LXR linux/include/linux/atmdev.h

   1/* atmdev.h - ATM device driver declarations and various related items */
   2 
   3/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
   4 
   5
   6#ifndef LINUX_ATMDEV_H
   7#define LINUX_ATMDEV_H
   8
   9
  10#include <linux/atmapi.h>
  11#include <linux/atm.h>
  12#include <linux/atmioc.h>
  13
  14
  15#define ESI_LEN         6
  16
  17#define ATM_OC3_PCR     (155520000/270*260/8/53)
  18                        /* OC3 link rate:  155520000 bps
  19                           SONET overhead: /270*260 (9 section, 1 path)
  20                           bits per cell:  /8/53
  21                           max cell rate:  353207.547 cells/sec */
  22#define ATM_25_PCR      ((25600000/8-8000)/54)
  23                        /* 25 Mbps ATM cell rate (59111) */
  24#define ATM_OC12_PCR    (622080000/1080*1040/8/53)
  25                        /* OC12 link rate: 622080000 bps
  26                           SONET overhead: /1080*1040
  27                           bits per cell:  /8/53
  28                           max cell rate:  1412830.188 cells/sec */
  29#define ATM_DS3_PCR     (8000*12)
  30                        /* DS3: 12 cells in a 125 usec time slot */
  31
  32
  33#define __AAL_STAT_ITEMS \
  34    __HANDLE_ITEM(tx);                  /* TX okay */ \
  35    __HANDLE_ITEM(tx_err);              /* TX errors */ \
  36    __HANDLE_ITEM(rx);                  /* RX okay */ \
  37    __HANDLE_ITEM(rx_err);              /* RX errors */ \
  38    __HANDLE_ITEM(rx_drop);             /* RX out of memory */
  39
  40struct atm_aal_stats {
  41#define __HANDLE_ITEM(i) int i
  42        __AAL_STAT_ITEMS
  43#undef __HANDLE_ITEM
  44};
  45
  46
  47struct atm_dev_stats {
  48        struct atm_aal_stats aal0;
  49        struct atm_aal_stats aal34;
  50        struct atm_aal_stats aal5;
  51} __ATM_API_ALIGN;
  52
  53
  54#define ATM_GETLINKRATE _IOW('a',ATMIOC_ITF+1,struct atmif_sioc)
  55                                        /* get link rate */
  56#define ATM_GETNAMES    _IOW('a',ATMIOC_ITF+3,struct atm_iobuf)
  57                                        /* get interface names (numbers) */
  58#define ATM_GETTYPE     _IOW('a',ATMIOC_ITF+4,struct atmif_sioc)
  59                                        /* get interface type name */
  60#define ATM_GETESI      _IOW('a',ATMIOC_ITF+5,struct atmif_sioc)
  61                                        /* get interface ESI */
  62#define ATM_GETADDR     _IOW('a',ATMIOC_ITF+6,struct atmif_sioc)
  63                                        /* get itf's local ATM addr. list */
  64#define ATM_RSTADDR     _IOW('a',ATMIOC_ITF+7,struct atmif_sioc)
  65                                        /* reset itf's ATM address list */
  66#define ATM_ADDADDR     _IOW('a',ATMIOC_ITF+8,struct atmif_sioc)
  67                                        /* add a local ATM address */
  68#define ATM_DELADDR     _IOW('a',ATMIOC_ITF+9,struct atmif_sioc)
  69                                        /* remove a local ATM address */
  70#define ATM_GETCIRANGE  _IOW('a',ATMIOC_ITF+10,struct atmif_sioc)
  71                                        /* get connection identifier range */
  72#define ATM_SETCIRANGE  _IOW('a',ATMIOC_ITF+11,struct atmif_sioc)
  73                                        /* set connection identifier range */
  74#define ATM_SETESI      _IOW('a',ATMIOC_ITF+12,struct atmif_sioc)
  75                                        /* set interface ESI */
  76#define ATM_SETESIF     _IOW('a',ATMIOC_ITF+13,struct atmif_sioc)
