Merge branch 'sf2'

Florian Fainelli says:

====================
dsa: Broadcom Starfighter 2 switch support

This patch series adds support for the Broadcom Starfighter 2 (Roboswitch
successor) using the existing DSA infrastructure. This integrated switch
is heavily used in Set Top Box, Cable gateways and DSL gateways products
from Broadcom, and to a larger extent the new ARM-based Wi-Fi routers although
slightly differently.

Changes in v5 are the introduction of ETH_P_XDSA as suggested by Alexander to
help capture applications see this is a multiplexed DSA approach now.

Changes in v4 are the introducing of an indirection level for DSA switch tag
protocols receive and transmit functions.

I intentionnaly did not address one comment from Alexander who suggested to
move port_names and port_dn in a separate structure since that involves
touching arch/arm/ and arch/blackfin/ code which I am not yet comfortable
doing.

Notable changes in v3 is the preliminary patch that reworks the skb->protocol
override helpers for non-Ethertype switch tags, based on feedback from
Alexander Duyck.

The biggest changes from v1 of this patch series are:

- use the new fixed PHY helpers
- improved the switch driver with more complete features (interrupts,
  (RG)MII configuration, memory arrays power down/up, port disabling/enable
  VLAN separation

Future work will focus on bringing the upstream driver in feature parity with
the current downstream driver, including:

- adding Wake-on-LAN support to the switch
- adding suspend/resume callbacks for S2/S3 Power Management modes
- extending the switch register interface to cover BCM5310X SoCs
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 50 insertions, 37 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 039b23786c22..429801370d0c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1781,24 +1781,13 @@ void dev_net_set(struct net_device *dev, struct net *net)
 #endif
 }
 
-static inline bool netdev_uses_dsa_tags(struct net_device *dev)
+static inline bool netdev_uses_dsa(struct net_device *dev)
 {
-#ifdef CONFIG_NET_DSA_TAG_DSA
+#ifdef CONFIG_NET_DSA
 	if (dev->dsa_ptr != NULL)
-		return dsa_uses_dsa_tags(dev->dsa_ptr);
+		return dsa_uses_tagged_protocol(dev->dsa_ptr);
 #endif
-
-	return 0;
-}
-
-static inline bool netdev_uses_trailer_tags(struct net_device *dev)
-{
-#ifdef CONFIG_NET_DSA_TAG_TRAILER
-	if (dev->dsa_ptr != NULL)
-		return dsa_uses_trailer_tags(dev->dsa_ptr);
-#endif
-
-	return 0;
+	return false;
 }
 
 /**
@@ -1933,6 +1922,13 @@ struct udp_offload {
 	struct offload_callbacks callbacks;
 };
 
+struct dsa_device_ops {
+	netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
+	int (*rcv)(struct sk_buff *skb, struct net_device *dev,
+		   struct packet_type *pt, struct net_device *orig_dev);
+};
+
+
 /* often modified stats are per cpu, other are shared (netdev->stats) */
 struct pcpu_sw_netstats {
 	u64     rx_packets;
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index ae612acebb53..941138664c1d 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -18,6 +18,9 @@ extern int fixed_phy_register(unsigned int irq,
 			      struct fixed_phy_status *status,
 			      struct device_node *np);
 extern void fixed_phy_del(int phy_addr);
+extern int fixed_phy_set_link_update(struct phy_device *phydev,
+			int (*link_update)(struct net_device *,
+					   struct fixed_phy_status *));
 #else
 static inline int fixed_phy_add(unsigned int irq, int phy_id,
 				struct fixed_phy_status *status)
@@ -34,14 +37,12 @@ static inline int fixed_phy_del(int phy_addr)
 {
 	return -ENODEV;
 }
-#endif /* CONFIG_FIXED_PHY */
-
-/*
- * This function issued only by fixed_phy-aware drivers, no need
- * protect it with #ifdef
- */
-extern int fixed_phy_set_link_update(struct phy_device *phydev,
+static inline int fixed_phy_set_link_update(struct phy_device *phydev,
 			int (*link_update)(struct net_device *,
-					   struct fixed_phy_status *));
+					   struct fixed_phy_status *))
+{
+	return -ENODEV;
+}
+#endif /* CONFIG_FIXED_PHY */
 
