swconfig: revert the portmapping patches, they seem to cause a segfault

Revert "kernel/swconfig: remove obsolete portmapping feature from swconfig"

This reverts commit 675407baa44a8700de20b6b2857009a552a807ba.

Revert "swconfig: remove obsolete portmapping feature"

This reverts commit fca1eb349ef31b133a62880cbd562d6bf17500aa.

Signed-off-by: John Crispin <john@phrozen.org>

8 files changed, 228 insertions, 1 deletions

diff --git a/package/network/config/swconfig/src/cli.c b/package/network/config/swconfig/src/cli.c
index 28b7ed8625..eab6c64742 100644
--- a/package/network/config/swconfig/src/cli.c
+++ b/package/network/config/swconfig/src/cli.c
@@ -41,6 +41,7 @@ enum {
 	CMD_LOAD,
 	CMD_HELP,
 	CMD_SHOW,
+	CMD_PORTMAP,
 };
 
 static void
@@ -284,6 +285,10 @@ int main(int argc, char **argv)
 				print_usage();
 			cmd = CMD_LOAD;
 			ckey = argv[++i];
+		} else if (!strcmp(arg, "portmap")) {
+			if (i + 1 < argc)
+				csegment = argv[++i];
+			cmd = CMD_PORTMAP;
 		} else if (!strcmp(arg, "show")) {
 			cmd = CMD_SHOW;
 		} else {
@@ -357,6 +362,9 @@ int main(int argc, char **argv)
 	case CMD_HELP:
 		list_attributes(dev);
 		break;
+	case CMD_PORTMAP:
+		swlib_print_portmap(dev, csegment);
+		break;
 	case CMD_SHOW:
 		if (cport >= 0 || cvlan >= 0) {
 			if (cport >= 0)
diff --git a/package/network/config/swconfig/src/swlib.c b/package/network/config/swconfig/src/swlib.c
index 440a45aef7..e6e9aead47 100644
--- a/package/network/config/swconfig/src/swlib.c
+++ b/package/network/config/swconfig/src/swlib.c
@@ -46,6 +46,11 @@ static struct nla_policy port_policy[SWITCH_ATTR_MAX] = {
 	[SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG },
 };
 
+static struct nla_policy portmap_policy[SWITCH_PORTMAP_MAX] = {
+	[SWITCH_PORTMAP_SEGMENT] = { .type = NLA_STRING },
+	[SWITCH_PORTMAP_VIRT] = { .type = NLA_U32 },
+};
+
 static struct nla_policy link_policy[SWITCH_LINK_ATTR_MAX] = {
 	[SWITCH_LINK_FLAG_LINK] = { .type = NLA_FLAG },
 	[SWITCH_LINK_FLAG_DUPLEX] = { .type = NLA_FLAG },
@@ -697,6 +702,41 @@ struct swlib_scan_arg {
 };
 
 static int
+add_port_map(struct switch_dev *dev, struct nlattr *nla)
+{
+	struct nlattr *p;
+	int err = 0, idx = 0;
+	int remaining;
+
+	dev->maps = malloc(sizeof(struct switch_portmap) * dev->ports);
+	if (!dev->maps)
+		return -1;
+	memset(dev->maps, 0, sizeof(struct switch_portmap) * dev->ports);
+
+	nla_for_each_nested(p, nla, remaining) {
+		struct nlattr *tb[SWITCH_PORTMAP_MAX+1];
+
+		if (idx >= dev->ports)
+			continue;
+
+		err = nla_parse_nested(tb, SWITCH_PORTMAP_MAX, p, portmap_policy);
+		if (err < 0)
+			continue;
+
+
+		if (tb[SWITCH_PORTMAP_SEGMENT] && tb[SWITCH_PORTMAP_VIRT]) {
+			dev->maps[idx].segment = strdup(nla_get_string(tb[SWITCH_PORTMAP_SEGMENT]));
+			dev->maps[idx].virt = nla_get_u32(tb[SWITCH_PORTMAP_VIRT]);
+		}
+		idx++;
+	}
+
+out:
+	return err;
+}
+
+
+static int
 add_switch(struct nl_msg *msg, void *arg)
 {
 	struct swlib_scan_arg *sa = arg;
@@ -733,6 +773,8 @@ add_switch(struct nl_msg *msg, void *arg)
 		dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]);
 	if (tb[SWITCH_ATTR_CPU_PORT])
 		dev->cpu_port = nla_get_u32(tb[SWITCH_ATTR_CPU_PORT]);
+	if (tb[SWITCH_ATTR_PORTMAP])
+		add_port_map(dev, tb[SWITCH_ATTR_PORTMAP]);
 
 	if (!sa->head) {
 		sa->head = dev;
@@ -774,6 +816,34 @@ swlib_list(void)
 	swlib_priv_free();
 }
 
