From c22d8240fcd73a1c3ec8dcb055bd583fb970c375 Mon Sep 17 00:00:00 2001 From: "Russell King (Oracle)" Date: Wed, 10 Apr 2024 20:42:43 +0100 Subject: [PATCH 2/2] net: dsa: allow DSA switch drivers to provide their own phylink mac ops 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) Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli Link: https://lore.kernel.org/r/E1rudqF-006K9H-Cc@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski --- include/net/dsa.h | 5 +++++ net/dsa/dsa.c | 11 +++++++++++ net/dsa/port.c | 26 ++++++++++++++++++++------ 3 files changed, 36 insertions(+), 6 deletions(-) --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -458,6 +458,11 @@ 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; + + /* * Slave mii_bus and devices for the individual ports. */ u32 phys_mii_mask; --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -1510,6 +1510,17 @@ static int dsa_switch_probe(struct dsa_s 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) --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -1677,6 +1677,7 @@ static const struct phylink_mac_ops dsa_ 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; @@ -1700,8 +1701,12 @@ int dsa_port_phylink_create(struct dsa_p } } - 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); @@ -1967,12 +1972,23 @@ static void dsa_shared_port_validate_of( 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); @@ -1988,9 +2004,7 @@ int dsa_shared_port_link_register_of(str "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); }