Merge branch 'net-dsa-microchip-use-phylink_mac_ops-for-ksz-driver'

Russell King says:

====================
net: dsa: microchip: use phylink_mac_ops for ksz driver

This four patch series switches the Microchip KSZ DSA driver to use
phylink_mac_ops support, and for this one we go a little further
beyond a simple conversion. This driver has four distinct cases:

lan937x
ksz9477
ksz8
ksz8830

Three of these cases are handled by shimming the existing DSA calls
through ksz_dev_ops, and the final case is handled through a
conditional in ksz_phylink_mac_config(). These can all be handled
with separate phylink_mac_ops.

To get there, we do a progressive conversion.

Patch 1 removes ksz_dev_ops' phylink_mac_config() method which is
not populated in any of the arrays - and is thus redundant.

Patch 2 switches the driver to use a common set of phylink_mac_ops
for all cases, doing the simple conversion to avoid the DSA shim.

Patch 3 pushes the phylink_mac_ops down to the first three classes
(lan937x, ksz9477, ksz8) adding an appropriate pointer to the
phylink_mac_ops to struct ksz_chip_data, and using that to
populate DSA's ds->phylink_mac_ops pointer. The difference between
each of these are the mac_link_up() method. mac_config() and
mac_link_down() remain common between each at this stage.

Patch 4 splits out ksz8830, which needs different mac_config()
handling, and thus means we have a difference in mac_config()
methods between the now four phylink_mac_ops structures.

Build tested only, with additional -Wunused-const-variable flag.
====================

Link: https://lore.kernel.org/r/ZivP/R1IwKEPb5T6@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

4 files changed, 94 insertions, 48 deletions

diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h
index 571c26ce71e47..9a286d73e9cfe 100644
--- a/drivers/net/dsa/microchip/ksz8.h
+++ b/drivers/net/dsa/microchip/ksz8.h
@@ -54,9 +54,9 @@ int ksz8_reset_switch(struct ksz_device *dev);
 int ksz8_switch_init(struct ksz_device *dev);
 void ksz8_switch_exit(struct ksz_device *dev);
 int ksz8_change_mtu(struct ksz_device *dev, int port, int mtu);
-void ksz8_phylink_mac_link_up(struct ksz_device *dev, int port,
-			      unsigned int mode, phy_interface_t interface,
-			      struct phy_device *phydev, int speed, int duplex,
+void ksz8_phylink_mac_link_up(struct phylink_config *config,
+			      struct phy_device *phydev, unsigned int mode,
+			      phy_interface_t interface, int speed, int duplex,
 			      bool tx_pause, bool rx_pause);
 
 #endif
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index ecef6f6f830b3..b2f66cc752082 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1702,11 +1702,15 @@ static void ksz8_cpu_port_link_up(struct ksz_device *dev, int speed, int duplex,
 		 SW_10_MBIT, ctrl);
 }
 
-void ksz8_phylink_mac_link_up(struct ksz_device *dev, int port,
-			      unsigned int mode, phy_interface_t interface,
-			      struct phy_device *phydev, int speed, int duplex,
+void ksz8_phylink_mac_link_up(struct phylink_config *config,
+			      struct phy_device *phydev, unsigned int mode,
+			      phy_interface_t interface, int speed, int duplex,
 			      bool tx_pause, bool rx_pause)
 {
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct ksz_device *dev = dp->ds->priv;
+	int port = dp->index;
+
 	/* If the port is the CPU port, apply special handling. Only the CPU
 	 * port is configured via global registers.
 	 */
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 2b510f150dd88..2bb8e8f9e49fb 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -253,6 +253,28 @@ static const struct ksz_drive_strength ksz8830_drive_strengths[] = {
 	{ KSZ8873_DRIVE_STRENGTH_16MA, 16000 },
 };
 