  77                                        /* force interface ESI */
  78#define ATM_ADDLECSADDR _IOW('a', ATMIOC_ITF+14, struct atmif_sioc)
  79                                        /* register a LECS address */
  80#define ATM_DELLECSADDR _IOW('a', ATMIOC_ITF+15, struct atmif_sioc)
  81                                        /* unregister a LECS address */
  82#define ATM_GETLECSADDR _IOW('a', ATMIOC_ITF+16, struct atmif_sioc)
  83                                        /* retrieve LECS address(es) */
  84
  85#define ATM_GETSTAT     _IOW('a',ATMIOC_SARCOM+0,struct atmif_sioc)
  86                                        /* get AAL layer statistics */
  87#define ATM_GETSTATZ    _IOW('a',ATMIOC_SARCOM+1,struct atmif_sioc)
  88                                        /* get AAL layer statistics and zero */
  89#define ATM_GETLOOP     _IOW('a',ATMIOC_SARCOM+2,struct atmif_sioc)
  90                                        /* get loopback mode */
  91#define ATM_SETLOOP     _IOW('a',ATMIOC_SARCOM+3,struct atmif_sioc)
  92                                        /* set loopback mode */
  93#define ATM_QUERYLOOP   _IOW('a',ATMIOC_SARCOM+4,struct atmif_sioc)
  94                                        /* query supported loopback modes */
  95#define ATM_SETSC       _IOW('a',ATMIOC_SPECIAL+1,int)
  96                                        /* enable or disable single-copy */
  97#define ATM_SETBACKEND  _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t)
  98                                        /* set backend handler */
  99#define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t)
 100                                        /* use backend to make new if */
 101#define ATM_ADDPARTY    _IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
 102                                        /* add party to p2mp call */
 103#ifdef CONFIG_COMPAT
 104/* It actually takes struct sockaddr_atmsvc, not struct atm_iobuf */
 105#define COMPAT_ATM_ADDPARTY     _IOW('a', ATMIOC_SPECIAL+4,struct compat_atm_iobuf)
 106#endif
 107#define ATM_DROPPARTY   _IOW('a', ATMIOC_SPECIAL+5,int)
 108                                        /* drop party from p2mp call */
 109
 110/*
 111 * These are backend handkers that can be set via the ATM_SETBACKEND call
 112 * above.  In the future we may support dynamic loading of these - for now,
 113 * they're just being used to share the ATMIOC_BACKEND ioctls
 114 */
 115#define ATM_BACKEND_RAW         0       
 116#define ATM_BACKEND_PPP         1       /* PPPoATM - RFC2364 */
 117#define ATM_BACKEND_BR2684      2       /* Bridged RFC1483/2684 */
 118
 119/* for ATM_GETTYPE */
 120#define ATM_ITFTYP_LEN  8       /* maximum length of interface type name */
 121
 122/*
 123 * Loopback modes for ATM_{PHY,SAR}_{GET,SET}LOOP
 124 */
 125
 126/* Point of loopback                            CPU-->SAR-->PHY-->line--> ... */
 127#define __ATM_LM_NONE   0       /* no loop back     ^     ^     ^      ^      */
 128#define __ATM_LM_AAL    1       /* loop back PDUs --'     |     |      |      */
 129#define __ATM_LM_ATM    2       /* loop back ATM cells ---'     |      |      */
 130/* RESERVED             4       loop back on PHY side  ---'                   */
 131#define __ATM_LM_PHY    8       /* loop back bits (digital) ----'      |      */
 132#define __ATM_LM_ANALOG 16      /* loop back the analog signal --------'      */
 133
 134/* Direction of loopback */
 135#define __ATM_LM_MKLOC(n)       ((n))       /* Local (i.e. loop TX to RX) */
 136#define __ATM_LM_MKRMT(n)       ((n) << 8)  /* Remote (i.e. loop RX to TX) */
