Message-Id: <20170411205237.29309-1-vivien.didelot@savoirfairelinux.com>
Date:   Tue, 11 Apr 2017 16:52:37 -0400
From:   Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next] net: dsa: add CONFIG_NET_DSA_LEGACY

This patch moves as is the legacy DSA code from dsa.c to legacy.c,
except the few shared symbols which remain in dsa.c.

Compile legacy.o only if a new CONFIG_NET_DSA_LEGACY symbol is enabled,
which is true by default.

DSA drivers without legacy support don't need the probe function as well
as driver registration helpers anymore, so remove their definitions if
CONFIG_NET_DSA_LEGACY is disabled.

NET_DSA_MV88E6060 and NET_DSA_BCM_SF2 now depend on the legacy support.

Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
 drivers/net/dsa/Kconfig          |   4 +-
 drivers/net/dsa/mv88e6xxx/chip.c |  10 +
 include/net/dsa.h                |   5 +
 net/dsa/Kconfig                  |   8 +
 net/dsa/Makefile                 |   1 +
 net/dsa/dsa.c                    | 772 +--------------------------------------
 net/dsa/dsa_priv.h               |   6 +
 net/dsa/{dsa.c => legacy.c}      | 211 +----------
 8 files changed, 42 insertions(+), 975 deletions(-)
 copy net/dsa/{dsa.c => legacy.c} (79%)

diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig
index 31a2b229106d..5a409e25fb67 100644
--- a/drivers/net/dsa/Kconfig
+++ b/drivers/net/dsa/Kconfig
@@ -3,7 +3,7 @@ menu "Distributed Switch Architecture drivers"
 
 config NET_DSA_MV88E6060
 	tristate "Marvell 88E6060 ethernet switch chip support"
-	depends on NET_DSA
+	depends on NET_DSA_LEGACY
 	select NET_DSA_TAG_TRAILER
 	---help---
 	  This enables support for the Marvell 88E6060 ethernet switch
@@ -11,7 +11,7 @@ config NET_DSA_MV88E6060
 
 config NET_DSA_BCM_SF2
 	tristate "Broadcom Starfighter 2 Ethernet switch support"
-	depends on HAS_IOMEM && NET_DSA && OF_MDIO
+	depends on HAS_IOMEM && NET_DSA_LEGACY && OF_MDIO
 	select NET_DSA_TAG_BRCM
 	select FIXED_PHY
 	select BCM7XXX_PHY
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 44ba8cff5631..907202f04780 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4209,6 +4209,7 @@ static enum dsa_tag_protocol mv88e6xxx_get_tag_protocol(struct dsa_switch *ds)
 	return chip->info->tag_protocol;
 }
 
+#ifdef CONFIG_NET_DSA_LEGACY
 static const char *mv88e6xxx_drv_probe(struct device *dsa_dev,
 				       struct device *host_dev, int sw_addr,
 				       void **priv)
@@ -4256,6 +4257,7 @@ static const char *mv88e6xxx_drv_probe(struct device *dsa_dev,
 
 	return NULL;
 }
+#endif /* CONFIG_NET_DSA_LEGACY */
 
 static int mv88e6xxx_port_mdb_prepare(struct dsa_switch *ds, int port,
 				      const struct switchdev_obj_port_mdb *mdb,
@@ -4310,7 +4312,9 @@ static int mv88e6xxx_port_mdb_dump(struct dsa_switch *ds, int port,
 }
 
 static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
+#ifdef CONFIG_NET_DSA_LEGACY
 	.probe			= mv88e6xxx_drv_probe,
+#endif /* CONFIG_NET_DSA_LEGACY */
 	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,
 	.setup			= mv88e6xxx_setup,
 	.set_addr		= mv88e6xxx_set_addr,
@@ -4347,9 +4351,11 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.crosschip_bridge_leave	= mv88e6xxx_crosschip_bridge_leave,
 };
 
+#ifdef CONFIG_NET_DSA_LEGACY
 static struct dsa_switch_driver mv88e6xxx_switch_drv = {
 	.ops			= &mv88e6xxx_switch_ops,
 };
+#endif /* CONFIG_NET_DSA_LEGACY */
 
 static int mv88e6xxx_register_switch(struct mv88e6xxx_chip *chip)
 {
@@ -4507,6 +4513,7 @@ static struct mdio_driver mv88e6xxx_driver = {
 	},
 };
 
+#ifdef CONFIG_NET_DSA_LEGACY
 static int __init mv88e6xxx_init(void)
 {
 	register_switch_driver(&mv88e6xxx_switch_drv);
@@ -4520,6 +4527,9 @@ static void __exit mv88e6xxx_cleanup(void)
 	unregister_switch_driver(&mv88e6xxx_switch_drv);
 }
 module_exit(mv88e6xxx_cleanup);
+#else
+mdio_module_driver(mv88e6xxx_driver);
+#endif /* CONFIG_NET_DSA_LEGACY */
 
