WebSVN - shark - Blame - Rev 422 - /shark/trunk/drivers/linuxc26/include/linux/hdlc.h

Rev	Author	Line No.	Line
422	giacomo	1	/*
		2	* Generic HDLC support routines for Linux
		3	*
		4	* Copyright (C) 1999-2003 Krzysztof Halasa <khc@pm.waw.pl>
		5	*
		6	* This program is free software; you can redistribute it and/or modify it
		7	* under the terms of version 2 of the GNU General Public License
		8	* as published by the Free Software Foundation.
		9	*/
		10
		11	#ifndef __HDLC_H
		12	#define __HDLC_H
		13
		14	#define GENERIC_HDLC_VERSION 4 /* For synchronization with sethdlc utility */
		15
		16	#define CLOCK_DEFAULT 0 /* Default setting */
		17	#define CLOCK_EXT 1 /* External TX and RX clock - DTE */
		18	#define CLOCK_INT 2 /* Internal TX and RX clock - DCE */
		19	#define CLOCK_TXINT 3 /* Internal TX and external RX clock */
		20	#define CLOCK_TXFROMRX 4 /* TX clock derived from external RX clock */
		21
		22
		23	#define ENCODING_DEFAULT 0 /* Default setting */
		24	#define ENCODING_NRZ 1
		25	#define ENCODING_NRZI 2
		26	#define ENCODING_FM_MARK 3
		27	#define ENCODING_FM_SPACE 4
		28	#define ENCODING_MANCHESTER 5
		29
		30
		31	#define PARITY_DEFAULT 0 /* Default setting */
		32	#define PARITY_NONE 1 /* No parity */
		33	#define PARITY_CRC16_PR0 2 /* CRC16, initial value 0x0000 */
		34	#define PARITY_CRC16_PR1 3 /* CRC16, initial value 0xFFFF */
		35	#define PARITY_CRC16_PR0_CCITT 4 /* CRC16, initial 0x0000, ITU-T version */
		36	#define PARITY_CRC16_PR1_CCITT 5 /* CRC16, initial 0xFFFF, ITU-T version */
		37	#define PARITY_CRC32_PR0_CCITT 6 /* CRC32, initial value 0x00000000 */
		38	#define PARITY_CRC32_PR1_CCITT 7 /* CRC32, initial value 0xFFFFFFFF */
		39
		40	#define LMI_DEFAULT 0 /* Default setting */
		41	#define LMI_NONE 1 /* No LMI, all PVCs are static */
		42	#define LMI_ANSI 2 /* ANSI Annex D */
		43	#define LMI_CCITT 3 /* ITU-T Annex A */
		44
		45	#define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */
		46	#define HDLC_MAX_MRU (HDLC_MAX_MTU + 10 + 14 + 4) /* for ETH+VLAN over FR */
		47
		48
		49	#ifdef __KERNEL__
		50
		51	#include <linux/skbuff.h>
		52	#include <linux/netdevice.h>
		53	#include <net/syncppp.h>
		54	#include <linux/hdlc/ioctl.h>
		55
		56
		57	typedef struct { /* Used in Cisco and PPP mode */
		58	u8 address;
		59	u8 control;
		60	u16 protocol;
		61	}__attribute__ ((packed)) hdlc_header;
		62
		63
		64
		65	typedef struct {
		66	u32 type; /* code */
		67	u32 par1;
		68	u32 par2;
		69	u16 rel; /* reliability */
		70	u32 time;
		71	}__attribute__ ((packed)) cisco_packet;
		72	#define CISCO_PACKET_LEN 18
		73	#define CISCO_BIG_PACKET_LEN 20
		74
		75
		76
		77	typedef struct pvc_device_struct {
		78	struct hdlc_device_struct *master;
		79	struct net_device *main;
		80	struct net_device ether; / bridged Ethernet interface */
		81	struct pvc_device_struct next; / Sorted in ascending DLCI order */
		82	int dlci;
		83	int open_count;
		84
		85	struct {
		86	unsigned int new: 1;
		87	unsigned int active: 1;
		88	unsigned int exist: 1;
		89	unsigned int deleted: 1;
		90	unsigned int fecn: 1;
		91	unsigned int becn: 1;
		92	}state;
		93	}pvc_device;
		94
		95
		96
		97	typedef struct hdlc_device_struct {
		98	/* To be initialized by hardware driver */
		99	struct net_device netdev; /* master net device - must be first */
		100	struct net_device_stats stats;
		101
		102	/* used by HDLC layer to take control over HDLC device from hw driver*/
		103	int (attach)(struct hdlc_device_struct hdlc,
		104	unsigned short encoding, unsigned short parity);
		105
		106	/* hardware driver must handle this instead of dev->hard_start_xmit */
		107	int (xmit)(struct sk_buff skb, struct net_device *dev);
		108
		109
		110	/* Things below are for HDLC layer internal use only */
		111	struct {
		112	int (open)(struct hdlc_device_struct hdlc);
		113	void (close)(struct hdlc_device_struct hdlc);
		114
		115	/* if open & DCD */
		116	void (start)(struct hdlc_device_struct hdlc);