+static void ksz8830_phylink_mac_config(struct phylink_config *config,
+				       unsigned int mode,
+				       const struct phylink_link_state *state);
+static void ksz_phylink_mac_config(struct phylink_config *config,
+				   unsigned int mode,
+				   const struct phylink_link_state *state);
+static void ksz_phylink_mac_link_down(struct phylink_config *config,
+				      unsigned int mode,
+				      phy_interface_t interface);
+
+static const struct phylink_mac_ops ksz8830_phylink_mac_ops = {
+	.mac_config	= ksz8830_phylink_mac_config,
+	.mac_link_down	= ksz_phylink_mac_link_down,
+	.mac_link_up	= ksz8_phylink_mac_link_up,
+};
+
+static const struct phylink_mac_ops ksz8_phylink_mac_ops = {
+	.mac_config	= ksz_phylink_mac_config,
+	.mac_link_down	= ksz_phylink_mac_link_down,
+	.mac_link_up	= ksz8_phylink_mac_link_up,
+};
+
 static const struct ksz_dev_ops ksz8_dev_ops = {
 	.setup = ksz8_setup,
 	.get_port_addr = ksz8_get_port_addr,
@@ -277,7 +299,6 @@ static const struct ksz_dev_ops ksz8_dev_ops = {
 	.mirror_add = ksz8_port_mirror_add,
 	.mirror_del = ksz8_port_mirror_del,
 	.get_caps = ksz8_get_caps,
-	.phylink_mac_link_up = ksz8_phylink_mac_link_up,
 	.config_cpu_port = ksz8_config_cpu_port,
 	.enable_stp_addr = ksz8_enable_stp_addr,
 	.reset = ksz8_reset_switch,
@@ -286,13 +307,19 @@ static const struct ksz_dev_ops ksz8_dev_ops = {
 	.change_mtu = ksz8_change_mtu,
 };
 
-static void ksz9477_phylink_mac_link_up(struct ksz_device *dev, int port,
+static void ksz9477_phylink_mac_link_up(struct phylink_config *config,
+					struct phy_device *phydev,
 					unsigned int mode,
 					phy_interface_t interface,
-					struct phy_device *phydev, int speed,
-					int duplex, bool tx_pause,
+					int speed, int duplex, bool tx_pause,
 					bool rx_pause);
 
+static const struct phylink_mac_ops ksz9477_phylink_mac_ops = {
+	.mac_config	= ksz_phylink_mac_config,
+	.mac_link_down	= ksz_phylink_mac_link_down,
+	.mac_link_up	= ksz9477_phylink_mac_link_up,
+};
+
 static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.setup = ksz9477_setup,
 	.get_port_addr = ksz9477_get_port_addr,
@@ -319,7 +346,6 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.mdb_add = ksz9477_mdb_add,
 	.mdb_del = ksz9477_mdb_del,
 	.change_mtu = ksz9477_change_mtu,
-	.phylink_mac_link_up = ksz9477_phylink_mac_link_up,
 	.get_wol = ksz9477_get_wol,
 	.set_wol = ksz9477_set_wol,
 	.wol_pre_shutdown = ksz9477_wol_pre_shutdown,
@@ -331,6 +357,12 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.exit = ksz9477_switch_exit,
 };
 