 MODULE_AUTHOR("Lennert Buytenhek <buytenh@...tstofly.org>");
 MODULE_DESCRIPTION("Driver for Marvell 88E6XXX ethernet switch chips");
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 9b1c1eb4147a..3c919d5cffe9 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -304,9 +304,11 @@ struct dsa_switch_ops {
 	/*
 	 * Probing and setup.
 	 */
+#ifdef CONFIG_NET_DSA_LEGACY
 	const char	*(*probe)(struct device *dsa_dev,
 				  struct device *host_dev, int sw_addr,
 				  void **priv);
+#endif /* CONFIG_NET_DSA_LEGACY */
 
 	enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);
 
@@ -472,9 +474,12 @@ struct dsa_switch_driver {
 	const struct dsa_switch_ops *ops;
 };
 
+#ifdef CONFIG_NET_DSA_LEGACY
 void register_switch_driver(struct dsa_switch_driver *type);
 void unregister_switch_driver(struct dsa_switch_driver *type);
 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
+#endif /* CONFIG_NET_DSA_LEGACY */
+
 struct net_device *dsa_dev_to_net_device(struct device *dev);
 
 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index aa21f49f1215..287093ab384b 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -15,6 +15,14 @@ config NET_DSA
 
 if NET_DSA
 
+config NET_DSA_LEGACY
+	bool "Legacy DSA support"
+	default y
+	depends on NET_DSA
+	---help---
+	  Say Y if you want to enable legacy support for DSA, where switches
+	  are not considered true Linux bus devices.
+
 # tagging formats
 config NET_DSA_TAG_BRCM
 	bool
diff --git a/net/dsa/Makefile b/net/dsa/Makefile
index 9b1d478f3713..612453388fc8 100644
--- a/net/dsa/Makefile
+++ b/net/dsa/Makefile
@@ -1,6 +1,7 @@
 # the core
 obj-$(CONFIG_NET_DSA) += dsa_core.o
 dsa_core-y += dsa.o slave.o dsa2.o switch.o
+dsa_core-$(CONFIG_NET_DSA_LEGACY) += legacy.o
 
 # tagging formats
 dsa_core-$(CONFIG_NET_DSA_TAG_BRCM) += tag_brcm.o
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 1fb9cf7aaaf4..668a8851888a 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -61,59 +61,6 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
 	[DSA_TAG_PROTO_NONE] = &none_ops,
 };
 
-/* switch driver registration ***********************************************/
-static DEFINE_MUTEX(dsa_switch_drivers_mutex);
-static LIST_HEAD(dsa_switch_drivers);
-
-void register_switch_driver(struct dsa_switch_driver *drv)
-{
-	mutex_lock(&dsa_switch_drivers_mutex);
-	list_add_tail(&drv->list, &dsa_switch_drivers);
-	mutex_unlock(&dsa_switch_drivers_mutex);
-}
-EXPORT_SYMBOL_GPL(register_switch_driver);
-
-void unregister_switch_driver(struct dsa_switch_driver *drv)
-{
-	mutex_lock(&dsa_switch_drivers_mutex);
-	list_del_init(&drv->list);
-	mutex_unlock(&dsa_switch_drivers_mutex);
-}
-EXPORT_SYMBOL_GPL(unregister_switch_driver);
-
-static const struct dsa_switch_ops *
-dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
-		 const char **_name, void **priv)
-{
-	const struct dsa_switch_ops *ret;
-	struct list_head *list;
-	const char *name;
-
-	ret = NULL;
-	name = NULL;
-
-	mutex_lock(&dsa_switch_drivers_mutex);
-	list_for_each(list, &dsa_switch_drivers) {
-		const struct dsa_switch_ops *ops;
-		struct dsa_switch_driver *drv;
-
-		drv = list_entry(list, struct dsa_switch_driver, list);
-		ops = drv->ops;
-
-		name = ops->probe(parent, host_dev, sw_addr, priv);
-		if (name != NULL) {
-			ret = ops;
-			break;
-		}
-	}
-	mutex_unlock(&dsa_switch_drivers_mutex);
-
-	*_name = name;
-
-	return ret;
-}
-
-/* basic switch operations **************************************************/
 int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
 		      struct dsa_port *dport, int port)
 {
@@ -145,23 +92,6 @@ int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
 	return 0;
 }
 
-static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
-{
-	struct dsa_port *dport;
-	int ret, port;
-
-	for (port = 0; port < ds->num_ports; port++) {
-		if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
-			continue;
-
-		dport = &ds->ports[port];
-		ret = dsa_cpu_dsa_setup(ds, dev, dport, port);
-		if (ret)
-			return ret;
-	}
-	return 0;
-}
-
 const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
 {
 	const struct dsa_device_ops *ops;
@@ -211,168 +141,6 @@ void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
 	master->ethtool_ops = ds->dst->master_orig_ethtool_ops;
 }
 