+void
+swlib_print_portmap(struct switch_dev *dev, char *segment)
+{
+	int i;
+
+	if (segment) {
+		if (!strcmp(segment, "cpu")) {
+			printf("%d ", dev->cpu_port);
+		} else if (!strcmp(segment, "disabled")) {
+			for (i = 0; i < dev->ports; i++)
+				if (!dev->maps[i].segment)
+					printf("%d ", i);
+		} else for (i = 0; i < dev->ports; i++) {
+			if (dev->maps[i].segment && !strcmp(dev->maps[i].segment, segment))
+				printf("%d ", i);
+		}
+	} else {
+		printf("%s - %s\n", dev->dev_name, dev->name);
+		for (i = 0; i < dev->ports; i++)
+			if (i == dev->cpu_port)
+				printf("port%d:\tcpu\n", i);
+			else if (dev->maps[i].segment)
+				printf("port%d:\t%s.%d\n", i, dev->maps[i].segment, dev->maps[i].virt);
+			else
+				printf("port%d:\tdisabled\n", i);
+	}
+}
+
 struct switch_dev *
 swlib_connect(const char *name)
 {
@@ -811,12 +881,26 @@ swlib_free_attributes(struct switch_attr **head)
 	*head = NULL;
 }
 
+static void
+swlib_free_port_map(struct switch_dev *dev)
+{
+	int i;
+
+	if (!dev || !dev->maps)
+		return;
+
+	for (i = 0; i < dev->ports; i++)
+		free(dev->maps[i].segment);
+	free(dev->maps);
+}
+
 void
 swlib_free(struct switch_dev *dev)
 {
 	swlib_free_attributes(&dev->ops);
 	swlib_free_attributes(&dev->port_ops);
 	swlib_free_attributes(&dev->vlan_ops);
+	swlib_free_port_map(dev);
 	free(dev->name);
 	free(dev->alias);
 	free(dev);
diff --git a/package/network/config/swconfig/src/swlib.h b/package/network/config/swconfig/src/swlib.h
index 89dbba748d..3826a5e340 100644
--- a/package/network/config/swconfig/src/swlib.h
+++ b/package/network/config/swconfig/src/swlib.h
@@ -129,6 +129,7 @@ struct switch_dev {
 	struct switch_attr *ops;
 	struct switch_attr *port_ops;
 	struct switch_attr *vlan_ops;
+	struct switch_portmap *maps;
 	struct switch_dev *next;
 	void *priv;
 };
@@ -161,6 +162,11 @@ struct switch_port {
 	unsigned int flags;
 };
 
+struct switch_portmap {
+	unsigned int virt;
+	char *segment;
+};
+
 struct switch_port_link {
 	int link:1;
 	int duplex:1;
@@ -178,6 +184,12 @@ struct switch_port_link {
 void swlib_list(void);
 
 /**
+ * swlib_print_portmap: get portmap
+ * @dev: switch device struct
+ */
+void swlib_print_portmap(struct switch_dev *dev, char *segment);
+
+/**
  * swlib_connect: connect to the switch through netlink
  * @name: name of the ethernet interface,
  *
diff --git a/target/linux/generic/files/drivers/net/phy/swconfig.c b/target/linux/generic/files/drivers/net/phy/swconfig.c
index 8dfcb1aa3b..c70ca74cad 100644
--- a/target/linux/generic/files/drivers/net/phy/swconfig.c
+++ b/target/linux/generic/files/drivers/net/phy/swconfig.c
@@ -915,7 +915,9 @@ static int
 swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 		const struct switch_dev *dev)
 {
+	struct nlattr *p = NULL, *m = NULL;
 	void *hdr;
+	int i;
 
 	hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags,
 			SWITCH_CMD_NEW_ATTR);
@@ -937,6 +939,24 @@ swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 	if (nla_put_u32(msg, SWITCH_ATTR_CPU_PORT, dev->cpu_port))
 		goto nla_put_failure;
 
