[PATCH net-next v19 01/15] net: phylink: keep and use MAC supported_interfaces in phylink struct

[Christian Marangi <ansuelsmth@gmail.com>]

Add in phylink struct a copy of supported_interfaces from phylink_config
and make use of that instead of relying on phylink_config value.

This in preparation for support of PCS handling internally to phylink
where a PCS can be removed or added after the phylink is created and we
need both a reference of the supported_interfaces value from
phylink_config and an internal value that can be updated with the new
PCS info.

Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/phy/phylink.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index e7734e45376c..5d649903be9e 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -62,6 +62,11 @@ struct phylink {
 	/* The link configuration settings */
 	struct phylink_link_state link_config;
 
+	/* What interface are supported by the current link.
+	 * Can change on removal or addition of new PCS.
+	 */
+	DECLARE_PHY_INTERFACE_MASK(supported_interfaces);
+
 	/* The current settings */
 	phy_interface_t cur_interface;
 
@@ -632,7 +637,7 @@ static int phylink_validate_mask(struct phylink *pl, struct phy_device *phy,
 static int phylink_validate(struct phylink *pl, unsigned long *supported,
 			    struct phylink_link_state *state)
 {
-	const unsigned long *interfaces = pl->config->supported_interfaces;
+	const unsigned long *interfaces = pl->supported_interfaces;
 
 	if (state->interface == PHY_INTERFACE_MODE_NA)
 		return phylink_validate_mask(pl, NULL, supported, state,
@@ -2090,6 +2095,9 @@ struct phylink *phylink_create(struct phylink_config *config,
 	__set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
 	timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
 
+	phy_interface_copy(pl->supported_interfaces,
+			   pl->config->supported_interfaces);
+
 	linkmode_fill(pl->supported);
 	linkmode_copy(pl->link_config.advertising, pl->supported);
 	phylink_validate(pl, pl->supported, &pl->link_config);
@@ -2212,7 +2220,7 @@ static int phylink_validate_phy(struct phylink *pl, struct phy_device *phy,
 		 * those which the host supports.
 		 */
 		phy_interface_and(interfaces, phy->possible_interfaces,
-				  pl->config->supported_interfaces);
+				  pl->supported_interfaces);
 
 		if (phy_interface_empty(interfaces)) {
 			phylink_err(pl, "PHY has no common interfaces\n");
@@ -3026,12 +3034,12 @@ static phy_interface_t phylink_sfp_select_interface(struct phylink *pl,
 		return interface;
 	}
 
-	if (!test_bit(interface, pl->config->supported_interfaces)) {
+	if (!test_bit(interface, pl->supported_interfaces)) {
 		phylink_err(pl,
 			    "selection of interface failed, SFP selected %s (%u) but MAC supports %*pbl\n",
 			    phy_modes(interface), interface,
 			    (int)PHY_INTERFACE_MODE_MAX,
-			    pl->config->supported_interfaces);
+			    pl->supported_interfaces);
 		return PHY_INTERFACE_MODE_NA;
 	}
 
@@ -3910,14 +3918,14 @@ static int phylink_sfp_config_optical(struct phylink *pl)
 
 	phylink_dbg(pl, "optical SFP: interfaces=[mac=%*pbl, sfp=%*pbl]\n",
 		    (int)PHY_INTERFACE_MODE_MAX,
-		    pl->config->supported_interfaces,
+		    pl->supported_interfaces,
 		    (int)PHY_INTERFACE_MODE_MAX,
 		    pl->sfp_interfaces);
 
 	/* Find the union of the supported interfaces by the PCS/MAC and
 	 * the SFP module.
 	 */
-	phy_interface_and(pl->sfp_interfaces, pl->config->supported_interfaces,
+	phy_interface_and(pl->sfp_interfaces, pl->supported_interfaces,
 			  pl->sfp_interfaces);
 	if (phy_interface_empty(pl->sfp_interfaces)) {
 		phylink_err(pl, "unsupported SFP module: no common interface modes\n");
@@ -4155,7 +4163,7 @@ static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
 
 	/* Set the PHY's host supported interfaces */
 	phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces,
-			  pl->config->supported_interfaces);
+			  pl->supported_interfaces);
 
 	phy_set_upstream_port(phy, pl->sfp_cage_port);
 
-- 
2.55.0