-static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
-{
-	const struct dsa_switch_ops *ops = ds->ops;
-	struct dsa_switch_tree *dst = ds->dst;
-	struct dsa_chip_data *cd = ds->cd;
-	bool valid_name_found = false;
-	int index = ds->index;
-	int i, ret;
-
-	/*
-	 * Validate supplied switch configuration.
-	 */
-	for (i = 0; i < ds->num_ports; i++) {
-		char *name;
-
-		name = cd->port_names[i];
-		if (name == NULL)
-			continue;
-
-		if (!strcmp(name, "cpu")) {
-			if (dst->cpu_switch) {
-				netdev_err(dst->master_netdev,
-					   "multiple cpu ports?!\n");
-				return -EINVAL;
-			}
-			dst->cpu_switch = ds;
-			dst->cpu_port = i;
-			ds->cpu_port_mask |= 1 << i;
-		} else if (!strcmp(name, "dsa")) {
-			ds->dsa_port_mask |= 1 << i;
-		} else {
-			ds->enabled_port_mask |= 1 << i;
-		}
-		valid_name_found = true;
-	}
-
-	if (!valid_name_found && i == ds->num_ports)
-		return -EINVAL;
-
-	/* Make the built-in MII bus mask match the number of ports,
-	 * switch drivers can override this later
-	 */
-	ds->phys_mii_mask = ds->enabled_port_mask;
-
-	/*
-	 * If the CPU connects to this switch, set the switch tree
-	 * tagging protocol to the preferred tagging format of this
-	 * switch.
-	 */
-	if (dst->cpu_switch == ds) {
-		enum dsa_tag_protocol tag_protocol;
-
-		tag_protocol = ops->get_tag_protocol(ds);
-		dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
-		if (IS_ERR(dst->tag_ops))
-			return PTR_ERR(dst->tag_ops);
-
-		dst->rcv = dst->tag_ops->rcv;
-	}
-
-	memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
-
-	/*
-	 * Do basic register setup.
-	 */
-	ret = ops->setup(ds);
-	if (ret < 0)
-		return ret;
-
-	ret = dsa_switch_register_notifier(ds);
-	if (ret)
-		return ret;
-
-	if (ops->set_addr) {
-		ret = ops->set_addr(ds, dst->master_netdev->dev_addr);
-		if (ret < 0)
-			return ret;
-	}
-
-	if (!ds->slave_mii_bus && ops->phy_read) {
-		ds->slave_mii_bus = devm_mdiobus_alloc(parent);
-		if (!ds->slave_mii_bus)
-			return -ENOMEM;
-		dsa_slave_mii_bus_init(ds);
-
-		ret = mdiobus_register(ds->slave_mii_bus);
-		if (ret < 0)
-			return ret;
-	}
-
-	/*
-	 * Create network devices for physical switch ports.
-	 */
-	for (i = 0; i < ds->num_ports; i++) {
-		ds->ports[i].dn = cd->port_dn[i];
-
-		if (!(ds->enabled_port_mask & (1 << i)))
-			continue;
-
-		ret = dsa_slave_create(ds, parent, i, cd->port_names[i]);
-		if (ret < 0)
-			netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
-				   index, i, cd->port_names[i], ret);
-	}
-
-	/* Perform configuration of the CPU and DSA ports */
-	ret = dsa_cpu_dsa_setups(ds, parent);
-	if (ret < 0)
-		netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n",
-			   index);
-
-	ret = dsa_cpu_port_ethtool_setup(ds);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-static struct dsa_switch *
-dsa_switch_setup(struct dsa_switch_tree *dst, int index,
-		 struct device *parent, struct device *host_dev)
-{
-	struct dsa_chip_data *cd = dst->pd->chip + index;
-	const struct dsa_switch_ops *ops;
-	struct dsa_switch *ds;
-	int ret;
-	const char *name;
-	void *priv;
-
-	/*
-	 * Probe for switch model.
-	 */
-	ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
-	if (!ops) {
-		netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
-			   index);
-		return ERR_PTR(-EINVAL);
-	}
-	netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
-		    index, name);
-
-
-	/*
-	 * Allocate and initialise switch state.
-	 */
-	ds = dsa_switch_alloc(parent, DSA_MAX_PORTS);
-	if (!ds)
-		return ERR_PTR(-ENOMEM);
-
-	ds->dst = dst;
-	ds->index = index;
-	ds->cd = cd;
-	ds->ops = ops;
-	ds->priv = priv;
-
-	ret = dsa_switch_setup_one(ds, parent);
-	if (ret)
-		return ERR_PTR(ret);
-
-	return ds;
-}
-
 void dsa_cpu_dsa_destroy(struct dsa_port *port)
 {
 	struct device_node *port_dn = port->dn;
@@ -381,86 +149,6 @@ void dsa_cpu_dsa_destroy(struct dsa_port *port)
 		of_phy_deregister_fixed_link(port_dn);
 }
 
