ - struct ksz_device *dev = ds->priv; - enum dsa_tag_protocol proto = DSA_TAG_PROTO_NONE; - - if (ksz_is_ksz87xx(dev) || ksz_is_8895_family(dev)) - proto = DSA_TAG_PROTO_KSZ8795; - - if (dev->chip_id == KSZ88X3_CHIP_ID || - dev->chip_id == KSZ8463_CHIP_ID || - dev->chip_id == KSZ8563_CHIP_ID || - dev->chip_id == KSZ9893_CHIP_ID || - dev->chip_id == KSZ9563_CHIP_ID) - proto = DSA_TAG_PROTO_KSZ9893; - - if (dev->chip_id == KSZ8567_CHIP_ID || - dev->chip_id == KSZ9477_CHIP_ID || - dev->chip_id == KSZ9896_CHIP_ID || - dev->chip_id == KSZ9897_CHIP_ID || - dev->chip_id == KSZ9567_CHIP_ID || - dev->chip_id == LAN9646_CHIP_ID) - proto = DSA_TAG_PROTO_KSZ9477; - - if (is_lan937x(dev)) - proto = DSA_TAG_PROTO_LAN937X; - - return proto; -} - int ksz_connect_tag_protocol(struct dsa_switch *ds, enum dsa_tag_protocol proto) {
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 37923a1c43d80..39486b5571bd6 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h@@ -473,9 +473,6 @@ void ksz_teardown(struct dsa_switch *ds); int ksz_port_setup(struct dsa_switch *ds, int port); void ksz_port_teardown(struct dsa_switch *ds, int port); -enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds, - int port, - enum dsa_tag_protocol mp); int ksz_connect_tag_protocol(struct dsa_switch *ds, enum dsa_tag_protocol proto); void ksz_init_mib_timer(struct ksz_device *dev);
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index ff931b1143a52..c39be6eb50121 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c@@ -667,6 +667,13 @@ static void lan937x_switch_exit(struct ksz_device *dev) lan937x_reset_switch(dev); } +static enum dsa_tag_protocol lan937x_get_tag_protocol(struct dsa_switch *ds, + int port, + enum dsa_tag_protocol mp) +{ + return DSA_TAG_PROTO_LAN937X; +} + const struct phylink_mac_ops lan937x_phylink_mac_ops = { .mac_config = ksz_phylink_mac_config, .mac_link_down = ksz_phylink_mac_link_down,
@@ -714,7 +721,7 @@ const struct ksz_dev_ops lan937x_dev_ops = { }; const struct dsa_switch_ops lan937x_switch_ops = { - .get_tag_protocol = ksz_get_tag_protocol, + .get_tag_protocol = lan937x_get_tag_protocol, .connect_tag_protocol = ksz_connect_tag_protocol, .get_phy_flags = ksz_get_phy_flags, .setup = ksz_setup,
--
2.53.0