Commit 24699cc1 authored by Russell King (Oracle)'s avatar Russell King (Oracle) Committed by David S. Miller
Browse files

net: phylink: add support for PCS link change notifications 



Add a function, phylink_pcs_change() which can be used by PCs drivers
to notify phylink about changes to the PCS link state.

Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aee60988

drivers/net/phy/phylink.c

+34 −4
Original line number Diff line number Diff line
@@ -1137,6 +1137,11 @@ static void phylink_major_config(struct phylink *pl, bool restart, 
	if (pcs_changed) {

		phylink_pcs_disable(pl->pcs);



		if (pl->pcs)

			pl->pcs->phylink = NULL;



		pcs->phylink = pl;



		pl->pcs = pcs;

	}
@@ -1991,6 +1996,14 @@ void phylink_disconnect_phy(struct phylink *pl) 
}

EXPORT_SYMBOL_GPL(phylink_disconnect_phy);



static void phylink_link_changed(struct phylink *pl, bool up, const char *what)

{

	if (!up)

		pl->mac_link_dropped = true;

	phylink_run_resolve(pl);

	phylink_dbg(pl, "%s link %s\n", what, up ? "up" : "down");

}



/**

 * phylink_mac_change() - notify phylink of a change in MAC state

 * @pl: a pointer to a &struct phylink returned from phylink_create()
@@ -2001,13 +2014,30 @@ EXPORT_SYMBOL_GPL(phylink_disconnect_phy); 
 */

void phylink_mac_change(struct phylink *pl, bool up)

{

	if (!up)

		pl->mac_link_dropped = true;

	phylink_run_resolve(pl);

	phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");

	phylink_link_changed(pl, up, "mac");

}

EXPORT_SYMBOL_GPL(phylink_mac_change);



/**

 * phylink_pcs_change() - notify phylink of a change to PCS link state

 * @pcs: pointer to &struct phylink_pcs

 * @up: indicates whether the link is currently up.

 *

 * The PCS driver should call this when the state of its link changes

 * (e.g. link failure, new negotiation results, etc.) Note: it should

 * not determine "up" by reading the BMSR. If in doubt about the link

 * state at interrupt time, then pass true if pcs_get_state() returns

 * the latched link-down state, otherwise pass false.

 */

void phylink_pcs_change(struct phylink_pcs *pcs, bool up)

{

	struct phylink *pl = pcs->phylink;



	if (pl)

		phylink_link_changed(pl, up, "pcs");

}

EXPORT_SYMBOL_GPL(phylink_pcs_change);



static irqreturn_t phylink_link_handler(int irq, void *data)

{

	struct phylink *pl = data;

include/linux/phylink.h

+7 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ struct device_node; 
struct ethtool_cmd;

struct fwnode_handle;

struct net_device;

struct phylink;



enum {

	MLO_PAUSE_NONE,
@@ -520,14 +521,19 @@ struct phylink_pcs_ops; 
/**

 * struct phylink_pcs - PHYLINK PCS instance

 * @ops: a pointer to the &struct phylink_pcs_ops structure

 * @phylink: pointer to &struct phylink_config

 * @neg_mode: provide PCS neg mode via "mode" argument

 * @poll: poll the PCS for link changes

 *

 * This structure is designed to be embedded within the PCS private data,

 * and will be passed between phylink and the PCS.

 *

 * The @phylink member is private to phylink and must not be touched by

 * the PCS driver.

 */

struct phylink_pcs {

	const struct phylink_pcs_ops *ops;

	struct phylink *phylink;

	bool neg_mode;

	bool poll;

};
@@ -699,6 +705,7 @@ int phylink_fwnode_phy_connect(struct phylink *pl, 
void phylink_disconnect_phy(struct phylink *);



void phylink_mac_change(struct phylink *, bool up);

void phylink_pcs_change(struct phylink_pcs *, bool up);



void phylink_start(struct phylink *);

void phylink_stop(struct phylink *);