-static void dsa_switch_destroy(struct dsa_switch *ds)
-{
-	int port;
-
-	/* Destroy network devices for physical switch ports. */
-	for (port = 0; port < ds->num_ports; port++) {
-		if (!(ds->enabled_port_mask & (1 << port)))
-			continue;
-
-		if (!ds->ports[port].netdev)
-			continue;
-
-		dsa_slave_destroy(ds->ports[port].netdev);
-	}
-
-	/* Disable configuration of the CPU and DSA ports */
-	for (port = 0; port < ds->num_ports; port++) {
-		if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
-			continue;
-		dsa_cpu_dsa_destroy(&ds->ports[port]);
-
-		/* Clearing a bit which is not set does no harm */
-		ds->cpu_port_mask |= ~(1 << port);
-		ds->dsa_port_mask |= ~(1 << port);
-	}
-
-	if (ds->slave_mii_bus && ds->ops->phy_read)
-		mdiobus_unregister(ds->slave_mii_bus);
-
-	dsa_switch_unregister_notifier(ds);
-}
-
-#ifdef CONFIG_PM_SLEEP
-int dsa_switch_suspend(struct dsa_switch *ds)
-{
-	int i, ret = 0;
-
-	/* Suspend slave network devices */
-	for (i = 0; i < ds->num_ports; i++) {
-		if (!dsa_is_port_initialized(ds, i))
-			continue;
-
-		ret = dsa_slave_suspend(ds->ports[i].netdev);
-		if (ret)
-			return ret;
-	}
-
-	if (ds->ops->suspend)
-		ret = ds->ops->suspend(ds);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(dsa_switch_suspend);
-
-int dsa_switch_resume(struct dsa_switch *ds)
-{
-	int i, ret = 0;
-
-	if (ds->ops->resume)
-		ret = ds->ops->resume(ds);
-
-	if (ret)
-		return ret;
-
-	/* Resume slave network devices */
-	for (i = 0; i < ds->num_ports; i++) {
-		if (!dsa_is_port_initialized(ds, i))
-			continue;
-
-		ret = dsa_slave_resume(ds->ports[i].netdev);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(dsa_switch_resume);
-#endif
-
-/* platform driver init and cleanup *****************************************/
 static int dev_is_class(struct device *dev, void *class)
 {
 	if (dev->class != NULL && !strcmp(dev->class->name, class))
@@ -479,24 +167,6 @@ static struct device *dev_find_class(struct device *parent, char *class)
 	return device_find_child(parent, class, dev_is_class);
 }
 
-struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
-{
-	struct device *d;
-
-	d = dev_find_class(dev, "mdio_bus");
-	if (d != NULL) {
-		struct mii_bus *bus;
-
-		bus = to_mii_bus(d);
-		put_device(d);
-
-		return bus;
-	}
-
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
-
 struct net_device *dsa_dev_to_net_device(struct device *dev)
 {
 	struct device *d;
@@ -516,387 +186,6 @@ struct net_device *dsa_dev_to_net_device(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
 