 137
 138#define __ATM_LM_XTLOC(n)       ((n) & 0xff)
 139#define __ATM_LM_XTRMT(n)       (((n) >> 8) & 0xff)
 140
 141#define ATM_LM_NONE     0       /* no loopback */
 142
 143#define ATM_LM_LOC_AAL  __ATM_LM_MKLOC(__ATM_LM_AAL)
 144#define ATM_LM_LOC_ATM  __ATM_LM_MKLOC(__ATM_LM_ATM)
 145#define ATM_LM_LOC_PHY  __ATM_LM_MKLOC(__ATM_LM_PHY)
 146#define ATM_LM_LOC_ANALOG __ATM_LM_MKLOC(__ATM_LM_ANALOG)
 147
 148#define ATM_LM_RMT_AAL  __ATM_LM_MKRMT(__ATM_LM_AAL)
 149#define ATM_LM_RMT_ATM  __ATM_LM_MKRMT(__ATM_LM_ATM)
 150#define ATM_LM_RMT_PHY  __ATM_LM_MKRMT(__ATM_LM_PHY)
 151#define ATM_LM_RMT_ANALOG __ATM_LM_MKRMT(__ATM_LM_ANALOG)
 152
 153/*
 154 * Note: ATM_LM_LOC_* and ATM_LM_RMT_* can be combined, provided that
 155 * __ATM_LM_XTLOC(x) <= __ATM_LM_XTRMT(x)
 156 */
 157
 158
 159struct atm_iobuf {
 160        int length;
 161        void __user *buffer;
 162};
 163
 164/* for ATM_GETCIRANGE / ATM_SETCIRANGE */
 165
 166#define ATM_CI_MAX      -1              /* use maximum range of VPI/VCI */
 167 
 168struct atm_cirange {
 169        signed char     vpi_bits;       /* 1..8, ATM_CI_MAX (-1) for maximum */
 170        signed char     vci_bits;       /* 1..16, ATM_CI_MAX (-1) for maximum */
 171};
 172
 173/* for ATM_SETSC; actually taken from the ATM_VF number space */
 174
 175#define ATM_SC_RX       1024            /* enable RX single-copy */
 176#define ATM_SC_TX       2048            /* enable TX single-copy */
 177
 178#define ATM_BACKLOG_DEFAULT 32 /* if we get more, we're likely to time out
 179                                  anyway */
 180
 181/* MF: change_qos (Modify) flags */
 182
 183#define ATM_MF_IMMED     1      /* Block until change is effective */
 184#define ATM_MF_INC_RSV   2      /* Change reservation on increase */
 185#define ATM_MF_INC_SHP   4      /* Change shaping on increase */
 186#define ATM_MF_DEC_RSV   8      /* Change reservation on decrease */
 187#define ATM_MF_DEC_SHP  16      /* Change shaping on decrease */
 188#define ATM_MF_BWD      32      /* Set the backward direction parameters */
 189
 190#define ATM_MF_SET      (ATM_MF_INC_RSV | ATM_MF_INC_SHP | ATM_MF_DEC_RSV | \
 191                          ATM_MF_DEC_SHP | ATM_MF_BWD)
 192
 193/*
 194 * ATM_VS_* are used to express VC state in a human-friendly way.
 195 */
 196
 197#define ATM_VS_IDLE     0       /* VC is not used */
 198#define ATM_VS_CONNECTED 1      /* VC is connected */
 199#define ATM_VS_CLOSING  2       /* VC is closing */
 200#define ATM_VS_LISTEN   3       /* VC is listening for incoming setups */
 201#define ATM_VS_INUSE    4       /* VC is in use (registered with atmsigd) */
 202#define ATM_VS_BOUND    5       /* VC is bound */
 203
 204#define ATM_VS2TXT_MAP \
 205    "IDLE", "CONNECTED", "CLOSING", "LISTEN", "INUSE", "BOUND"
 206
 207#define ATM_VF2TXT_MAP \
 208    "ADDR",     "READY",        "PARTIAL",      "REGIS", \
 209    "RELEASED", "HASQOS",       "LISTEN",       "META", \
 210    "256",      "512",          "1024",         "2048", \
 211    "SESSION",  "HASSAP",       "BOUND",        "CLOSE"
 212
 213
 214#ifdef __KERNEL__
 215
 216#include <linux/wait.h> /* wait_queue_head_t */
 217#include <linux/time.h> /* struct timeval */
 218#include <linux/net.h>
 219#include <linux/bug.h>
 220#include <linux/skbuff.h> /* struct sk_buff */
 221#include <linux/uio.h>
 222#include <net/sock.h>
 223#include <linux/atomic.h>
 224
 225#ifdef CONFIG_PROC_FS
 226#include <linux/proc_fs.h>
 227
 228extern struct proc_dir_entry *atm_proc_root;
 229#endif