		117	/* if open & !DCD */
		118	void (stop)(struct hdlc_device_struct hdlc);
		119
		120	void (detach)(struct hdlc_device_struct hdlc);
		121	int (netif_rx)(struct sk_buff skb);
		122	unsigned short (type_trans)(struct sk_buff skb,
		123	struct net_device *dev);
		124	int id; /* IF_PROTO_HDLC/CISCO/FR/etc. */
		125	}proto;
		126
		127	int carrier;
		128	int open;
		129	spinlock_t state_lock;
		130
		131	union {
		132	struct {
		133	fr_proto settings;
		134	pvc_device *first_pvc;
		135	int dce_pvc_count;
		136
		137	struct timer_list timer;
		138	int last_poll;
		139	int reliable;
		140	int dce_changed;
		141	int request;
		142	int fullrep_sent;
		143	u32 last_errors; /* last errors bit list */
		144	u8 n391cnt;
		145	u8 txseq; /* TX sequence number */
		146	u8 rxseq; /* RX sequence number */
		147	}fr;
		148
		149	struct {
		150	cisco_proto settings;
		151
		152	struct timer_list timer;
		153	int last_poll;
		154	int up;
		155	u32 txseq; /* TX sequence number */
		156	u32 rxseq; /* RX sequence number */
		157	}cisco;
		158
		159	struct {
		160	raw_hdlc_proto settings;
		161	}raw_hdlc;
		162
		163	struct {
		164	struct ppp_device pppdev;
		165	struct ppp_device *syncppp_ptr;
		166	int (old_change_mtu)(struct net_device dev,
		167	int new_mtu);
		168	}ppp;
		169	}state;
		170	}hdlc_device;
		171
		172
		173
		174	int hdlc_raw_ioctl(hdlc_device hdlc, struct ifreq ifr);
		175	int hdlc_raw_eth_ioctl(hdlc_device hdlc, struct ifreq ifr);
		176	int hdlc_cisco_ioctl(hdlc_device hdlc, struct ifreq ifr);
		177	int hdlc_ppp_ioctl(hdlc_device hdlc, struct ifreq ifr);
		178	int hdlc_fr_ioctl(hdlc_device hdlc, struct ifreq ifr);
		179	int hdlc_x25_ioctl(hdlc_device hdlc, struct ifreq ifr);
		180
		181
		182	/* Exported from hdlc.o */
		183
		184	/* Called by hardware driver when a user requests HDLC service */
		185	int hdlc_ioctl(struct net_device dev, struct ifreq ifr, int cmd);
		186
		187	/* Must be used by hardware driver on module startup/exit */
		188	int register_hdlc_device(hdlc_device *hdlc);
		189	void unregister_hdlc_device(hdlc_device *hdlc);
		190
		191
		192	static __inline__ struct net_device* hdlc_to_dev(hdlc_device *hdlc)
		193	{
		194	return &hdlc->netdev;
		195	}
		196
		197
		198	static __inline__ hdlc_device* dev_to_hdlc(struct net_device *dev)
		199	{
		200	return (hdlc_device*)dev;
		201	}
		202
		203
		204	static __inline__ pvc_device* dev_to_pvc(struct net_device *dev)
		205	{
		206	return (pvc_device*)dev->priv;
		207	}
		208
		209
		210	static __inline__ const char hdlc_to_name(hdlc_device hdlc)
		211	{
		212	return hdlc_to_dev(hdlc)->name;
		213	}
		214
		215
		216	static __inline__ void debug_frame(const struct sk_buff *skb)
		217	{
		218	int i;
		219
		220	for (i=0; i < skb->len; i++) {
		221	if (i == 100) {
		222	printk("...\n");
		223	return;
		224	}
		225	printk(" %02X", skb->data[i]);
		226	}
		227	printk("\n");
		228	}
		229
		230
		231	/* Must be called by hardware driver when HDLC device is being opened */
		232	int hdlc_open(hdlc_device *hdlc);
		233	/* Must be called by hardware driver when HDLC device is being closed */
		234	void hdlc_close(hdlc_device *hdlc);
		235	/* Called by hardware driver when DCD line level changes */
		236	void hdlc_set_carrier(int on, hdlc_device *hdlc);
		237
		238	/* May be used by hardware driver to gain control over HDLC device */
		239	static __inline__ void hdlc_proto_detach(hdlc_device *hdlc)
		240	{
		241	if (hdlc->proto.detach)
		242	hdlc->proto.detach(hdlc);
		243	hdlc->proto.detach = NULL;
		244	}
		245
		246
		247	static __inline__ unsigned short hdlc_type_trans(struct sk_buff *skb,
		248	struct net_device *dev)
		249	{
		250	hdlc_device *hdlc = dev_to_hdlc(skb->dev);
		251	if (hdlc->proto.type_trans)
		252	return hdlc->proto.type_trans(skb, dev);
		253	else
		254	return __constant_htons(ETH_P_HDLC);
		255	}
		256
		257	#endif /* __KERNEL */
		258	#endif /* __HDLC_H */

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