-#ifdef CONFIG_OF
-static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
-					struct dsa_chip_data *cd,
-					int chip_index, int port_index,
-					struct device_node *link)
-{
-	const __be32 *reg;
-	int link_sw_addr;
-	struct device_node *parent_sw;
-	int len;
-
-	parent_sw = of_get_parent(link);
-	if (!parent_sw)
-		return -EINVAL;
-
-	reg = of_get_property(parent_sw, "reg", &len);
-	if (!reg || (len != sizeof(*reg) * 2))
-		return -EINVAL;
-
-	/*
-	 * Get the destination switch number from the second field of its 'reg'
-	 * property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
-	 */
-	link_sw_addr = be32_to_cpup(reg + 1);
-
-	if (link_sw_addr >= pd->nr_chips)
-		return -EINVAL;
-
-	cd->rtable[link_sw_addr] = port_index;
-
-	return 0;
-}
-
-static int dsa_of_probe_links(struct dsa_platform_data *pd,
-			      struct dsa_chip_data *cd,
-			      int chip_index, int port_index,
-			      struct device_node *port,
-			      const char *port_name)
-{
-	struct device_node *link;
-	int link_index;
-	int ret;
-
-	for (link_index = 0;; link_index++) {
-		link = of_parse_phandle(port, "link", link_index);
-		if (!link)
-			break;
-
-		if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) {
-			ret = dsa_of_setup_routing_table(pd, cd, chip_index,
-							 port_index, link);
-			if (ret)
-				return ret;
-		}
-	}
-	return 0;
-}
-
-static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
-{
-	int i;
-	int port_index;
-
-	for (i = 0; i < pd->nr_chips; i++) {
-		port_index = 0;
-		while (port_index < DSA_MAX_PORTS) {
-			kfree(pd->chip[i].port_names[port_index]);
-			port_index++;
-		}
-
-		/* Drop our reference to the MDIO bus device */
-		if (pd->chip[i].host_dev)
-			put_device(pd->chip[i].host_dev);
-	}
-	kfree(pd->chip);
-}
-
-static int dsa_of_probe(struct device *dev)
-{
-	struct device_node *np = dev->of_node;
-	struct device_node *child, *mdio, *ethernet, *port;
-	struct mii_bus *mdio_bus, *mdio_bus_switch;
-	struct net_device *ethernet_dev;
-	struct dsa_platform_data *pd;
-	struct dsa_chip_data *cd;
-	const char *port_name;
-	int chip_index, port_index;
-	const unsigned int *sw_addr, *port_reg;
-	u32 eeprom_len;
-	int ret;
-
-	mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
-	if (!mdio)
-		return -EINVAL;
-
-	mdio_bus = of_mdio_find_bus(mdio);
-	if (!mdio_bus)
-		return -EPROBE_DEFER;
-
-	ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
-	if (!ethernet) {
-		ret = -EINVAL;
-		goto out_put_mdio;
-	}
-
-	ethernet_dev = of_find_net_device_by_node(ethernet);
-	if (!ethernet_dev) {
-		ret = -EPROBE_DEFER;
-		goto out_put_mdio;
-	}
-
-	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
-	if (!pd) {
-		ret = -ENOMEM;
-		goto out_put_ethernet;
-	}
-
-	dev->platform_data = pd;
-	pd->of_netdev = ethernet_dev;
-	pd->nr_chips = of_get_available_child_count(np);
-	if (pd->nr_chips > DSA_MAX_SWITCHES)
-		pd->nr_chips = DSA_MAX_SWITCHES;
-
-	pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
-			   GFP_KERNEL);
-	if (!pd->chip) {
-		ret = -ENOMEM;
-		goto out_free;
-	}
-
-	chip_index = -1;
-	for_each_available_child_of_node(np, child) {
-		int i;
-
-		chip_index++;
-		cd = &pd->chip[chip_index];
-
-		cd->of_node = child;
-
-		/* Initialize the routing table */
-		for (i = 0; i < DSA_MAX_SWITCHES; ++i)
-			cd->rtable[i] = DSA_RTABLE_NONE;
-
-		/* When assigning the host device, increment its refcount */
-		cd->host_dev = get_device(&mdio_bus->dev);
-
-		sw_addr = of_get_property(child, "reg", NULL);
-		if (!sw_addr)
-			continue;
-
-		cd->sw_addr = be32_to_cpup(sw_addr);
-		if (cd->sw_addr >= PHY_MAX_ADDR)
-			continue;
-
-		if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
-			cd->eeprom_len = eeprom_len;
-
-		mdio = of_parse_phandle(child, "mii-bus", 0);
-		if (mdio) {
-			mdio_bus_switch = of_mdio_find_bus(mdio);
-			if (!mdio_bus_switch) {
-				ret = -EPROBE_DEFER;
-				goto out_free_chip;
-			}
-
-			/* Drop the mdio_bus device ref, replacing the host
-			 * device with the mdio_bus_switch device, keeping
-			 * the refcount from of_mdio_find_bus() above.
-			 */
-			put_device(cd->host_dev);
-			cd->host_dev = &mdio_bus_switch->dev;
-		}
-
-		for_each_available_child_of_node(child, port) {
-			port_reg = of_get_property(port, "reg", NULL);
-			if (!port_reg)
-				continue;
-
-			port_index = be32_to_cpup(port_reg);
-			if (port_index >= DSA_MAX_PORTS)
-				break;
-
-			port_name = of_get_property(port, "label", NULL);
-			if (!port_name)
-				continue;
-
-			cd->port_dn[port_index] = port;
-
-			cd->port_names[port_index] = kstrdup(port_name,
-					GFP_KERNEL);
-			if (!cd->port_names[port_index]) {
-				ret = -ENOMEM;
-				goto out_free_chip;
-			}
-
-			ret = dsa_of_probe_links(pd, cd, chip_index,
-						 port_index, port, port_name);
-			if (ret)
-				goto out_free_chip;
-
-		}
-	}
-
-	/* The individual chips hold their own refcount on the mdio bus,
-	 * so drop ours */
-	put_device(&mdio_bus->dev);
-
-	return 0;
-
-out_free_chip:
-	dsa_of_free_platform_data(pd);
-out_free:
-	kfree(pd);
-	dev->platform_data = NULL;
-out_put_ethernet:
-	put_device(&ethernet_dev->dev);
-out_put_mdio:
-	put_device(&mdio_bus->dev);
-	return ret;
-}
-
-static void dsa_of_remove(struct device *dev)
-{
-	struct dsa_platform_data *pd = dev->platform_data;
-
-	if (!dev->of_node)
-		return;
-
-	dsa_of_free_platform_data(pd);
-	put_device(&pd->of_netdev->dev);
-	kfree(pd);
-}
-#else
-static inline int dsa_of_probe(struct device *dev)
-{
-	return 0;
-}
-
-static inline void dsa_of_remove(struct device *dev)
-{
-}
-#endif
-
-static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
-			 struct device *parent, struct dsa_platform_data *pd)
-{
-	int i;
-	unsigned configured = 0;
-
-	dst->pd = pd;
-	dst->master_netdev = dev;
-	dst->cpu_port = -1;
-
-	for (i = 0; i < pd->nr_chips; i++) {
-		struct dsa_switch *ds;
-
-		ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev);
-		if (IS_ERR(ds)) {
-			netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
-				   i, PTR_ERR(ds));
-			continue;
-		}
-
-		dst->ds[i] = ds;
-
-		++configured;
-	}
-
-	/*
-	 * If no switch was found, exit cleanly
-	 */
-	if (!configured)
-		return -EPROBE_DEFER;
-
-	/*
-	 * If we use a tagging format that doesn't have an ethertype
-	 * field, make sure that all packets from this point on get
-	 * sent to the tag format's receive function.
-	 */
-	wmb();
-	dev->dsa_ptr = (void *)dst;
-
-	return 0;
-}
-
-static int dsa_probe(struct platform_device *pdev)
-{
-	struct dsa_platform_data *pd = pdev->dev.platform_data;
-	struct net_device *dev;
-	struct dsa_switch_tree *dst;
-	int ret;
-
-	if (pdev->dev.of_node) {
-		ret = dsa_of_probe(&pdev->dev);
-		if (ret)
-			return ret;
-
-		pd = pdev->dev.platform_data;
-	}
-
-	if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
-		return -EINVAL;
-
-	if (pd->of_netdev) {
-		dev = pd->of_netdev;
-		dev_hold(dev);
-	} else {
-		dev = dsa_dev_to_net_device(pd->netdev);
-	}
-	if (dev == NULL) {
-		ret = -EPROBE_DEFER;
-		goto out;
-	}
-
-	if (dev->dsa_ptr != NULL) {
-		dev_put(dev);
-		ret = -EEXIST;
-		goto out;
-	}
-
-	dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
-	if (dst == NULL) {
-		dev_put(dev);
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	platform_set_drvdata(pdev, dst);
-
-	ret = dsa_setup_dst(dst, dev, &pdev->dev, pd);
-	if (ret) {
-		dev_put(dev);
-		goto out;
-	}
-
-	return 0;
-
-out:
-	dsa_of_remove(&pdev->dev);
-
-	return ret;
-}
-
-static void dsa_remove_dst(struct dsa_switch_tree *dst)
-{
-	int i;
-
-	dst->master_netdev->dsa_ptr = NULL;
-
-	/* If we used a tagging format that doesn't have an ethertype
-	 * field, make sure that all packets from this point get sent
-	 * without the tag and go through the regular receive path.
-	 */
-	wmb();
-
-	for (i = 0; i < dst->pd->nr_chips; i++) {
-		struct dsa_switch *ds = dst->ds[i];
-
-		if (ds)
-			dsa_switch_destroy(ds);
-	}
-
-	dsa_cpu_port_ethtool_restore(dst->cpu_switch);
-
-	dev_put(dst->master_netdev);
-}
-
-static int dsa_remove(struct platform_device *pdev)
-{
-	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
-
-	dsa_remove_dst(dst);
-	dsa_of_remove(&pdev->dev);
-
-	return 0;
-}
-
-static void dsa_shutdown(struct platform_device *pdev)
-{
-}
-
 static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 			  struct packet_type *pt, struct net_device *orig_dev)
 {
@@ -936,59 +225,6 @@ static struct packet_type dsa_pack_type __read_mostly = {
 	.func	= dsa_switch_rcv,
 };
 