 #endif /* __PHY_FIXED_H */
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 6efce384451e..97712927a9d2 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -15,6 +15,14 @@
 #include <linux/list.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+
+/* Not an official ethertype value, used only internally for DSA
+ * demultiplexing
+ */
+#define ETH_P_BRCMTAG		(ETH_P_XDSA + 1)
 
 #define DSA_MAX_SWITCHES	4
 #define DSA_MAX_PORTS		12
@@ -26,6 +34,12 @@ struct dsa_chip_data {
 	struct device	*mii_bus;
 	int		sw_addr;
 
+	/* Device tree node pointer for this specific switch chip
+	 * used during switch setup in case additional properties
+	 * and resources needs to be used
+	 */
+	struct device_node *of_node;
+
 	/*
 	 * The names of the switch's ports.  Use "cpu" to
 	 * designate the switch port that the cpu is connected to,
@@ -34,6 +48,7 @@ struct dsa_chip_data {
 	 * or any other string to indicate this is a physical port.
 	 */
 	char		*port_names[DSA_MAX_PORTS];
+	struct device_node *port_dn[DSA_MAX_PORTS];
 
 	/*
 	 * An array (with nr_chips elements) of which element [a]
@@ -59,6 +74,8 @@ struct dsa_platform_data {
 	struct dsa_chip_data	*chip;
 };
 
+struct dsa_device_ops;
+
 struct dsa_switch_tree {
 	/*
 	 * Configuration data for the platform device that owns
@@ -71,6 +88,7 @@ struct dsa_switch_tree {
 	 * protocol to use.
 	 */
 	struct net_device	*master_netdev;
+	const struct dsa_device_ops	*ops;
 	__be16			tag_protocol;
 
 	/*
@@ -119,6 +137,7 @@ struct dsa_switch {
 	 */
 	u32			dsa_port_mask;
 	u32			phys_port_mask;
+	u32			phys_mii_mask;
 	struct mii_bus		*slave_mii_bus;
 	struct net_device	*ports[DSA_MAX_PORTS];
 };
@@ -170,6 +189,14 @@ struct dsa_switch_driver {
 	void	(*poll_link)(struct dsa_switch *ds);
 
 	/*
+	 * Link state adjustment (called from libphy)
+	 */
+	void	(*adjust_link)(struct dsa_switch *ds, int port,
+				struct phy_device *phydev);
+	void	(*fixed_link_update)(struct dsa_switch *ds, int port,
+				struct fixed_phy_status *st);
+
+	/*
 	 * ethtool hardware statistics.
 	 */
 	void	(*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
@@ -186,21 +213,9 @@ static inline void *ds_to_priv(struct dsa_switch *ds)
 	return (void *)(ds + 1);
 }
 
-/*
- * The original DSA tag format and some other tag formats have no
- * ethertype, which means that we need to add a little hack to the
- * networking receive path to make sure that received frames get
- * the right ->protocol assigned to them when one of those tag
- * formats is in use.
- */
-static inline bool dsa_uses_dsa_tags(struct dsa_switch_tree *dst)
-{
-	return !!(dst->tag_protocol == htons(ETH_P_DSA));
-}
-
-static inline bool dsa_uses_trailer_tags(struct dsa_switch_tree *dst)
+static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
 {
-	return !!(dst->tag_protocol == htons(ETH_P_TRAILER));
+	return dst->tag_protocol != 0;
 }
 
 #endif
diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
index 0f8210b8e0bc..aa63ed023c2b 100644
--- a/include/uapi/linux/if_ether.h
+++ b/include/uapi/linux/if_ether.h
@@ -128,6 +128,7 @@
 #define ETH_P_PHONET	0x00F5		/* Nokia Phonet frames          */
 #define ETH_P_IEEE802154 0x00F6		/* IEEE802.15.4 frame		*/
 #define ETH_P_CAIF	0x00F7		/* ST-Ericsson CAIF protocol	*/
+#define ETH_P_XDSA	0x00F8		/* Multiplexed DSA protocol	*/
 
 /*
  *	This is an Ethernet frame header.