[deliverable/linux.git] / include / net / dsa.h

/*
 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
 * Copyright (c) 2008-2009 Marvell Semiconductor
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef __LINUX_NET_DSA_H
#define __LINUX_NET_DSA_H

#include <linux/timer.h>
#include <linux/workqueue.h>

#define DSA_MAX_SWITCHES	4
#define DSA_MAX_PORTS		12

struct dsa_chip_data {
	/*
	 * How to access the switch configuration registers.
	 */
	struct device	*mii_bus;
	int		sw_addr;

	/*
	 * The names of the switch's ports.  Use "cpu" to
	 * designate the switch port that the cpu is connected to,
	 * "dsa" to indicate that this port is a DSA link to
	 * another switch, NULL to indicate the port is unused,
	 * or any other string to indicate this is a physical port.
	 */
	char		*port_names[DSA_MAX_PORTS];

	/*
	 * An array (with nr_chips elements) of which element [a]
	 * indicates which port on this switch should be used to
	 * send packets to that are destined for switch a.  Can be
	 * NULL if there is only one switch chip.
	 */
	s8		*rtable;
};

struct dsa_platform_data {
	/*
	 * Reference to a Linux network interface that connects
	 * to the root switch chip of the tree.
	 */
	struct device	*netdev;

	/*
	 * Info structs describing each of the switch chips
	 * connected via this network interface.
	 */
	int		nr_chips;
	struct dsa_chip_data	*chip;
};

struct dsa_switch_tree {
	/*
	 * Configuration data for the platform device that owns
	 * this dsa switch tree instance.
	 */
	struct dsa_platform_data	*pd;

	/*
	 * Reference to network device to use, and which tagging
	 * protocol to use.
	 */
	struct net_device	*master_netdev;
	__be16			tag_protocol;

	/*
	 * The switch and port to which the CPU is attached.
	 */
	s8			cpu_switch;
	s8			cpu_port;

	/*
	 * Link state polling.
	 */
	int			link_poll_needed;
	struct work_struct	link_poll_work;
	struct timer_list	link_poll_timer;

	/*
	 * Data for the individual switch chips.
	 */
	struct dsa_switch	*ds[DSA_MAX_SWITCHES];
};

/*
 * 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)
{
	return !!(dst->tag_protocol == htons(ETH_P_TRAILER));
}

#endif
Commit	Line	Data
91da11f8 LB	1	/*
91da11f8 LB	2	* include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
e84665c9	3	* Copyright (c) 2008-2009 Marvell Semiconductor
91da11f8 LB	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#ifndef __LINUX_NET_DSA_H
	12	#define __LINUX_NET_DSA_H
	13
cf50dcc2 BH	14	#include <linux/timer.h>
	15	#include <linux/workqueue.h>
	16
e84665c9 LB	17	#define DSA_MAX_SWITCHES 4
	18	#define DSA_MAX_PORTS 12
	19
	20	struct dsa_chip_data {
	21	/*
	22	* How to access the switch configuration registers.
	23	*/
	24	struct device *mii_bus;
	25	int sw_addr;
	26
	27	/*
	28	* The names of the switch's ports. Use "cpu" to
	29	* designate the switch port that the cpu is connected to,
	30	* "dsa" to indicate that this port is a DSA link to
	31	* another switch, NULL to indicate the port is unused,
	32	* or any other string to indicate this is a physical port.
	33	*/
	34	char *port_names[DSA_MAX_PORTS];
	35
	36	/*
	37	* An array (with nr_chips elements) of which element [a]
	38	* indicates which port on this switch should be used to
	39	* send packets to that are destined for switch a. Can be
	40	* NULL if there is only one switch chip.
	41	*/
	42	s8 *rtable;
	43	};
91da11f8 LB	44
	45	struct dsa_platform_data {
	46	/*
	47	* Reference to a Linux network interface that connects
e84665c9	48	* to the root switch chip of the tree.
91da11f8 LB	49	*/
	50	struct device *netdev;
	51
	52	/*
e84665c9 LB	53	* Info structs describing each of the switch chips
e84665c9 LB	54	* connected via this network interface.
91da11f8	55	*/
e84665c9 LB	56	int nr_chips;
e84665c9 LB	57	struct dsa_chip_data *chip;
91da11f8 LB	58	};
91da11f8 LB	59
cf50dcc2 BH	60	struct dsa_switch_tree {
	61	/*
	62	* Configuration data for the platform device that owns
	63	* this dsa switch tree instance.
	64	*/
	65	struct dsa_platform_data *pd;
	66
	67	/*
	68	* Reference to network device to use, and which tagging
	69	* protocol to use.
	70	*/
	71	struct net_device *master_netdev;
	72	__be16 tag_protocol;
	73
	74	/*
	75	* The switch and port to which the CPU is attached.
	76	*/
	77	s8 cpu_switch;
	78	s8 cpu_port;
	79
	80	/*
	81	* Link state polling.
	82	*/
	83	int link_poll_needed;
	84	struct work_struct link_poll_work;
	85	struct timer_list link_poll_timer;
	86
	87	/*
	88	* Data for the individual switch chips.
	89	*/
	90	struct dsa_switch *ds[DSA_MAX_SWITCHES];
	91	};
	92
	93	/*
	94	* The original DSA tag format and some other tag formats have no
	95	* ethertype, which means that we need to add a little hack to the
	96	* networking receive path to make sure that received frames get
	97	* the right ->protocol assigned to them when one of those tag
	98	* formats is in use.
	99	*/
	100	static inline bool dsa_uses_dsa_tags(struct dsa_switch_tree *dst)
	101	{
	102	return !!(dst->tag_protocol == htons(ETH_P_DSA));
	103	}
cf85d08f	104
cf50dcc2 BH	105	static inline bool dsa_uses_trailer_tags(struct dsa_switch_tree *dst)
	106	{
	107	return !!(dst->tag_protocol == htons(ETH_P_TRAILER));
	108	}
91da11f8 LB	109
91da11f8 LB	110	#endif