+	m = nla_nest_start(msg, SWITCH_ATTR_PORTMAP);
+	if (!m)
+		goto nla_put_failure;
+	for (i = 0; i < dev->ports; i++) {
+		p = nla_nest_start(msg, SWITCH_ATTR_PORTS);
+		if (!p)
+			continue;
+		if (dev->portmap[i].s) {
+			if (nla_put_string(msg, SWITCH_PORTMAP_SEGMENT,
+						dev->portmap[i].s))
+				goto nla_put_failure;
+			if (nla_put_u32(msg, SWITCH_PORTMAP_VIRT,
+						dev->portmap[i].virt))
+				goto nla_put_failure;
+		}
+		nla_nest_end(msg, p);
+	}
+	nla_nest_end(msg, m);
 	genlmsg_end(msg, hdr);
 	return msg->len;
 nla_put_failure:
@@ -1029,6 +1049,51 @@ static struct genl_ops swconfig_ops[] = {
 	}
 };
 
+#ifdef CONFIG_OF
+void
+of_switch_load_portmap(struct switch_dev *dev)
+{
+	struct device_node *port;
+
+	if (!dev->of_node)
+		return;
+
+	for_each_child_of_node(dev->of_node, port) {
+		const __be32 *prop;
+		const char *segment;
+		int size, phys;
+
+		if (!of_device_is_compatible(port, "swconfig,port"))
+			continue;
+
+		if (of_property_read_string(port, "swconfig,segment", &segment))
+			continue;
+
+		prop = of_get_property(port, "swconfig,portmap", &size);
+		if (!prop)
+			continue;
+
+		if (size != (2 * sizeof(*prop))) {
+			pr_err("%s: failed to parse port mapping\n",
+					port->name);
+			continue;
+		}
+
+		phys = be32_to_cpup(prop++);
+		if ((phys < 0) | (phys >= dev->ports)) {
+			pr_err("%s: physical port index out of range\n",
+					port->name);
+			continue;
+		}
+
+		dev->portmap[phys].s = kstrdup(segment, GFP_KERNEL);
+		dev->portmap[phys].virt = be32_to_cpup(prop);
+		pr_debug("Found port: %s, physical: %d, virtual: %d\n",
+			segment, phys, dev->portmap[phys].virt);
+	}
+}
+#endif
+
 int
 register_switch(struct switch_dev *dev, struct net_device *netdev)
 {
@@ -1051,6 +1116,12 @@ register_switch(struct switch_dev *dev, struct net_device *netdev)
 				dev->ports, GFP_KERNEL);
 		if (!dev->portbuf)
 			return -ENOMEM;
+		dev->portmap = kzalloc(sizeof(struct switch_portmap) *
+				dev->ports, GFP_KERNEL);
+		if (!dev->portmap) {
+			kfree(dev->portbuf);
+			return -ENOMEM;
+		}
 	}
 	swconfig_defaults_init(dev);
 	mutex_init(&dev->sw_mutex);
@@ -1072,6 +1143,11 @@ register_switch(struct switch_dev *dev, struct net_device *netdev)
 		return -ENFILE;
 	}
 
+#ifdef CONFIG_OF
+	if (dev->ports)
+		of_switch_load_portmap(dev);
+#endif
+
 	/* fill device name */
 	snprintf(dev->devname, IFNAMSIZ, SWCONFIG_DEVNAME, i);
 
diff --git a/target/linux/generic/files/include/linux/switch.h b/target/linux/generic/files/include/linux/switch.h
index a381fd006c..dda4820a7a 100644
--- a/target/linux/generic/files/include/linux/switch.h
+++ b/target/linux/generic/files/include/linux/switch.h
@@ -105,6 +105,7 @@ struct switch_dev_ops {
 };
 
 struct switch_dev {
+	struct device_node *of_node;
 	const struct switch_dev_ops *ops;
 	/* will be automatically filled */
 	char devname[IFNAMSIZ];
@@ -125,6 +126,7 @@ struct switch_dev {
 
 	struct mutex sw_mutex;
 	struct switch_port *portbuf;
+	struct switch_portmap *portmap;
 	struct switch_port_link linkbuf;
 
 	char buf[128];
@@ -139,6 +141,11 @@ struct switch_port {
 	u32 flags;
 };
 