-#ifdef CONFIG_PM_SLEEP
-static int dsa_suspend(struct device *d)
-{
-	struct platform_device *pdev = to_platform_device(d);
-	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
-	int i, ret = 0;
-
-	for (i = 0; i < dst->pd->nr_chips; i++) {
-		struct dsa_switch *ds = dst->ds[i];
-
-		if (ds != NULL)
-			ret = dsa_switch_suspend(ds);
-	}
-
-	return ret;
-}
-
-static int dsa_resume(struct device *d)
-{
-	struct platform_device *pdev = to_platform_device(d);
-	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
-	int i, ret = 0;
-
-	for (i = 0; i < dst->pd->nr_chips; i++) {
-		struct dsa_switch *ds = dst->ds[i];
-
-		if (ds != NULL)
-			ret = dsa_switch_resume(ds);
-	}
-
-	return ret;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
-
-static const struct of_device_id dsa_of_match_table[] = {
-	{ .compatible = "marvell,dsa", },
-	{}
-};
-MODULE_DEVICE_TABLE(of, dsa_of_match_table);
-
-static struct platform_driver dsa_driver = {
-	.probe		= dsa_probe,
-	.remove		= dsa_remove,
-	.shutdown	= dsa_shutdown,
-	.driver = {
-		.name	= "dsa",
-		.of_match_table = dsa_of_match_table,
-		.pm	= &dsa_pm_ops,
-	},
-};
-
 static int __init dsa_init_module(void)
 {
 	int rc;
@@ -997,9 +233,11 @@ static int __init dsa_init_module(void)
 	if (rc)
 		return rc;
 
