1/* $Id: isdn_net.h,v 1.1.2.2 2004/01/12 22:37:19 Exp $ 2 * 3 * header for Linux ISDN subsystem, network related functions (linklevel). 4 * 5 * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de) 6 * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg 7 * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de) 8 * 9 * This software may be used and distributed according to the terms 10 * of the GNU General Public License, incorporated herein by reference. 11 * 12 */ 13 14 /* Definitions for hupflags: */ 15#define ISDN_WAITCHARGE 1 /* did not get a charge info yet */ 16#define ISDN_HAVECHARGE 2 /* We know a charge info */ 17#define ISDN_CHARGEHUP 4 /* We want to use the charge mechanism */ 18#define ISDN_INHUP 8 /* Even if incoming, close after huptimeout */ 19#define ISDN_MANCHARGE 16 /* Charge Interval manually set */ 20 21/* 22 * Definitions for Cisco-HDLC header. 23 */ 24 25#define CISCO_ADDR_UNICAST 0x0f 26#define CISCO_ADDR_BROADCAST 0x8f 27#define CISCO_CTRL 0x00 28#define CISCO_TYPE_CDP 0x2000 29#define CISCO_TYPE_SLARP 0x8035 30#define CISCO_SLARP_REQUEST 0 31#define CISCO_SLARP_REPLY 1 32#define CISCO_SLARP_KEEPALIVE 2 33 34extern char *isdn_net_new(char *, struct net_device *); 35extern char *isdn_net_newslave(char *); 36extern int isdn_net_rm(char *); 37extern int isdn_net_rmall(void); 38extern int isdn_net_stat_callback(int, isdn_ctrl *); 39extern int isdn_net_setcfg(isdn_net_ioctl_cfg *); 40extern int isdn_net_getcfg(isdn_net_ioctl_cfg *); 41extern int isdn_net_addphone(isdn_net_ioctl_phone *); 42extern int isdn_net_getphones(isdn_net_ioctl_phone *, char __user *); 43extern int isdn_net_getpeer(isdn_net_ioctl_phone *, isdn_net_ioctl_phone __user *); 44extern int isdn_net_delphone(isdn_net_ioctl_phone *); 45extern int isdn_net_find_icall(int, int, int, setup_parm *); 46extern void isdn_net_hangup(struct net_device *); 47extern void isdn_net_dial(void); 48extern void isdn_net_autohup(void); 49extern int isdn_net_force_hangup(char *); 50extern int isdn_net_force_dial(char *); 51extern isdn_net_dev *isdn_net_findif(char *); 52extern int isdn_net_rcv_skb(int, struct sk_buff *); 53extern int isdn_net_dial_req(isdn_net_local *); 54extern void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb); 55extern void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb); 56 57#define ISDN_NET_MAX_QUEUE_LENGTH 2 58 59#define ISDN_MASTER_PRIV(lp) ((isdn_net_local *) netdev_priv(lp->master)) 60#define ISDN_SLAVE_PRIV(lp) ((isdn_net_local *) netdev_priv(lp->slave)) 61#define MASTER_TO_SLAVE(master) \ 62 (((isdn_net_local *) netdev_priv(master))->slave) 63 64/* 65 * is this particular channel busy? 66 */ 67static __inline__ int isdn_net_lp_busy(isdn_net_local *lp) 68{ 69 if (atomic_read(&lp->frame_cnt) < ISDN_NET_MAX_QUEUE_LENGTH) 70 return 0; 71 else 72 return 1; 73} 74 75/* 76 * For the given net device, this will get a non-busy channel out of the 77 * corresponding bundle. The returned channel is locked. 78 */ 79static __inline__ isdn_net_local * isdn_net_get_locked_lp(isdn_net_dev *nd) 80{ 81 unsigned long flags; 82 isdn_net_local *lp; 83 84 spin_lock_irqsave(&nd->queue_lock, flags); 85 lp = nd->queue; /* get lp on top of queue */ 86 while (isdn_net_lp_busy(nd->queue)) { 87 nd->queue = nd->queue->next; 88 if (nd->queue == lp) { /* not found -- should never happen */ 89 lp = NULL; 90 goto errout; 91 } 92 } 93 lp = nd->queue; 94 nd->queue = nd->queue->next; 95 spin_unlock_irqrestore(&nd->queue_lock, flags); 96 spin_lock(&lp->xmit_lock); 97 local_bh_disable(); 98 return lp; 99errout: 100 spin_unlock_irqrestore(&nd->queue_lock, flags); 101 return lp; 102} 103 104/* 105 * add a channel to a bundle 106 */ 107static __inline__ void isdn_net_add_to_bundle(isdn_net_dev *nd, isdn_net_local *nlp) 108{ 109 isdn_net_local *lp; 110 unsigned long flags; 111 112 spin_lock_irqsave(&nd->queue_lock, flags); 113 114 lp = nd->queue; 115// printk(KERN_DEBUG "%s: lp:%s(%p) nlp:%s(%p) last(%p)\n", 116// __func__, lp->name, lp, nlp->name, nlp, lp->last); 117 nlp->last = lp->last; 118 lp->last->next = nlp; 119 lp->last = nlp; 120 nlp->next = lp; 121 nd->queue = nlp; 122 123 spin_unlock_irqrestore(&nd->queue_lock, flags); 124} 125/* 126 * remove a channel from the bundle it belongs to 127 */ 128static __inline__ void isdn_net_rm_from_bundle(isdn_net_local *lp) 129{ 130 isdn_net_local *master_lp = lp; 131 unsigned long flags; 132 133 if (lp->master) 134 master_lp = ISDN_MASTER_PRIV(lp); 135 136// printk(KERN_DEBUG "%s: lp:%s(%p) mlp:%s(%p) last(%p) next(%p) mndq(%p)\n", 137// __func__, lp->name, lp, master_lp->name, master_lp, lp->last, lp->next, master_lp->netdev->queue); 138 spin_lock_irqsave(&master_lp->netdev->queue_lock, flags); 139 lp->last->next = lp->next; 140 lp->next->last = lp->last; 141 if (master_lp->netdev->queue == lp) { 142 master_lp->netdev->queue = lp->next; 143 if (lp->next == lp) { /* last in queue */ 144 master_lp->netdev->queue = master_lp->netdev->local; 145 } 146 } 147 lp->next = lp->last = lp; /* (re)set own pointers */ 148// printk(KERN_DEBUG "%s: mndq(%p)\n", 149// __func__, master_lp->netdev->queue); 150 spin_unlock_irqrestore(&master_lp->netdev->queue_lock, flags); 151} 152