+static const struct phylink_mac_ops lan937x_phylink_mac_ops = {
+	.mac_config	= ksz_phylink_mac_config,
+	.mac_link_down	= ksz_phylink_mac_link_down,
+	.mac_link_up	= ksz9477_phylink_mac_link_up,
+};
+
 static const struct ksz_dev_ops lan937x_dev_ops = {
 	.setup = lan937x_setup,
 	.teardown = lan937x_teardown,
@@ -359,7 +391,6 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
 	.mdb_add = ksz9477_mdb_add,
 	.mdb_del = ksz9477_mdb_del,
 	.change_mtu = lan937x_change_mtu,
-	.phylink_mac_link_up = ksz9477_phylink_mac_link_up,
 	.config_cpu_port = lan937x_config_cpu_port,
 	.tc_cbs_set_cinc = lan937x_tc_cbs_set_cinc,
 	.enable_stp_addr = ksz9477_enable_stp_addr,
@@ -1197,6 +1228,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1224,6 +1256,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 5,		/* total cpu and user ports */
 		.num_tx_queues = 4,
 		.ops = &ksz8_dev_ops,
+		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1263,6 +1296,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 5,		/* total cpu and user ports */
 		.num_tx_queues = 4,
 		.ops = &ksz8_dev_ops,
+		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1288,6 +1322,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 5,		/* total cpu and user ports */
 		.num_tx_queues = 4,
 		.ops = &ksz8_dev_ops,
+		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
@@ -1313,6 +1348,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 3,
 		.num_tx_queues = 4,
 		.ops = &ksz8_dev_ops,
+		.phylink_mac_ops = &ksz8830_phylink_mac_ops,
 		.mib_names = ksz88xx_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1339,6 +1375,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1371,6 +1408,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_nirqs = 2,
 		.num_tx_queues = 4,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1403,6 +1441,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_nirqs = 2,
 		.num_tx_queues = 4,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1433,6 +1472,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_nirqs = 2,
 		.num_tx_queues = 4,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1461,6 +1501,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1489,6 +1530,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &ksz9477_dev_ops,
+		.phylink_mac_ops = &ksz9477_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1554,6 +1596,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &lan937x_dev_ops,
+		.phylink_mac_ops = &lan937x_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1581,6 +1624,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &lan937x_dev_ops,
+		.phylink_mac_ops = &lan937x_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1608,6 +1652,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &lan937x_dev_ops,
+		.phylink_mac_ops = &lan937x_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1639,6 +1684,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &lan937x_dev_ops,
+		.phylink_mac_ops = &lan937x_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -1670,6 +1716,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.tc_cbs_supported = true,
 		.tc_ets_supported = true,
 		.ops = &lan937x_dev_ops,
+		.phylink_mac_ops = &lan937x_phylink_mac_ops,
 		.mib_names = ksz9477_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
@@ -2523,14 +2570,15 @@ static u32 ksz_get_phy_flags(struct dsa_switch *ds, int port)
 	return 0;
 }
 
-static void ksz_mac_link_down(struct dsa_switch *ds, int port,
-			      unsigned int mode, phy_interface_t interface)
+static void ksz_phylink_mac_link_down(struct phylink_config *config,
+				      unsigned int mode,
+				      phy_interface_t interface)
 {
-	struct ksz_device *dev = ds->priv;
-	struct ksz_port *p = &dev->ports[port];
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct ksz_device *dev = dp->ds->priv;
 
 	/* Read all MIB counters when the link is going down. */
-	p->read = true;
+	dev->ports[dp->index].read = true;
 	/* timer started */
 	if (dev->mib_read_interval)
 		schedule_delayed_work(&dev->mib_read, 0);
@@ -3065,16 +3113,23 @@ phy_interface_t ksz_get_xmii(struct ksz_device *dev, int port, bool gbit)
 	return interface;
 }
 
-static void ksz_phylink_mac_config(struct dsa_switch *ds, int port,
+static void ksz8830_phylink_mac_config(struct phylink_config *config,
+				       unsigned int mode,
+				       const struct phylink_link_state *state)
+{
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct ksz_device *dev = dp->ds->priv;
+
+	dev->ports[dp->index].manual_flow = !(state->pause & MLO_PAUSE_AN);
+}
+
+static void ksz_phylink_mac_config(struct phylink_config *config,
 				   unsigned int mode,
 				   const struct phylink_link_state *state)
 {
-	struct ksz_device *dev = ds->priv;
-
-	if (ksz_is_ksz88x3(dev)) {
-		dev->ports[port].manual_flow = !(state->pause & MLO_PAUSE_AN);
-		return;
-	}
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct ksz_device *dev = dp->ds->priv;
+	int port = dp->index;
 
 	/* Internal PHYs */
 	if (dev->info->internal_phy[port])
@@ -3087,9 +3142,6 @@ static void ksz_phylink_mac_config(struct dsa_switch *ds, int port,
 
 	ksz_set_xmii(dev, port, state->interface);
 
