Commit e9f03a6a authored by Russell King (Oracle)'s avatar Russell King (Oracle) Committed by Jakub Kicinski
Browse files

net: phylink: add support for notifying PCS about EEE 



There are hooks in the stmmac driver into XPCS to control the EEE
settings when LPI is configured at the MAC. This bypasses the layering.
To allow this to be removed from the stmmac driver, add two new
methods for PCS to inform them when the LPI/EEE enablement state
changes at the MAC.

Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1thRQ3-003w6u-RH@rmk-PC.armlinux.org.uk


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 6aa3960d

drivers/net/phy/phylink.c

+22 −3
Original line number Diff line number Diff line
@@ -1073,6 +1073,18 @@ static void phylink_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode, 
		pcs->ops->pcs_link_up(pcs, neg_mode, interface, speed, duplex);

}



static void phylink_pcs_disable_eee(struct phylink_pcs *pcs)

{

	if (pcs && pcs->ops->pcs_disable_eee)

		pcs->ops->pcs_disable_eee(pcs);

}



static void phylink_pcs_enable_eee(struct phylink_pcs *pcs)

{

	if (pcs && pcs->ops->pcs_enable_eee)

		pcs->ops->pcs_enable_eee(pcs);

}



/* Query inband for a specific interface mode, asking the MAC for the

 * PCS which will be used to handle the interface mode.

 */
@@ -1601,6 +1613,8 @@ static void phylink_deactivate_lpi(struct phylink *pl) 
		phylink_dbg(pl, "disabling LPI\n");



		pl->mac_ops->mac_disable_tx_lpi(pl->config);



		phylink_pcs_disable_eee(pl->pcs);

	}

}
@@ -1617,13 +1631,18 @@ static void phylink_activate_lpi(struct phylink *pl) 
	phylink_dbg(pl, "LPI timer %uus, tx clock stop %u\n",

		    pl->mac_tx_lpi_timer, pl->mac_tx_clk_stop);



	phylink_pcs_enable_eee(pl->pcs);



	err = pl->mac_ops->mac_enable_tx_lpi(pl->config, pl->mac_tx_lpi_timer,

					     pl->mac_tx_clk_stop);

	if (!err)

		pl->mac_enable_tx_lpi = true;

	else

	if (err) {

		phylink_pcs_disable_eee(pl->pcs);

		phylink_err(pl, "%ps() failed: %pe\n",

			    pl->mac_ops->mac_enable_tx_lpi, ERR_PTR(err));

		return;

	}



	pl->mac_enable_tx_lpi = true;

}



static void phylink_link_up(struct phylink *pl,

include/linux/phylink.h

+22 −0
Original line number Diff line number Diff line
@@ -477,6 +477,10 @@ struct phylink_pcs { 
 * @pcs_an_restart: restart 802.3z BaseX autonegotiation.

 * @pcs_link_up: program the PCS for the resolved link configuration

 *               (where necessary).

 * @pcs_disable_eee: optional notification to PCS that EEE has been disabled

 *		     at the MAC.

 * @pcs_enable_eee: optional notification to PCS that EEE will be enabled at

 *		    the MAC.

 * @pcs_pre_init: configure PCS components necessary for MAC hardware

 *                initialization e.g. RX clock for stmmac.

 */
@@ -500,6 +504,8 @@ struct phylink_pcs_ops { 
	void (*pcs_an_restart)(struct phylink_pcs *pcs);

	void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int neg_mode,

			    phy_interface_t interface, int speed, int duplex);

	void (*pcs_disable_eee)(struct phylink_pcs *pcs);

	void (*pcs_enable_eee)(struct phylink_pcs *pcs);

	int (*pcs_pre_init)(struct phylink_pcs *pcs);

};
@@ -625,6 +631,22 @@ void pcs_an_restart(struct phylink_pcs *pcs); 
void pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode,

		 phy_interface_t interface, int speed, int duplex);



/**

 * pcs_disable_eee() - Disable EEE at the PCS

 * @pcs: a pointer to a &struct phylink_pcs

 *

 * Optional method informing the PCS that EEE has been disabled at the MAC.

 */

void pcs_disable_eee(struct phylink_pcs *pcs);



/**

 * pcs_enable_eee() - Enable EEE at the PCS

 * @pcs: a pointer to a &struct phylink_pcs

 *

 * Optional method informing the PCS that EEE is about to be enabled at the MAC.

 */

void pcs_enable_eee(struct phylink_pcs *pcs);



/**

 * pcs_pre_init() - Configure PCS components necessary for MAC initialization

 * @pcs: a pointer to a &struct phylink_pcs.