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Message-Id: <E1jxq4k-0004TQ-Nr@rmk-PC.armlinux.org.uk>
Date: Tue, 21 Jul 2020 12:04:46 +0100
From: Russell King <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Ioana Ciornei <ioana.ciornei@....com>
Cc: "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
Alexandru Marginean <alexandru.marginean@....com>,
Claudiu Manoil <claudiu.manoil@....com>,
"michael@...le.cc" <michael@...le.cc>,
"olteanv@...il.com" <olteanv@...il.com>,
Vladimir Oltean <vladimir.oltean@....com>,
Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 13/14] net: phylink: add struct phylink_pcs
Add a way for MAC PCS to have private data while keeping independence
from struct phylink_config, which is used for the MAC itself. We need
this independence as we will have stand-alone code for PCS that is
independent of the MAC. Introduce struct phylink_pcs, which is
designed to be embedded in a driver private data structure.
This structure does not include a mdio_device as there are PCS
implementations such as the Marvell DSA and network drivers where this
is not necessary.
Reviewed-by: Ioana Ciornei <ioana.ciornei@....com>
Signed-off-by: Russell King <rmk+kernel@...linux.org.uk>
---
drivers/net/phy/phylink.c | 34 ++++++++++++++++++++++-------
include/linux/phylink.h | 45 ++++++++++++++++++++++++++-------------
2 files changed, 56 insertions(+), 23 deletions(-)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index d554a0fbb4f3..b57cd2142786 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -43,6 +43,7 @@ struct phylink {
const struct phylink_mac_ops *mac_ops;
const struct phylink_pcs_ops *pcs_ops;
struct phylink_config *config;
+ struct phylink_pcs *pcs;
struct device *dev;
unsigned int old_link_state:1;
@@ -427,7 +428,7 @@ static void phylink_mac_pcs_an_restart(struct phylink *pl)
phy_interface_mode_is_8023z(pl->link_config.interface) &&
phylink_autoneg_inband(pl->cur_link_an_mode)) {
if (pl->pcs_ops)
- pl->pcs_ops->pcs_an_restart(pl->config);
+ pl->pcs_ops->pcs_an_restart(pl->pcs);
else
pl->mac_ops->mac_an_restart(pl->config);
}
@@ -453,7 +454,7 @@ static void phylink_major_config(struct phylink *pl, bool restart,
phylink_mac_config(pl, state);
if (pl->pcs_ops) {
- err = pl->pcs_ops->pcs_config(pl->config, pl->cur_link_an_mode,
+ err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
state->interface,
state->advertising,
!!(pl->link_config.pause &
@@ -506,7 +507,7 @@ static int phylink_change_inband_advert(struct phylink *pl)
* restart negotiation if the pcs_config() helper indicates that
* the programmed advertisement has changed.
*/
- ret = pl->pcs_ops->pcs_config(pl->config, pl->cur_link_an_mode,
+ ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
pl->link_config.interface,
pl->link_config.advertising,
!!(pl->link_config.pause & MLO_PAUSE_AN));
@@ -533,7 +534,7 @@ static void phylink_mac_pcs_get_state(struct phylink *pl,
state->link = 1;
if (pl->pcs_ops)
- pl->pcs_ops->pcs_get_state(pl->config, state);
+ pl->pcs_ops->pcs_get_state(pl->pcs, state);
else
pl->mac_ops->mac_pcs_get_state(pl->config, state);
}
@@ -604,7 +605,7 @@ static void phylink_link_up(struct phylink *pl,
pl->cur_interface = link_state.interface;
if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
- pl->pcs_ops->pcs_link_up(pl->config, pl->cur_link_an_mode,
+ pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
pl->cur_interface,
link_state.speed, link_state.duplex);
@@ -863,11 +864,26 @@ struct phylink *phylink_create(struct phylink_config *config,
}
EXPORT_SYMBOL_GPL(phylink_create);
-void phylink_add_pcs(struct phylink *pl, const struct phylink_pcs_ops *ops)
+/**
+ * phylink_set_pcs() - set the current PCS for phylink to use
+ * @pl: a pointer to a &struct phylink returned from phylink_create()
+ * @pcs: a pointer to the &struct phylink_pcs
+ *
+ * Bind the MAC PCS to phylink. This may be called after phylink_create(),
+ * in mac_prepare() or mac_config() methods if it is desired to dynamically
+ * change the PCS.
+ *
+ * Please note that there are behavioural changes with the mac_config()
+ * callback if a PCS is present (denoting a newer setup) so removing a PCS
+ * is not supported, and if a PCS is going to be used, it must be registered
+ * by calling phylink_set_pcs() at the latest in the first mac_config() call.