 230
 231#ifdef CONFIG_COMPAT
 232#include <linux/compat.h>
 233struct compat_atm_iobuf {
 234        int length;
 235        compat_uptr_t buffer;
 236};
 237#endif
 238
 239struct k_atm_aal_stats {
 240#define __HANDLE_ITEM(i) atomic_t i
 241        __AAL_STAT_ITEMS
 242#undef __HANDLE_ITEM
 243};
 244
 245
 246struct k_atm_dev_stats {
 247        struct k_atm_aal_stats aal0;
 248        struct k_atm_aal_stats aal34;
 249        struct k_atm_aal_stats aal5;
 250};
 251
 252struct device;
 253
 254enum {
 255        ATM_VF_ADDR,            /* Address is in use. Set by anybody, cleared
 256                                   by device driver. */
 257        ATM_VF_READY,           /* VC is ready to transfer data. Set by device
 258                                   driver, cleared by anybody. */
 259        ATM_VF_PARTIAL,         /* resources are bound to PVC (partial PVC
 260                                   setup), controlled by socket layer */
 261        ATM_VF_REGIS,           /* registered with demon, controlled by SVC
 262                                   socket layer */
 263        ATM_VF_BOUND,           /* local SAP is set, controlled by SVC socket
 264                                   layer */
 265        ATM_VF_RELEASED,        /* demon has indicated/requested release,
 266                                   controlled by SVC socket layer */
 267        ATM_VF_HASQOS,          /* QOS parameters have been set */
 268        ATM_VF_LISTEN,          /* socket is used for listening */
 269        ATM_VF_META,            /* SVC socket isn't used for normal data
 270                                   traffic and doesn't depend on signaling
 271                                   to be available */
 272        ATM_VF_SESSION,         /* VCC is p2mp session control descriptor */
 273        ATM_VF_HASSAP,          /* SAP has been set */
 274        ATM_VF_CLOSE,           /* asynchronous close - treat like VF_RELEASED*/
 275        ATM_VF_WAITING,         /* waiting for reply from sigd */
 276        ATM_VF_IS_CLIP,         /* in use by CLIP protocol */
 277};
 278
 279
 280#define ATM_VF2VS(flags) \
 281    (test_bit(ATM_VF_READY,&(flags)) ? ATM_VS_CONNECTED : \
 282     test_bit(ATM_VF_RELEASED,&(flags)) ? ATM_VS_CLOSING : \
 283     test_bit(ATM_VF_LISTEN,&(flags)) ? ATM_VS_LISTEN : \
 284     test_bit(ATM_VF_REGIS,&(flags)) ? ATM_VS_INUSE : \
 285     test_bit(ATM_VF_BOUND,&(flags)) ? ATM_VS_BOUND : ATM_VS_IDLE)
 286
 287
 288enum {
 289        ATM_DF_REMOVED,         /* device was removed from atm_devs list */
 290};
 291
 292
 293#define ATM_PHY_SIG_LOST    0   /* no carrier/light */
 294#define ATM_PHY_SIG_UNKNOWN 1   /* carrier/light status is unknown */
 295#define ATM_PHY_SIG_FOUND   2   /* carrier/light okay */
 296
 297#define ATM_ATMOPT_CLP  1       /* set CLP bit */
 298
 299struct atm_vcc {
 300        /* struct sock has to be the first member of atm_vcc */
 301        struct sock     sk;
 302        unsigned long   flags;          /* VCC flags (ATM_VF_*) */
 303        short           vpi;            /* VPI and VCI (types must be equal */
 304                                        /* with sockaddr) */
 305        int             vci;
 306        unsigned long   aal_options;    /* AAL layer options */
 307        unsigned long   atm_options;    /* ATM layer options */
 308        struct atm_dev  *dev;           /* device back pointer */
 309        struct atm_qos  qos;            /* QOS */
 310        struct atm_sap  sap;            /* SAP */