+struct switch_portmap {
+	u32 virt;
+	const char *s;
+};
+
 struct switch_val {
 	const struct switch_attr *attr;
 	int port_vlan;
diff --git a/target/linux/generic/files/include/uapi/linux/switch.h b/target/linux/generic/files/include/uapi/linux/switch.h
index 2a67da2e9d..ea449653fa 100644
--- a/target/linux/generic/files/include/uapi/linux/switch.h
+++ b/target/linux/generic/files/include/uapi/linux/switch.h
@@ -39,6 +39,7 @@ enum {
 	SWITCH_ATTR_NAME,
 	SWITCH_ATTR_VLANS,
 	SWITCH_ATTR_PORTS,
+	SWITCH_ATTR_PORTMAP,
 	SWITCH_ATTR_CPU_PORT,
 	/* attributes */
 	SWITCH_ATTR_OP_ID,
@@ -56,6 +57,14 @@ enum {
 	SWITCH_ATTR_MAX
 };
 
+enum {
+	/* port map */
+	SWITCH_PORTMAP_PORTS,
+	SWITCH_PORTMAP_SEGMENT,
+	SWITCH_PORTMAP_VIRT,
+	SWITCH_PORTMAP_MAX
+};
+
 /* commands */
 enum {
 	SWITCH_CMD_UNSPEC,
diff --git a/target/linux/ramips/dts/FONERA20N.dts b/target/linux/ramips/dts/FONERA20N.dts
index 004a2c0889..b7eb91ea7b 100644
--- a/target/linux/ramips/dts/FONERA20N.dts
+++ b/target/linux/ramips/dts/FONERA20N.dts
@@ -93,6 +93,36 @@
 
 &esw {
 	mediatek,portmap = <0x2f>;
+
+	port@0 {
+		compatible = "swconfig,port";
+		swconfig,segment = "lan";
+		swconfig,portmap = <0 4>;
+	};
+
+	port@1 {
+		compatible = "swconfig,port";
+		swconfig,segment = "lan";
+		swconfig,portmap = <1 3>;
+	};
+
+	port@2 {
+		compatible = "swconfig,port";
+		swconfig,segment = "lan";
+		swconfig,portmap = <2 2>;
+	};
+
+	port@3 {
+		compatible = "swconfig,port";
+		swconfig,segment = "lan";
+		swconfig,portmap = <3 1>;
+	};
+
+	port@4 {
+		compatible = "swconfig,port";
+		swconfig,segment = "wan";
+		swconfig,portmap = <4 0>;
+	};
 };
 
 &wmac {
diff --git a/target/linux/ramips/patches-4.4/0512-net-mediatek-add-swconfig-driver-for-esw_rt3050.patch b/target/linux/ramips/patches-4.4/0512-net-mediatek-add-swconfig-driver-for-esw_rt3050.patch
index b647d889f9..5d0072fe1e 100644
--- a/target/linux/ramips/patches-4.4/0512-net-mediatek-add-swconfig-driver-for-esw_rt3050.patch
+++ b/target/linux/ramips/patches-4.4/0512-net-mediatek-add-swconfig-driver-for-esw_rt3050.patch
@@ -865,11 +865,12 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  	struct rt305x_esw *esw;
  	struct resource *irq;
  	int ret;
-@@ -568,6 +1353,20 @@ static int esw_probe(struct platform_dev
+@@ -568,6 +1353,21 @@ static int esw_probe(struct platform_dev
  	if (reg_init)
  		esw->reg_led_polarity = be32_to_cpu(*reg_init);
  
 +	swdev = &esw->swdev;
++	swdev->of_node = pdev->dev.of_node;
 +	swdev->name = "rt305x-esw";
 +	swdev->alias = "rt305x";
 +	swdev->cpu_port = RT305X_ESW_PORT6;