-	rc = platform_driver_register(&dsa_driver);
+#ifdef CONFIG_NET_DSA_LEGACY
+	rc = dsa_legacy_register();
 	if (rc)
 		return rc;
+#endif /* CONFIG_NET_DSA_LEGACY */
 
 	dev_add_pack(&dsa_pack_type);
 
@@ -1011,7 +249,9 @@ static void __exit dsa_cleanup_module(void)
 {
 	dsa_slave_unregister_notifier();
 	dev_remove_pack(&dsa_pack_type);
-	platform_driver_unregister(&dsa_driver);
+#ifdef CONFIG_NET_DSA_LEGACY
+	dsa_legacy_unregister();
+#endif /* CONFIG_NET_DSA_LEGACY */
 }
 module_exit(dsa_cleanup_module);
 
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index 107138a55bd8..44858fabbde6 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -55,6 +55,12 @@ const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol);
 int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds);
 void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds);
 
+/* legacy.c */
+#ifdef CONFIG_NET_DSA_LEGACY
+int dsa_legacy_register(void);
+void dsa_legacy_unregister(void);
+#endif /* CONFIG_NET_DSA_LEGACY */
+
 /* slave.c */
 extern const struct dsa_device_ops notag_netdev_ops;
 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
diff --git a/net/dsa/dsa.c b/net/dsa/legacy.c
similarity index 79%
copy from net/dsa/dsa.c
copy to net/dsa/legacy.c
index 1fb9cf7aaaf4..ad345c8b0b06 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/legacy.c
@@ -1,5 +1,5 @@
 /*
- * net/dsa/dsa.c - Hardware switch handling
+ * net/dsa/legacy.c - Hardware switch handling
  * Copyright (c) 2008-2009 Marvell Semiconductor
  * Copyright (c) 2013 Florian Fainelli <florian@...nwrt.org>
  *
@@ -18,49 +18,13 @@
 #include <linux/of_mdio.h>
 #include <linux/of_platform.h>
 #include <linux/of_net.h>
-#include <linux/of_gpio.h>
 #include <linux/netdevice.h>
 #include <linux/sysfs.h>
 #include <linux/phy_fixed.h>
-#include <linux/gpio/consumer.h>
 #include <linux/etherdevice.h>
 #include <net/dsa.h>
 #include "dsa_priv.h"
 
-static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
-					    struct net_device *dev)
-{
-	/* Just return the original SKB */
-	return skb;
-}
-
-static const struct dsa_device_ops none_ops = {
-	.xmit	= dsa_slave_notag_xmit,
-	.rcv	= NULL,
-};
-
-const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
-#ifdef CONFIG_NET_DSA_TAG_DSA
-	[DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
-#endif
-#ifdef CONFIG_NET_DSA_TAG_EDSA
-	[DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops,
-#endif
-#ifdef CONFIG_NET_DSA_TAG_TRAILER
-	[DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops,
-#endif
-#ifdef CONFIG_NET_DSA_TAG_BRCM
-	[DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
-#endif
-#ifdef CONFIG_NET_DSA_TAG_QCA
-	[DSA_TAG_PROTO_QCA] = &qca_netdev_ops,
-#endif
-#ifdef CONFIG_NET_DSA_TAG_MTK
-	[DSA_TAG_PROTO_MTK] = &mtk_netdev_ops,
-#endif
-	[DSA_TAG_PROTO_NONE] = &none_ops,
-};
-
 /* switch driver registration ***********************************************/
 static DEFINE_MUTEX(dsa_switch_drivers_mutex);
 static LIST_HEAD(dsa_switch_drivers);
@@ -114,37 +78,6 @@ dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
 }
 
 /* basic switch operations **************************************************/
-int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
-		      struct dsa_port *dport, int port)
-{
-	struct device_node *port_dn = dport->dn;
-	struct phy_device *phydev;
-	int ret, mode;
-
-	if (of_phy_is_fixed_link(port_dn)) {
-		ret = of_phy_register_fixed_link(port_dn);
-		if (ret) {
-			dev_err(dev, "failed to register fixed PHY\n");
-			return ret;
-		}
-		phydev = of_phy_find_device(port_dn);
-
-		mode = of_get_phy_mode(port_dn);
-		if (mode < 0)
-			mode = PHY_INTERFACE_MODE_NA;
-		phydev->interface = mode;
-
-		genphy_config_init(phydev);
-		genphy_read_status(phydev);
-		if (ds->ops->adjust_link)
-			ds->ops->adjust_link(ds, port, phydev);
-
-		put_device(&phydev->mdio.dev);
-	}
-
-	return 0;
-}
-
 static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
 {
 	struct dsa_port *dport;
@@ -162,55 +95,6 @@ static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
 	return 0;
 }
 