 311        void (*push)(struct atm_vcc *vcc,struct sk_buff *skb);
 312        void (*pop)(struct atm_vcc *vcc,struct sk_buff *skb); /* optional */
 313        int (*push_oam)(struct atm_vcc *vcc,void *cell);
 314        int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 315        void            *dev_data;      /* per-device data */
 316        void            *proto_data;    /* per-protocol data */
 317        struct k_atm_aal_stats *stats;  /* pointer to AAL stats group */
 318        /* SVC part --- may move later ------------------------------------- */
 319        short           itf;            /* interface number */
 320        struct sockaddr_atmsvc local;
 321        struct sockaddr_atmsvc remote;
 322        /* Multipoint part ------------------------------------------------- */
 323        struct atm_vcc  *session;       /* session VCC descriptor */
 324        /* Other stuff ----------------------------------------------------- */
 325        void            *user_back;     /* user backlink - not touched by */
 326                                        /* native ATM stack. Currently used */
 327                                        /* by CLIP and sch_atm. */
 328};
 329
 330static inline struct atm_vcc *atm_sk(struct sock *sk)
 331{
 332        return (struct atm_vcc *)sk;
 333}
 334
 335static inline struct atm_vcc *ATM_SD(struct socket *sock)
 336{
 337        return atm_sk(sock->sk);
 338}
 339
 340static inline struct sock *sk_atm(struct atm_vcc *vcc)
 341{
 342        return (struct sock *)vcc;
 343}
 344
 345struct atm_dev_addr {
 346        struct sockaddr_atmsvc addr;    /* ATM address */
 347        struct list_head entry;         /* next address */
 348};
 349
 350enum atm_addr_type_t { ATM_ADDR_LOCAL, ATM_ADDR_LECS };
 351
 352struct atm_dev {
 353        const struct atmdev_ops *ops;   /* device operations; NULL if unused */
 354        const struct atmphy_ops *phy;   /* PHY operations, may be undefined */
 355                                        /* (NULL) */
 356        const char      *type;          /* device type name */
 357        int             number;         /* device index */
 358        void            *dev_data;      /* per-device data */
 359        void            *phy_data;      /* private PHY date */
 360        unsigned long   flags;          /* device flags (ATM_DF_*) */
 361        struct list_head local;         /* local ATM addresses */
 362        struct list_head lecs;          /* LECS ATM addresses learned via ILMI */
 363        unsigned char   esi[ESI_LEN];   /* ESI ("MAC" addr) */
 364        struct atm_cirange ci_range;    /* VPI/VCI range */
 365        struct k_atm_dev_stats stats;   /* statistics */
 366        char            signal;         /* signal status (ATM_PHY_SIG_*) */
 367        int             link_rate;      /* link rate (default: OC3) */
 368        atomic_t        refcnt;         /* reference count */
 369        spinlock_t      lock;           /* protect internal members */
 370#ifdef CONFIG_PROC_FS
 371        struct proc_dir_entry *proc_entry; /* proc entry */
 372        char *proc_name;                /* proc entry name */
 373#endif
 374        struct device class_dev;        /* sysfs device */
 375        struct list_head dev_list;      /* linkage */
 376};
 377
 378 
 379/* OF: send_Oam Flags */
 380
 381#define ATM_OF_IMMED  1         /* Attempt immediate delivery */
 382#define ATM_OF_INRATE 2         /* Attempt in-rate delivery */
 383
 384
 385/*
 386 * ioctl, getsockopt, and setsockopt are optional and can be set to NULL.
