1 files changed, 90 insertions, 0 deletions

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 32a1b49e8a8c..b78db3c09608 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -11,6 +11,7 @@
 #ifndef __LINUX_NET_DSA_H
 #define __LINUX_NET_DSA_H
 
+#include <linux/list.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 
@@ -90,6 +91,95 @@ struct dsa_switch_tree {
 	struct dsa_switch	*ds[DSA_MAX_SWITCHES];
 };
 
+struct dsa_switch {
+	/*
+	 * Parent switch tree, and switch index.
+	 */
+	struct dsa_switch_tree	*dst;
+	int			index;
+
+	/*
+	 * Configuration data for this switch.
+	 */
+	struct dsa_chip_data	*pd;
+
+	/*
+	 * The used switch driver.
+	 */
+	struct dsa_switch_driver	*drv;
+
+	/*
+	 * Reference to mii bus to use.
+	 */
+	struct mii_bus		*master_mii_bus;
+
+	/*
+	 * Slave mii_bus and devices for the individual ports.
+	 */
+	u32			dsa_port_mask;
+	u32			phys_port_mask;
+	struct mii_bus		*slave_mii_bus;
+	struct net_device	*ports[DSA_MAX_PORTS];
+};
+
+static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
+{
+	return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
+}
+
+static inline u8 dsa_upstream_port(struct dsa_switch *ds)
+{
+	struct dsa_switch_tree *dst = ds->dst;
+
+	/*
+	 * If this is the root switch (i.e. the switch that connects
+	 * to the CPU), return the cpu port number on this switch.
+	 * Else return the (DSA) port number that connects to the
+	 * switch that is one hop closer to the cpu.
+	 */
+	if (dst->cpu_switch == ds->index)
+		return dst->cpu_port;
+	else
+		return ds->pd->rtable[dst->cpu_switch];
+}
+
+struct dsa_switch_driver {
+	struct list_head	list;
+
+	__be16			tag_protocol;
+	int			priv_size;
+
+	/*
+	 * Probing and setup.
+	 */
+	char	*(*probe)(struct mii_bus *bus, int sw_addr);
+	int	(*setup)(struct dsa_switch *ds);
+	int	(*set_addr)(struct dsa_switch *ds, u8 *addr);
+
+	/*
+	 * Access to the switch's PHY registers.
+	 */
+	int	(*phy_read)(struct dsa_switch *ds, int port, int regnum);
+	int	(*phy_write)(struct dsa_switch *ds, int port,
+			     int regnum, u16 val);
+
+	/*
+	 * Link state polling and IRQ handling.
+	 */
+	void	(*poll_link)(struct dsa_switch *ds);
+
+	/*
+	 * ethtool hardware statistics.
+	 */
+	void	(*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
+	void	(*get_ethtool_stats)(struct dsa_switch *ds,
+				     int port, uint64_t *data);
+	int	(*get_sset_count)(struct dsa_switch *ds);
+};
+
+void register_switch_driver(struct dsa_switch_driver *type);
+void unregister_switch_driver(struct dsa_switch_driver *type);
+
 /*
  * 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