-const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
-{
-	const struct dsa_device_ops *ops;
-
-	if (tag_protocol >= DSA_TAG_LAST)
-		return ERR_PTR(-EINVAL);
-	ops = dsa_device_ops[tag_protocol];
-
-	if (!ops)
-		return ERR_PTR(-ENOPROTOOPT);
-
-	return ops;
-}
-
-int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
-{
-	struct net_device *master;
-	struct ethtool_ops *cpu_ops;
-
-	master = ds->dst->master_netdev;
-	if (ds->master_netdev)
-		master = ds->master_netdev;
-
-	cpu_ops = devm_kzalloc(ds->dev, sizeof(*cpu_ops), GFP_KERNEL);
-	if (!cpu_ops)
-		return -ENOMEM;
-
-	memcpy(&ds->dst->master_ethtool_ops, master->ethtool_ops,
-	       sizeof(struct ethtool_ops));
-	ds->dst->master_orig_ethtool_ops = master->ethtool_ops;
-	memcpy(cpu_ops, &ds->dst->master_ethtool_ops,
-	       sizeof(struct ethtool_ops));
-	dsa_cpu_port_ethtool_init(cpu_ops);
-	master->ethtool_ops = cpu_ops;
-
-	return 0;
-}
-
-void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
-{
-	struct net_device *master;
-
-	master = ds->dst->master_netdev;
-	if (ds->master_netdev)
-		master = ds->master_netdev;
-
-	master->ethtool_ops = ds->dst->master_orig_ethtool_ops;
-}
-
 static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
 {
 	const struct dsa_switch_ops *ops = ds->ops;
@@ -373,14 +257,6 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 	return ds;
 }
 
-void dsa_cpu_dsa_destroy(struct dsa_port *port)
-{
-	struct device_node *port_dn = port->dn;
-
-	if (of_phy_is_fixed_link(port_dn))
-		of_phy_deregister_fixed_link(port_dn);
-}
-
 static void dsa_switch_destroy(struct dsa_switch *ds)
 {
 	int port;
@@ -497,25 +373,6 @@ struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 
-struct net_device *dsa_dev_to_net_device(struct device *dev)
-{
-	struct device *d;
-
-	d = dev_find_class(dev, "net");
-	if (d != NULL) {
-		struct net_device *nd;
-
-		nd = to_net_dev(d);
-		dev_hold(nd);
-		put_device(d);
-
-		return nd;
-	}
-
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
-
 #ifdef CONFIG_OF
 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 					struct dsa_chip_data *cd,
@@ -897,45 +754,6 @@ static void dsa_shutdown(struct platform_device *pdev)
 {
 }
 
-static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
-			  struct packet_type *pt, struct net_device *orig_dev)
-{
-	struct dsa_switch_tree *dst = dev->dsa_ptr;
-	struct sk_buff *nskb = NULL;
-
-	if (unlikely(dst == NULL)) {
-		kfree_skb(skb);
-		return 0;
-	}
-
-	skb = skb_unshare(skb, GFP_ATOMIC);
-	if (!skb)
-		return 0;
-
-	nskb = dst->rcv(skb, dev, pt, orig_dev);
-	if (!nskb) {
-		kfree_skb(skb);
-		return 0;
-	}
-
-	skb = nskb;
-	skb_push(skb, ETH_HLEN);
-	skb->pkt_type = PACKET_HOST;
-	skb->protocol = eth_type_trans(skb, skb->dev);
-
-	skb->dev->stats.rx_packets++;
-	skb->dev->stats.rx_bytes += skb->len;
-
-	netif_receive_skb(skb);
-
-	return 0;
-}
-
-static struct packet_type dsa_pack_type __read_mostly = {
-	.type	= cpu_to_be16(ETH_P_XDSA),
-	.func	= dsa_switch_rcv,
-};
-
 #ifdef CONFIG_PM_SLEEP
 static int dsa_suspend(struct device *d)
 {
@@ -989,33 +807,12 @@ static struct platform_driver dsa_driver = {
 	},
 };
 
-static int __init dsa_init_module(void)
+int dsa_legacy_register(void)
 {
-	int rc;
-
-	rc = dsa_slave_register_notifier();
-	if (rc)
-		return rc;
-
-	rc = platform_driver_register(&dsa_driver);
-	if (rc)
-		return rc;
-
-	dev_add_pack(&dsa_pack_type);
-
-	return 0;
+	return platform_driver_register(&dsa_driver);
 }
-module_init(dsa_init_module);
 
-static void __exit dsa_cleanup_module(void)
+void dsa_legacy_unregister(void)
 {
-	dsa_slave_unregister_notifier();
-	dev_remove_pack(&dsa_pack_type);
 	platform_driver_unregister(&dsa_driver);
 }
-module_exit(dsa_cleanup_module);
-
-MODULE_AUTHOR("Lennert Buytenhek <buytenh@...tstofly.org>");
-MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:dsa");
-- 
2.12.2

Powered by blists - more mailing lists