 387 */
 388
 389struct atmdev_ops { /* only send is required */
 390        void (*dev_close)(struct atm_dev *dev);
 391        int (*open)(struct atm_vcc *vcc);
 392        void (*close)(struct atm_vcc *vcc);
 393        int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 394#ifdef CONFIG_COMPAT
 395        int (*compat_ioctl)(struct atm_dev *dev,unsigned int cmd,
 396                            void __user *arg);
 397#endif
 398        int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
 399            void __user *optval,int optlen);
 400        int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
 401            void __user *optval,unsigned int optlen);
 402        int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
 403        int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
 404        void (*phy_put)(struct atm_dev *dev,unsigned char value,
 405            unsigned long addr);
 406        unsigned char (*phy_get)(struct atm_dev *dev,unsigned long addr);
 407        int (*change_qos)(struct atm_vcc *vcc,struct atm_qos *qos,int flags);
 408        int (*proc_read)(struct atm_dev *dev,loff_t *pos,char *page);
 409        struct module *owner;
 410};
 411
 412struct atmphy_ops {
 413        int (*start)(struct atm_dev *dev);
 414        int (*ioctl)(struct atm_dev *dev,unsigned int cmd,void __user *arg);
 415        void (*interrupt)(struct atm_dev *dev);
 416        int (*stop)(struct atm_dev *dev);
 417};
 418
 419struct atm_skb_data {
 420        struct atm_vcc  *vcc;           /* ATM VCC */
 421        unsigned long   atm_options;    /* ATM layer options */
 422};
 423
 424#define VCC_HTABLE_SIZE 32
 425
 426extern struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
 427extern rwlock_t vcc_sklist_lock;
 428
 429#define ATM_SKB(skb) (((struct atm_skb_data *) (skb)->cb))
 430
 431struct atm_dev *atm_dev_register(const char *type, struct device *parent,
 432                                 const struct atmdev_ops *ops,
 433                                 int number, /* -1 == pick first available */
 434                                 unsigned long *flags);
 435struct atm_dev *atm_dev_lookup(int number);
 436void atm_dev_deregister(struct atm_dev *dev);
 437
 438/* atm_dev_signal_change
 439 *
 440 * Propagate lower layer signal change in atm_dev->signal to netdevice.
 441 * The event will be sent via a notifier call chain.
 442 */
 443void atm_dev_signal_change(struct atm_dev *dev, char signal);
 444
 445void vcc_insert_socket(struct sock *sk);
 446
 447void atm_dev_release_vccs(struct atm_dev *dev);
 448
 449
 450static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
 451{
 452        atomic_add(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 453}
 454
 455
 456static inline void atm_return(struct atm_vcc *vcc,int truesize)
 457{
 458        atomic_sub(truesize, &sk_atm(vcc)->sk_rmem_alloc);
 459}
 460
 461
 462static inline int atm_may_send(struct atm_vcc *vcc,unsigned int size)
 463{
 464        return (size + atomic_read(&sk_atm(vcc)->sk_wmem_alloc)) <
 465               sk_atm(vcc)->sk_sndbuf;
 466}
 467
 468
 469static inline void atm_dev_hold(struct atm_dev *dev)
 470{
 471        atomic_inc(&dev->refcnt);
 472}
 473
 474
 475static inline void atm_dev_put(struct atm_dev *dev)
 476{
 477        if (atomic_dec_and_test(&dev->refcnt)) {
 478                BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
 479                if (dev->ops->dev_close)
 480                        dev->ops->dev_close(dev);
 481                put_device(&dev->class_dev);
 482        }
 483}
 484
 485
 486int atm_charge(struct atm_vcc *vcc,int truesize);
 487struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
 488    gfp_t gfp_flags);
 489int atm_pcr_goal(const struct atm_trafprm *tp);
 490
 491void vcc_release_async(struct atm_vcc *vcc, int reply);
 492
 493struct atm_ioctl {
 494        struct module *owner;
 495        /* A module reference is kept if appropriate over this call.
 496         * Return -ENOIOCTLCMD if you don't handle it. */
 497        int (*ioctl)(struct socket *, unsigned int cmd, unsigned long arg);
 498        struct list_head list;
 499};
 500
 501/**
 502 * register_atm_ioctl - register handler for ioctl operations
 503 *
 504 * Special (non-device) handlers of ioctl's should
 505 * register here. If you're a normal device, you should
 506 * set .ioctl in your atmdev_ops instead.
 507 */
 508void register_atm_ioctl(struct atm_ioctl *);
 509
 510/**
 511 * deregister_atm_ioctl - remove the ioctl handler
 512 */
 513void deregister_atm_ioctl(struct atm_ioctl *);
 514
 515
 516/* register_atmdevice_notifier - register atm_dev notify events
 517 *
 518 * Clients like br2684 will register notify events
 519 * Currently we notify of signal found/lost
 520 */
 521int register_atmdevice_notifier(struct notifier_block *nb);
 522void unregister_atmdevice_notifier(struct notifier_block *nb);
 523
 524#endif /* __KERNEL__ */
 525
 526#endif
 527