-	if (dev->dev_ops->phylink_mac_config)
-		dev->dev_ops->phylink_mac_config(dev, port, mode, state);
-
 	if (dev->dev_ops->setup_rgmii_delay)
 		dev->dev_ops->setup_rgmii_delay(dev, port);
 }
@@ -3187,13 +3239,16 @@ static void ksz_duplex_flowctrl(struct ksz_device *dev, int port, int duplex,
 	ksz_prmw8(dev, port, regs[P_XMII_CTRL_0], mask, val);
 }
 
-static void ksz9477_phylink_mac_link_up(struct ksz_device *dev, int port,
+static void ksz9477_phylink_mac_link_up(struct phylink_config *config,
+					struct phy_device *phydev,
 					unsigned int mode,
 					phy_interface_t interface,
-					struct phy_device *phydev, int speed,
-					int duplex, bool tx_pause,
+					int speed, int duplex, bool tx_pause,
 					bool rx_pause)
 {
+	struct dsa_port *dp = dsa_phylink_to_port(config);
+	struct ksz_device *dev = dp->ds->priv;
+	int port = dp->index;
 	struct ksz_port *p;
 
 	p = &dev->ports[port];
@@ -3209,18 +3264,6 @@ static void ksz9477_phylink_mac_link_up(struct ksz_device *dev, int port,
 	ksz_duplex_flowctrl(dev, port, duplex, tx_pause, rx_pause);
 }
 
-static void ksz_phylink_mac_link_up(struct dsa_switch *ds, int port,
-				    unsigned int mode,
-				    phy_interface_t interface,
-				    struct phy_device *phydev, int speed,
-				    int duplex, bool tx_pause, bool rx_pause)
-{
-	struct ksz_device *dev = ds->priv;
-
-	dev->dev_ops->phylink_mac_link_up(dev, port, mode, interface, phydev,
-					  speed, duplex, tx_pause, rx_pause);
-}
-
 static int ksz_switch_detect(struct ksz_device *dev)
 {
 	u8 id1, id2, id4;
@@ -3881,9 +3924,6 @@ static const struct dsa_switch_ops ksz_switch_ops = {
 	.phy_read		= ksz_phy_read16,
 	.phy_write		= ksz_phy_write16,
 	.phylink_get_caps	= ksz_phylink_get_caps,
-	.phylink_mac_config	= ksz_phylink_mac_config,
-	.phylink_mac_link_up	= ksz_phylink_mac_link_up,
-	.phylink_mac_link_down	= ksz_mac_link_down,
 	.port_setup		= ksz_port_setup,
 	.set_ageing_time	= ksz_set_ageing_time,
 	.get_strings		= ksz_get_strings,
@@ -4328,6 +4368,9 @@ int ksz_switch_register(struct ksz_device *dev)
 	/* set the real number of ports */
 	dev->ds->num_ports = dev->info->port_cnt;
 
+	/* set the phylink ops */
+	dev->ds->phylink_mac_ops = dev->info->phylink_mac_ops;
+
 	/* Host port interface will be self detected, or specifically set in
 	 * device tree.
 	 */
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 40c11b0d6b625..9409b844af635 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -22,6 +22,7 @@
 
 struct ksz_device;
 struct ksz_port;
+struct phylink_mac_ops;
 
 enum ksz_regmap_width {
 	KSZ_REGMAP_8,
@@ -61,6 +62,7 @@ struct ksz_chip_data {
 	bool tc_cbs_supported;
 	bool tc_ets_supported;
 	const struct ksz_dev_ops *ops;
+	const struct phylink_mac_ops *phylink_mac_ops;
 	bool ksz87xx_eee_link_erratum;
 	const struct ksz_mib_names *mib_names;
 	int mib_cnt;
@@ -349,9 +351,6 @@ struct ksz_dev_ops {
 	int (*change_mtu)(struct ksz_device *dev, int port, int mtu);
 	void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
 	void (*port_init_cnt)(struct ksz_device *dev, int port);
-	void (*phylink_mac_config)(struct ksz_device *dev, int port,
-				   unsigned int mode,
-				   const struct phylink_link_state *state);
 	void (*phylink_mac_link_up)(struct ksz_device *dev, int port,
 				    unsigned int mode,
 				    phy_interface_t interface,