6.9-stable review patch. If anyone has any objections, please let me know.
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From: Russell King (Oracle) rmk+kernel@armlinux.org.uk
[ Upstream commit cae425cb43feddd9fd62fc1b25567f9463da4915 ]
Rather than having a shim for each and every phylink MAC operation, allow DSA switch drivers to provide their own ops structure. When a DSA driver provides the phylink MAC operations, the shimmed ops must not be provided, so fail an attempt to register a switch with both the phylink_mac_ops in struct dsa_switch and the phylink_mac_* operations populated in dsa_switch_ops populated.
Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Reviewed-by: Vladimir Oltean olteanv@gmail.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Link: https://lore.kernel.org/r/E1rudqF-006K9H-Cc@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski kuba@kernel.org Stable-dep-of: 0005b2dc43f9 ("dsa: lan9303: Fix mapping between DSA port number and PHY address") Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/dsa.h | 5 +++++ net/dsa/dsa.c | 11 +++++++++++ net/dsa/port.c | 26 ++++++++++++++++++++------ 3 files changed, 36 insertions(+), 6 deletions(-)
diff --git a/include/net/dsa.h b/include/net/dsa.h index f228b479a5fd2..7edfd8de8882f 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -457,6 +457,11 @@ struct dsa_switch { */ const struct dsa_switch_ops *ops;
+ /* + * Allow a DSA switch driver to override the phylink MAC ops + */ + const struct phylink_mac_ops *phylink_mac_ops; + /* * User mii_bus and devices for the individual ports. */ diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 09d2f5d4b3dd4..2f347cd373162 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -1505,6 +1505,17 @@ static int dsa_switch_probe(struct dsa_switch *ds) if (!ds->num_ports) return -EINVAL;
+ if (ds->phylink_mac_ops) { + if (ds->ops->phylink_mac_select_pcs || + ds->ops->phylink_mac_prepare || + ds->ops->phylink_mac_config || + ds->ops->phylink_mac_finish || + ds->ops->phylink_mac_link_down || + ds->ops->phylink_mac_link_up || + ds->ops->adjust_link) + return -EINVAL; + } + if (np) { err = dsa_switch_parse_of(ds, np); if (err) diff --git a/net/dsa/port.c b/net/dsa/port.c index 02bf1c306bdca..c6febc3d96d9b 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -1662,6 +1662,7 @@ static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
int dsa_port_phylink_create(struct dsa_port *dp) { + const struct phylink_mac_ops *mac_ops; struct dsa_switch *ds = dp->ds; phy_interface_t mode; struct phylink *pl; @@ -1685,8 +1686,12 @@ int dsa_port_phylink_create(struct dsa_port *dp) } }
- pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), - mode, &dsa_port_phylink_mac_ops); + mac_ops = &dsa_port_phylink_mac_ops; + if (ds->phylink_mac_ops) + mac_ops = ds->phylink_mac_ops; + + pl = phylink_create(&dp->pl_config, of_fwnode_handle(dp->dn), mode, + mac_ops); if (IS_ERR(pl)) { pr_err("error creating PHYLINK: %ld\n", PTR_ERR(pl)); return PTR_ERR(pl); @@ -1952,12 +1957,23 @@ static void dsa_shared_port_validate_of(struct dsa_port *dp, dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index); }
+static void dsa_shared_port_link_down(struct dsa_port *dp) +{ + struct dsa_switch *ds = dp->ds; + + if (ds->phylink_mac_ops && ds->phylink_mac_ops->mac_link_down) + ds->phylink_mac_ops->mac_link_down(&dp->pl_config, MLO_AN_FIXED, + PHY_INTERFACE_MODE_NA); + else if (ds->ops->phylink_mac_link_down) + ds->ops->phylink_mac_link_down(ds, dp->index, MLO_AN_FIXED, + PHY_INTERFACE_MODE_NA); +} + int dsa_shared_port_link_register_of(struct dsa_port *dp) { struct dsa_switch *ds = dp->ds; bool missing_link_description; bool missing_phy_mode; - int port = dp->index;
dsa_shared_port_validate_of(dp, &missing_phy_mode, &missing_link_description); @@ -1973,9 +1989,7 @@ int dsa_shared_port_link_register_of(struct dsa_port *dp) "Skipping phylink registration for %s port %d\n", dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index); } else { - if (ds->ops->phylink_mac_link_down) - ds->ops->phylink_mac_link_down(ds, port, - MLO_AN_FIXED, PHY_INTERFACE_MODE_NA); + dsa_shared_port_link_down(dp);
return dsa_shared_port_phylink_register(dp); }