+ */
+void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs)
{
- pl->pcs_ops = ops;
+ pl->pcs = pcs;
+ pl->pcs_ops = pcs->ops;
}
-EXPORT_SYMBOL_GPL(phylink_add_pcs);
+EXPORT_SYMBOL_GPL(phylink_set_pcs);
/**
* phylink_destroy() - cleanup and destroy the phylink instance
@@ -1212,6 +1228,8 @@ void phylink_start(struct phylink *pl)
break;
case MLO_AN_INBAND:
poll |= pl->config->pcs_poll;
+ if (pl->pcs)
+ poll |= pl->pcs->poll;
break;
}
if (poll)
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index 2f1315f32113..057f78263a46 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -321,6 +321,21 @@ void mac_link_up(struct phylink_config *config, struct phy_device *phy,
int speed, int duplex, bool tx_pause, bool rx_pause);
#endif
+struct phylink_pcs_ops;
+
+/**
+ * struct phylink_pcs - PHYLINK PCS instance
+ * @ops: a pointer to the &struct phylink_pcs_ops structure
+ * @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.
+ */
+struct phylink_pcs {
+ const struct phylink_pcs_ops *ops;
+ bool poll;
+};
+
/**
* struct phylink_pcs_ops - MAC PCS operations structure.
* @pcs_get_state: read the current MAC PCS link state from the hardware.
@@ -330,21 +345,21 @@ void mac_link_up(struct phylink_config *config, struct phy_device *phy,
* (where necessary).
*/
struct phylink_pcs_ops {
- void (*pcs_get_state)(struct phylink_config *config,
+ void (*pcs_get_state)(struct phylink_pcs *pcs,
struct phylink_link_state *state);
- int (*pcs_config)(struct phylink_config *config, unsigned int mode,
+ int (*pcs_config)(struct phylink_pcs *pcs, unsigned int mode,
phy_interface_t interface,
const unsigned long *advertising,
bool permit_pause_to_mac);
- void (*pcs_an_restart)(struct phylink_config *config);
- void (*pcs_link_up)(struct phylink_config *config, unsigned int mode,
+ void (*pcs_an_restart)(struct phylink_pcs *pcs);
+ void (*pcs_link_up)(struct phylink_pcs *pcs, unsigned int mode,
phy_interface_t interface, int speed, int duplex);
};
#if 0 /* For kernel-doc purposes only. */
/**
* pcs_get_state() - Read the current inband link state from the hardware
- * @config: a pointer to a &struct phylink_config.
+ * @pcs: a pointer to a &struct phylink_pcs.
* @state: a pointer to a &struct phylink_link_state.
*
* Read the current inband link state from the MAC PCS, reporting the
@@ -357,12 +372,12 @@ struct phylink_pcs_ops {
* When present, this overrides mac_pcs_get_state() in &struct
* phylink_mac_ops.
*/
-void pcs_get_state(struct phylink_config *config,
+void pcs_get_state(struct phylink_pcs *pcs,
struct phylink_link_state *state);
/**
* pcs_config() - Configure the PCS mode and advertisement
- * @config: a pointer to a &struct phylink_config.
+ * @pcs: a pointer to a &struct phylink_pcs.
* @mode: one of %MLO_AN_FIXED, %MLO_AN_PHY, %MLO_AN_INBAND.
* @interface: interface mode to be used
* @advertising: adertisement ethtool link mode mask
@@ -382,21 +397,21 @@ void pcs_get_state(struct phylink_config *config,
*
* For most 10GBASE-R, there is no advertisement.
*/
-int (*pcs_config)(struct phylink_config *config, unsigned int mode,
- phy_interface_t interface, const unsigned long *advertising);
+int pcs_config(struct phylink_pcs *pcs, unsigned int mode,
+ phy_interface_t interface, const unsigned long *advertising);
/**
* pcs_an_restart() - restart 802.3z BaseX autonegotiation
- * @config: a pointer to a &struct phylink_config.
+ * @pcs: a pointer to a &struct phylink_pcs.
*
* When PCS ops are present, this overrides mac_an_restart() in &struct
* phylink_mac_ops.
*/
-void (*pcs_an_restart)(struct phylink_config *config);
+void pcs_an_restart(struct phylink_pcs *pcs);
/**
* pcs_link_up() - program the PCS for the resolved link configuration
- * @config: a pointer to a &struct phylink_config.
+ * @pcs: a pointer to a &struct phylink_pcs.
* @mode: link autonegotiation mode
* @interface: link &typedef phy_interface_t mode
* @speed: link speed
@@ -407,14 +422,14 @@ void (*pcs_an_restart)(struct phylink_config *config);
* mode without in-band AN needs to be manually configured for the link
* and duplex setting. Otherwise, this should be a no-op.
*/
-void (*pcs_link_up)(struct phylink_config *config, unsigned int mode,
- phy_interface_t interface, int speed, int duplex);
+void pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
+ phy_interface_t interface, int speed, int duplex);
#endif
struct phylink *phylink_create(struct phylink_config *, struct fwnode_handle *,
phy_interface_t iface,
const struct phylink_mac_ops *mac_ops);
-void phylink_add_pcs(struct phylink *, const struct phylink_pcs_ops *ops);
+void phylink_set_pcs(struct phylink *, struct phylink_pcs *pcs);
void phylink_destroy(struct phylink *);
int phylink_connect_phy(struct phylink *, struct phy_device *);
--
2.20.1
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