diff options
Diffstat (limited to 'include/linux/hdlc.h')
| -rw-r--r-- | include/linux/hdlc.h | 339 |
1 files changed, 196 insertions, 143 deletions
diff --git a/include/linux/hdlc.h b/include/linux/hdlc.h index 3ac12961d802..eea06e00db22 100644 --- a/include/linux/hdlc.h +++ b/include/linux/hdlc.h @@ -1,7 +1,7 @@ /* * Generic HDLC support routines for Linux * - * Copyright (C) 1999, 2000 Krzysztof Halasa <khc@pm.waw.pl> + * Copyright (C) 1999-2002 Krzysztof Halasa <khc@pm.waw.pl> * * 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 @@ -12,51 +12,78 @@ #ifndef __HDLC_H #define __HDLC_H -/* Ioctls - to be changed */ -#define HDLCGSLOTMAP (0x89F4) /* E1/T1 slot bitmap */ -#define HDLCGCLOCK (0x89F5) /* clock sources */ -#define HDLCGCLOCKRATE (0x89F6) /* clock rate */ -#define HDLCGMODE (0x89F7) /* internal to hdlc.c - protocol used */ -#define HDLCGLINE (0x89F8) /* physical interface */ -#define HDLCSSLOTMAP (0x89F9) -#define HDLCSCLOCK (0x89FA) -#define HDLCSCLOCKRATE (0x89FB) -#define HDLCSMODE (0x89FC) /* internal to hdlc.c - select protocol */ -#define HDLCPVC (0x89FD) /* internal to hdlc.c - create/delete PVC */ -#define HDLCSLINE (0x89FE) -#define HDLCRUN (0x89FF) /* Download firmware and run board */ - -/* Modes */ -#define MODE_NONE 0x00000000 /* Not initialized */ -#define MODE_DCE 0x00000080 /* DCE */ -#define MODE_HDLC 0x00000100 /* Raw HDLC frames */ -#define MODE_CISCO 0x00000200 -#define MODE_PPP 0x00000400 -#define MODE_FR 0x00000800 /* Any LMI */ -#define MODE_FR_ANSI 0x00000801 -#define MODE_FR_CCITT 0x00000802 -#define MODE_X25 0x00001000 -#define MODE_MASK 0x0000FF00 -#define MODE_SOFT 0x80000000 /* Driver modes, using hardware HDLC */ - -/* Lines */ -#define LINE_DEFAULT 0x00000000 -#define LINE_V35 0x00000001 -#define LINE_RS232 0x00000002 -#define LINE_X21 0x00000003 -#define LINE_T1 0x00000004 -#define LINE_E1 0x00000005 -#define LINE_MASK 0x000000FF -#define LINE_LOOPBACK 0x80000000 /* On-card loopback */ - -#define CLOCK_EXT 0 /* External TX and RX clock - DTE */ -#define CLOCK_INT 1 /* Internal TX and RX clock - DCE */ -#define CLOCK_TXINT 2 /* Internal TX and external RX clock */ -#define CLOCK_TXFROMRX 3 /* TX clock derived from external RX clock */ +#define CLOCK_DEFAULT 0 /* Default (current) setting */ +#define CLOCK_EXT 1 /* External TX and RX clock - DTE */ +#define CLOCK_INT 2 /* Internal TX and RX clock - DCE */ +#define CLOCK_TXINT 3 /* Internal TX and external RX clock */ +#define CLOCK_TXFROMRX 4 /* TX clock derived from external RX clock */ +typedef struct { + unsigned int clock_rate; /* bits per second */ + unsigned int clock_type; /* internal, external, TX-internal etc. */ + unsigned short loopback; +}sync_serial_settings; /* V.35, V.24, X.21 */ + +typedef struct { + unsigned int clock_rate; /* bits per second */ + unsigned int clock_type; /* internal, external, TX-internal etc. */ + unsigned short loopback; + unsigned int slot_map; +}te1_settings; /* T1, E1 */ + + + +#define ENCODING_DEFAULT 0 /* Default (current) setting */ +#define ENCODING_NRZ 1 +#define ENCODING_NRZI 2 +#define ENCODING_FM_MARK 3 +#define ENCODING_FM_SPACE 4 +#define ENCODING_MANCHESTER 5 + + +#define PARITY_DEFAULT 0 /* Default (current) setting */ +#define PARITY_NONE 1 /* No parity */ +#define PARITY_CRC16_PR0 2 /* CRC16, initial value 0x0000 */ +#define PARITY_CRC16_PR1 3 /* CRC16, initial value 0xFFFF */ +#define PARITY_CRC16_PR0_CCITT 4 /* CRC16, initial 0x0000, ITU-T version */ +#define PARITY_CRC16_PR1_CCITT 5 /* CRC16, initial 0xFFFF, ITU-T version */ +#define PARITY_CRC32_PR0_CCITT 6 /* CRC32, initial value 0x00000000 */ +#define PARITY_CRC32_PR1_CCITT 7 /* CRC32, initial value 0xFFFFFFFF */ + +typedef struct { + unsigned short encoding; + unsigned short parity; +}hdlc_proto; + + +#define LMI_DEFAULT 0 /* Default (current) setting */ +#define LMI_NONE 1 /* No LMI, all PVCs are static */ +#define LMI_ANSI 2 /* ANSI Annex D */ +#define LMI_CCITT 3 /* ITU-T Annex A */ + +typedef struct { + unsigned int t391; + unsigned int t392; + unsigned int n391; + unsigned int n392; + unsigned int n393; + unsigned short lmi; + unsigned short dce; /* 1 for DCE (network side) operation */ +}fr_proto; + +typedef struct { + unsigned int dlci; +}fr_proto_pvc; /* for creating/deleting FR PVCs */ + + +typedef struct { + unsigned int interval; + unsigned int timeout; +}cisco_proto; + + +/* PPP doesn't need any info now - supply length = 0 to ioctl */ -#define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */ -#define HDLC_MAX_MRU (HDLC_MAX_MTU + 10) /* max 10 bytes for FR */ #ifdef __KERNEL__ @@ -64,12 +91,10 @@ #include <linux/netdevice.h> #include <net/syncppp.h> -#define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */ +#define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */ +#define HDLC_MAX_MRU (HDLC_MAX_MTU + 10) /* max 10 bytes for FR */ -#define LINK_STATE_RELIABLE 0x01 -#define LINK_STATE_REQUEST 0x02 /* full stat sent (DCE) / req pending (DTE) */ -#define LINK_STATE_CHANGED 0x04 /* change in PVCs state, send full report */ -#define LINK_STATE_FULLREP_SENT 0x08 /* full report sent */ +#define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */ #define PVC_STATE_NEW 0x01 #define PVC_STATE_ACTIVE 0x02 @@ -112,6 +137,7 @@ typedef struct { +#if defined(__LITTLE_ENDIAN_BITFIELD) unsigned ea1 : 1; unsigned cr : 1; unsigned dlcih: 6; @@ -121,6 +147,19 @@ typedef struct { unsigned becn : 1; unsigned fecn : 1; unsigned dlcil: 4; +#elif defined (__BIG_ENDIAN_BITFIELD) + unsigned dlcih: 6; + unsigned cr : 1; + unsigned ea1 : 1; + + unsigned dlcil: 4; + unsigned fecn : 1; + unsigned becn : 1; + unsigned de : 1; + unsigned ea2 : 1; +#else +#error "Please fix <asm/byteorder.h>" +#endif }__attribute__ ((packed)) fr_hdr; @@ -151,63 +190,96 @@ typedef struct pvc_device_struct { struct hdlc_device_struct *master; struct pvc_device_struct *next; - u8 state; - u8 newstate; + struct { + int active; + int new; + int deleted; + int fecn; + int becn; + }state; }pvc_device; -typedef struct { - u32 last_errors; /* last errors bit list */ - int last_poll; /* ! */ - u8 T391; /* ! link integrity verification polling timer */ - u8 T392; /* ! polling verification timer */ - u8 N391; /* full status polling counter */ - u8 N392; /* error threshold */ - u8 N393; /* monitored events count */ - u8 N391cnt; - - u8 state; /* ! */ - u32 txseq; /* ! TX sequence number - Cisco uses 4 bytes */ - u32 rxseq; /* ! RX sequence number */ -}fr_lmi; /* ! means used in Cisco HDLC as well */ - - typedef struct hdlc_device_struct { - /* to be initialized by hardware driver: */ + /* To be initialized by hardware driver */ struct net_device netdev; /* master net device - must be first */ struct net_device_stats stats; - struct ppp_device pppdev; - struct ppp_device *syncppp_ptr; + /* used by HDLC layer to take control over HDLC device from hw driver*/ + int (*attach)(struct hdlc_device_struct *hdlc, + unsigned short encoding, unsigned short parity); + + /* hardware driver must handle this instead of dev->hard_start_xmit */ + int (*xmit)(struct sk_buff *skb, struct net_device *dev); + - /* set_mode may be NULL if HDLC-only board */ - int (*set_mode)(struct hdlc_device_struct *hdlc, int mode); + /* Things below are for HDLC layer internal use only */ + int (*ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); int (*open)(struct hdlc_device_struct *hdlc); - void (*close)(struct hdlc_device_struct *hdlc); - int (*xmit)(struct hdlc_device_struct *hdlc, struct sk_buff *skb); - int (*ioctl)(struct hdlc_device_struct *hdlc, struct ifreq *ifr, - int cmd); - - /* Only in "hardware" FR modes etc. - may be NULL */ - int (*create_pvc)(pvc_device *pvc); - void (*destroy_pvc)(pvc_device *pvc); - int (*open_pvc)(pvc_device *pvc); - void (*close_pvc)(pvc_device *pvc); - - /* for hdlc.c internal use only */ - pvc_device *first_pvc; - u16 pvc_count; - int mode; - - struct timer_list timer; - fr_lmi lmi; + void (*stop)(struct hdlc_device_struct *hdlc); + void (*detach)(struct hdlc_device_struct *hdlc); + void (*netif_rx)(struct sk_buff *skb); + int proto; /* IF_PROTO_HDLC/CISCO/FR/etc. */ + + union { + struct { + fr_proto settings; + pvc_device *first_pvc; + int pvc_count; + + struct timer_list timer; + int last_poll; + int reliable; + int changed; + int request; + int fullrep_sent; + u32 last_errors; /* last errors bit list */ + u8 n391cnt; + u8 txseq; /* TX sequence number */ + u8 rxseq; /* RX sequence number */ + }fr; + + struct { + cisco_proto settings; + + struct timer_list timer; + int last_poll; + int up; + u32 txseq; /* TX sequence number */ + u32 rxseq; /* RX sequence number */ + }cisco; + + struct { + hdlc_proto settings; + }hdlc; + + struct { + struct ppp_device pppdev; + struct ppp_device *syncppp_ptr; + int (*old_change_mtu)(struct net_device *dev, + int new_mtu); + }ppp; + }state; }hdlc_device; + +int hdlc_raw_ioctl(hdlc_device *hdlc, struct ifreq *ifr); +int hdlc_cisco_ioctl(hdlc_device *hdlc, struct ifreq *ifr); +int hdlc_ppp_ioctl(hdlc_device *hdlc, struct ifreq *ifr); +int hdlc_fr_ioctl(hdlc_device *hdlc, struct ifreq *ifr); +int hdlc_x25_ioctl(hdlc_device *hdlc, struct ifreq *ifr); + + +/* Exported from hdlc.o */ + +/* Called by hardware driver when a user requests HDLC service */ +int hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); + +/* Must be used by hardware driver on module startup/exit */ int register_hdlc_device(hdlc_device *hdlc); void unregister_hdlc_device(hdlc_device *hdlc); -void hdlc_netif_rx(hdlc_device *hdlc, struct sk_buff *skb); static __inline__ struct net_device* hdlc_to_dev(hdlc_device *hdlc) @@ -246,33 +318,6 @@ static __inline__ const char *pvc_to_name(pvc_device *pvc) } -static __inline__ u16 status_to_dlci(hdlc_device *hdlc, u8 *status, u8 *state) -{ - *state &= ~(PVC_STATE_ACTIVE | PVC_STATE_NEW); - if (status[2] & 0x08) - *state |= PVC_STATE_NEW; - else if (status[2] & 0x02) - *state |= PVC_STATE_ACTIVE; - - return ((status[0] & 0x3F)<<4) | ((status[1] & 0x78)>>3); -} - - -static __inline__ void dlci_to_status(hdlc_device *hdlc, u16 dlci, u8 *status, - u8 state) -{ - status[0] = (dlci>>4) & 0x3F; - status[1] = ((dlci<<3) & 0x78) | 0x80; - status[2] = 0x80; - - if (state & PVC_STATE_NEW) - status[2] |= 0x08; - else if (state & PVC_STATE_ACTIVE) - status[2] |= 0x02; -} - - - static __inline__ u16 netdev_dlci(struct net_device *dev) { return ntohs(*(u16*)dev->dev_addr); @@ -282,37 +327,15 @@ static __inline__ u16 netdev_dlci(struct net_device *dev) static __inline__ u16 q922_to_dlci(u8 *hdr) { - return ((hdr[0] & 0xFC)<<2) | ((hdr[1] & 0xF0)>>4); + return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4); } static __inline__ void dlci_to_q922(u8 *hdr, u16 dlci) { - hdr[0] = (dlci>>2) & 0xFC; - hdr[1] = ((dlci<<4) & 0xF0) | 0x01; -} - - - -static __inline__ int mode_is(hdlc_device *hdlc, int mask) -{ - return (hdlc->mode & mask) == mask; -} - - - -static __inline__ pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci) -{ - pvc_device *pvc=hdlc->first_pvc; - - while (pvc) { - if (netdev_dlci(&pvc->netdev) == dlci) - return pvc; - pvc=pvc->next; - } - - return NULL; + hdr[0] = (dlci >> 2) & 0xFC; + hdr[1] = ((dlci << 4) & 0xF0) | 0x01; } @@ -332,5 +355,35 @@ static __inline__ void debug_frame(const struct sk_buff *skb) } + +/* Must be called by hardware driver when HDLC device is being opened */ +static __inline__ int hdlc_open(hdlc_device *hdlc) +{ + if (hdlc->proto == -1) + return -ENOSYS; /* no protocol attached */ + + if (hdlc->open) + return hdlc->open(hdlc); + return 0; +} + + +/* Must be called by hardware driver when HDLC device is being closed */ +static __inline__ void hdlc_close(hdlc_device *hdlc) +{ + if (hdlc->stop) + hdlc->stop(hdlc); +} + + +/* May be used by hardware driver to gain control over HDLC device */ +static __inline__ void hdlc_detach(hdlc_device *hdlc) +{ + if (hdlc->detach) + hdlc->detach(hdlc); + hdlc->detach = NULL; +} + + #endif /* __KERNEL */ #endif /* __HDLC_H */ |