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Date: Sun, 15 Aug 2021 04:47:47 +0300
From: Vladimir Oltean <vladimir.oltean@....com>
To: netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
"David S. Miller" <davem@...emloft.net>
Cc: Russell King <linux@...linux.org.uk>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
Colin Foster <colin.foster@...advantage.com>,
Florian Fainelli <f.fainelli@...il.com>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Claudiu Manoil <claudiu.manoil@....com>,
UNGLinuxDriver@...rochip.com
Subject: [PATCH v2 net-next 1/2] net: dsa: felix: stop calling ocelot_port_{enable,disable}
ocelot_port_enable touches ANA_PORT_PORT_CFG, which has the following
fields:
- LOCKED_PORTMOVE_CPU, LEARNDROP, LEARNCPU, LEARNAUTO, RECV_ENA, all of
which are written with their hardware default values, also runtime
invariants. So it makes no sense to write these during every .ndo_open.
- PORTID_VAL: this field has an out-of-reset value of zero for all ports
and must be initialized by software. Additionally, the
ocelot_setup_logical_port_ids() code path sets up different logical
port IDs for the ports in a hardware LAG, and we absolutely don't want
.ndo_open to interfere there and reset those values.
So in fact the write from ocelot_port_enable can better be moved to
ocelot_init_port, and the .ndo_open hook deleted.
ocelot_port_disable touches DEV_MAC_ENA_CFG and QSYS_SWITCH_PORT_MODE_PORT_ENA,
in an attempt to undo what ocelot_adjust_link did. But since .ndo_stop
does not get called each time the link falls (i.e. this isn't a
substitute for .phylink_mac_link_down), felix already does better at
this by writing those registers already in felix_phylink_mac_link_down.
So keep ocelot_port_disable (for now, until ocelot is converted to
phylink too), and just delete the felix call to it, which is not
necessary.
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
v1->v2: delete in this patch, and not the next, the stray unused
variables "ocelot" and "port" from ocelot_port_open after
no longer calling ocelot_port_enable
drivers/net/dsa/ocelot/felix.c | 19 -------------------
drivers/net/ethernet/mscc/ocelot.c | 22 +++++++++-------------
drivers/net/ethernet/mscc/ocelot_net.c | 4 ----
include/soc/mscc/ocelot.h | 2 --
4 files changed, 9 insertions(+), 38 deletions(-)
diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 583a22d901b3..0050bb5b10aa 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -796,23 +796,6 @@ static int felix_vlan_del(struct dsa_switch *ds, int port,
return ocelot_vlan_del(ocelot, port, vlan->vid);
}
-static int felix_port_enable(struct dsa_switch *ds, int port,
- struct phy_device *phy)
-{
- struct ocelot *ocelot = ds->priv;
-
- ocelot_port_enable(ocelot, port, phy);
-
- return 0;
-}
-
-static void felix_port_disable(struct dsa_switch *ds, int port)
-{
- struct ocelot *ocelot = ds->priv;
-
- return ocelot_port_disable(ocelot, port);
-}
-
static void felix_phylink_validate(struct dsa_switch *ds, int port,
unsigned long *supported,
struct phylink_link_state *state)
@@ -1615,8 +1598,6 @@ const struct dsa_switch_ops felix_switch_ops = {
.phylink_mac_config = felix_phylink_mac_config,
.phylink_mac_link_down = felix_phylink_mac_link_down,
.phylink_mac_link_up = felix_phylink_mac_link_up,
- .port_enable = felix_port_enable,
- .port_disable = felix_port_disable,
.port_fdb_dump = felix_fdb_dump,
.port_fdb_add = felix_fdb_add,
.port_fdb_del = felix_fdb_del,
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index adfb9781799e..a948c807349d 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -514,19 +514,6 @@ void ocelot_adjust_link(struct ocelot *ocelot, int port,
}
EXPORT_SYMBOL(ocelot_adjust_link);
-void ocelot_port_enable(struct ocelot *ocelot, int port,
- struct phy_device *phy)
-{
- /* Enable receiving frames on the port, and activate auto-learning of
- * MAC addresses.
- */
- ocelot_write_gix(ocelot, ANA_PORT_PORT_CFG_LEARNAUTO |
- ANA_PORT_PORT_CFG_RECV_ENA |
- ANA_PORT_PORT_CFG_PORTID_VAL(port),
- ANA_PORT_PORT_CFG, port);
-}
-EXPORT_SYMBOL(ocelot_port_enable);
-
void ocelot_port_disable(struct ocelot *ocelot, int port)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
@@ -1956,6 +1943,15 @@ void ocelot_init_port(struct ocelot *ocelot, int port)
/* Disable source address learning for standalone mode */
ocelot_port_set_learning(ocelot, port, false);
+ /* Set the port's initial logical port ID value, enable receiving
+ * frames on it, and configure the MAC address learning type to
+ * automatic.
+ */
+ ocelot_write_gix(ocelot, ANA_PORT_PORT_CFG_LEARNAUTO |
+ ANA_PORT_PORT_CFG_RECV_ENA |
+ ANA_PORT_PORT_CFG_PORTID_VAL(port),
+ ANA_PORT_PORT_CFG, port);
+
/* Enable vcap lookups */
ocelot_vcap_enable(ocelot, port);
}
diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
index de900ea70fd4..6a196cd6a61a 100644
--- a/drivers/net/ethernet/mscc/ocelot_net.c
+++ b/drivers/net/ethernet/mscc/ocelot_net.c
@@ -449,8 +449,6 @@ static int ocelot_port_open(struct net_device *dev)
{
struct ocelot_port_private *priv = netdev_priv(dev);
struct ocelot_port *ocelot_port = &priv->port;
- struct ocelot *ocelot = ocelot_port->ocelot;
- int port = priv->chip_port;
int err;
if (priv->serdes) {
@@ -474,8 +472,6 @@ static int ocelot_port_open(struct net_device *dev)
phy_attached_info(priv->phy);
phy_start(priv->phy);
- ocelot_port_enable(ocelot, port, priv->phy);
-
return 0;
}
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 2f5ce4d4fdbf..2c2dcb954f23 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -798,8 +798,6 @@ void ocelot_init_port(struct ocelot *ocelot, int port);
void ocelot_deinit_port(struct ocelot *ocelot, int port);
/* DSA callbacks */
-void ocelot_port_enable(struct ocelot *ocelot, int port,
- struct phy_device *phy);
void ocelot_port_disable(struct ocelot *ocelot, int port);
void ocelot_get_strings(struct ocelot *ocelot, int port, u32 sset, u8 *data);
void ocelot_get_ethtool_stats(struct ocelot *ocelot, int port, u64 *data);
--
2.25.1
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